CN113820224A - High-temperature creep test device applied to exhaust system - Google Patents
High-temperature creep test device applied to exhaust system Download PDFInfo
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- CN113820224A CN113820224A CN202111118730.8A CN202111118730A CN113820224A CN 113820224 A CN113820224 A CN 113820224A CN 202111118730 A CN202111118730 A CN 202111118730A CN 113820224 A CN113820224 A CN 113820224A
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- 238000012360 testing method Methods 0.000 title claims abstract description 77
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a high-temperature creep test device applied to an exhaust system, which comprises a base platform, a temperature control box, a computer and at least two groups of test mechanisms, wherein the temperature control box, the computer and the at least two groups of test mechanisms are fixedly connected to the top surface of the base platform; the testing mechanism comprises a bearing support, a tubular furnace, a plurality of weights, at least two groups of guide pillars, weight trays, a distance measuring sensor, a first fixing rod, a second fixing rod, a first chuck, a second chuck and a testing sample piece which are connected with one another; the test sample piece is positioned in the accommodating space of the tube furnace, and the tube furnace is fixedly connected with the bearing support; the distance measuring sensor is located below the weight tray and fixedly connected with the bearing support. The testing device provided by the invention realizes real-time acquisition of time, temperature and creep curves, realizes accurate temperature control of the temperature in the furnace, can realize parallel connection of a plurality of tubular furnaces, and simultaneously controls the tubular furnaces, thereby improving the working efficiency.
Description
Technical Field
The invention belongs to the technical field of automobile exhaust systems, and particularly relates to a high-temperature creep test device applied to an exhaust system.
Background
At present, when a hot-end metal of an automobile exhaust system works, the temperature can reach over 900 ℃, materials are subjected to continuous load under the action of high temperature, the problems of creep failure and the like easily occur, the use temperature of a silica gel lifting lug is also increased along with the increase of the exhaust temperature of a national exhaust product, and the high-temperature creep performance of the material is an index needing to be checked under the condition of long-term load.
The high-temperature creep test equipment in the related technology is used for testing the mechanical property of materials, and can perform stress relaxation test, high-temperature short-time tensile test, low-cycle test and the like in addition to conventional creep and endurance test.
However, the high-temperature creep testing equipment in the related art cannot automatically judge the creep amount of the material, cannot accurately control and collect the temperature of the tube furnace, cannot control a plurality of tube furnaces in parallel, and is low in working efficiency.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a high-temperature creep test device applied to an exhaust system, and aims to solve the technical problems of how to realize real-time acquisition of time, temperature and creep curves, realize accurate temperature control of the temperature in a furnace, and realize parallel connection and simultaneous control of a plurality of tubular furnaces, thereby improving the working efficiency.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the technical scheme that:
a high-temperature creep test device applied to an exhaust system comprises a base platform, a temperature control box, a computer and at least two groups of test mechanisms, wherein the temperature control box, the computer and the at least two groups of test mechanisms are fixedly connected to the top surface of the base platform;
the testing mechanism comprises a bearing support, a tube furnace, a plurality of weights, at least two groups of guide pillars, weight trays, a distance measuring sensor, a first fixing rod, a second fixing rod, a first chuck, a second chuck and a testing sample piece;
the bottom of the bearing support is fixedly connected with the top surface of the base platform; the bottoms of at least two groups of guide pillars are fixedly connected with the bottom end of the bearing support; the weight tray is positioned between at least two groups of the guide posts and is connected with the at least two groups of the guide posts in a sliding manner; the weights are arranged on the weight tray, and openings are formed in the weights;
the first end of the first fixing rod penetrates through the opening to be fixedly connected with the weight tray, and the second end of the first fixing rod is in threaded connection with the first end of the first chuck;
the first end of the second fixed rod is fixedly connected with the top end of the bearing support, and the second end of the second fixed rod is in threaded connection with the first end of the second chuck;
two ends of the test sample piece are fixedly connected with the second end of the first chuck and the second end of the second chuck respectively;
the test sample piece is positioned in the accommodating space of the tube furnace, and the tube furnace is fixedly connected with the bearing support;
the distance measuring sensor is positioned below the weight tray and fixedly connected with the bearing support;
the temperature control box is electrically connected with the tube furnace, and the distance measuring sensor and the temperature control box are in communication connection with the computer.
Optionally, the tube furnace is fixedly connected with the load-bearing support through at least four sets of connecting plates.
Optionally, the side wall of the tube furnace is fixedly connected with the load-bearing support through six groups of connecting plates.
Optionally, both ends of the test sample piece are fixedly connected with the second end of the first chuck and the second end of the second chuck respectively through fixing pins.
Optionally, the number of the testing mechanisms is two, and the two testing mechanisms are parallel to each other.
Optionally, the guide posts are arranged in two groups, the guide posts are symmetrically arranged about a central axis of the weight tray, and the two groups of guide posts are perpendicular to the weight tray.
Optionally, the axis of weight tray, the axis of first dead lever the axis of first chuck the axis of test sample spare the axis of second chuck the axis of second dead lever and distance measuring sensor's axis all coincides.
Optionally, the load-bearing support is C-shaped, and the tube furnace is cylindrical with a hollow interior.
Has the advantages that: compared with the prior art, the high-temperature creep test device applied to the exhaust system provided by the invention realizes real-time acquisition of time, temperature and creep curves, realizes accurate temperature control of the temperature in the furnace, can realize parallel connection of a plurality of tubular furnaces, controls the tubular furnaces at the same time, and improves the working efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a main structure of a high temperature creep test apparatus applied to an exhaust system according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a partial structure of a testing mechanism of a high-temperature creep testing apparatus applied to an exhaust system according to an exemplary embodiment of the present invention;
in the figure: 1. a base platform; 2. a temperature control box; 3. a computer; 4. a load bearing support; 5. a tube furnace; 6. a weight; 601. an opening; 7. a guide post; 8. a weight tray; 9. a ranging sensor; 10. a first fixing lever; 11. a second fixing bar; 122. a first chuck; 13. a second chuck; 14. testing a sample piece; 15. a connecting plate; 16. and fixing the pin.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The invention is further described with reference to the following figures and examples.
As shown in fig. 1, the high temperature creep test device applied to the exhaust system includes a base platform 1, a temperature control box 2, a computer 3, and at least two sets of testing mechanisms, where the temperature control box 2, the computer 3, and the at least two sets of testing mechanisms are all fixedly connected to a top surface of the base platform 1, and optionally, the connection modes of the temperature control box 2, the computer 3, and the at least two sets of testing mechanisms and the base platform 1 include but are not limited to one of welding, riveting, and bolt fixing;
as shown in fig. 2, the testing mechanism includes a bearing support 4, a tube furnace 5, a plurality of weights 6, at least two sets of guide pillars 7, a weight tray 8, a distance measuring sensor 9, a first fixing rod 10, a second fixing rod 11, a first chuck 12, a second chuck 13 and a test sample piece 14;
as shown in fig. 1 and fig. 2, the bottom of the load-bearing support 4 is fixedly connected to the top surface of the base platform 1, and optionally, the connection manner of the load-bearing support 4 and the base platform 1 includes, but is not limited to, one of welding, riveting and bolting; the bottoms of the at least two groups of guide pillars 7 are fixedly connected with the bottom end of the bearing support 4, optionally, the connection mode of the at least two groups of guide pillars 7 and the bearing support 4 includes but is not limited to one of welding, riveting and bolt fixing; the weight tray 8 is positioned between the at least two groups of guide pillars 7, the weight tray 8 is connected with the at least two groups of guide pillars 7 in a sliding manner, optionally, the weight tray 8 and the at least two groups of guide pillars 7 are provided with slide rails on the side walls of the guide pillars 7, and the side walls of the weight tray 8 are provided with slide blocks, so that the up-and-down sliding connection is realized; optionally, at least two groups of through holes corresponding to the at least two groups of guide pillars 7 are formed in the weight tray 8 and are sleeved on the at least two groups of guide pillars 7, so that the up-and-down sliding connection in a shaft sleeve mode is realized; the weights 6 are all arranged on the weight tray 8, and the weights 6 are all provided with openings 601;
as shown in fig. 2, a first end of the first fixing rod 10 passes through the opening 601 to be fixedly connected to the weight tray 8, and optionally, the first fixing rod 10 is connected to the weight tray 8 by one of, but not limited to, welding, riveting, bolting, and fixing with a fixing pin; the second end of the first fixing rod 10 is in threaded connection with the first end of the first chuck 12;
as shown in fig. 2, the first end of the second fixing rod 11 is fixedly connected to the top end of the load-bearing support 4, and optionally, the second fixing rod 11 is connected to the load-bearing support 4 by one of, but not limited to, welding, riveting, bolting, and fixing with a fixing pin; the second end of the second fixed rod 11 is in threaded connection with the first end of the second chuck 13;
as shown in fig. 2, two ends of the test sample 14 are fixedly connected to the second end of the first chuck 12 and the second end of the second chuck 13, optionally, the connection manner of the two ends of the test sample 14 to the first chuck 12 and the second chuck 13 includes, but is not limited to, one of welding, riveting, bolt fixing, and fixing pin fixing;
as shown in fig. 1, the test sample 14 is located in the accommodating space of the tube furnace 5, the tube furnace 5 is fixedly connected with the load-bearing support 4, and optionally, the connection manner of the tube furnace 5 and the load-bearing support 4 includes, but is not limited to, one of welding, riveting, bolt fixing, fixing pin fixing, and connecting piece fixing;
as shown in fig. 1 and 2, the distance measuring sensor 9 is located below the weight tray 8, and the distance measuring sensor 9 is fixedly connected with the bearing support 4 and is used for measuring the displacement of the test sample piece 14 in the vertical direction in real time;
the temperature control box 2 is electrically connected with the tube furnace 5, and the distance measuring sensor 9 and the temperature control box 2 are both in communication connection with the computer 3.
In the embodiment of the application, the temperature rise rate and the accurate control of the temperature of the tubular furnace 5 are controlled by the temperature control box 2; the computer 3 is used for collecting and recording parameters such as temperature, creep amount and the like, and the control equipment is used for closing temperature heating when the set creep amount is reached.
In the embodiment of the present application, the first chuck 12 and the second chuck 13 are made of nickel-based alloy steel, so that the creep resistance is good at high temperature, and failure is prevented at high temperature.
In this embodiment of the application, optionally, a limit sensor is further disposed on the at least two sets of guide pillars 7, and the limit sensor is used to prevent the weight tray 8 from colliding with the distance measuring sensor 9 when sliding downward, so as to protect the distance measuring sensor 9.
It should be noted that, a plurality of testing mechanisms may be disposed on the base platform 1, one temperature control box 2 is used to realize multi-channel temperature control, and a computer is used to make a testing method, automatically store data and issue a corresponding testing report.
As an alternative embodiment, the tube furnace 5 is fixedly connected to the support frame 4 by at least four sets of connection plates 15.
Optionally, the tube furnace 5 is connected to the load-bearing support 4 by welding or bolting via at least four sets of connection plates 15.
As an alternative, the side walls of the tube furnace 5 are fixedly connected to the support frame 4 by six sets of connecting plates 15.
Optionally, the tube furnace 5 is connected with the load-bearing support 4 by welding or bolting through six sets of connecting plates 15.
As an alternative embodiment, both ends of the test sample 14 are fixedly connected to the second end of the first chuck 12 and the second end of the second chuck 13 by fixing pins 16.
In the present embodiment, the test sample 14 has pin holes at both ends that mate with the retaining pins 16.
As an alternative embodiment, the testing mechanisms are in two groups, and the two groups of testing mechanisms are parallel to each other.
As an optional embodiment, the guide posts 7 are two groups, the guide posts 7 are symmetrically arranged about the central axis of the weight tray 8, and the two groups of guide posts 7 are perpendicular to the weight tray 8.
As an optional implementation manner, the central axis of the weight tray 8, the central axis of the first fixing rod 10, the central axis of the first chuck 12, the central axis of the test sample 14, the central axis of the second chuck 13, the central axis of the second fixing rod 11, and the central axis of the distance measuring sensor 9 are all overlapped.
As an alternative embodiment, the load-bearing support 4 is C-shaped and the tube furnace 5 is cylindrical with a hollow interior.
For a better understanding of the present invention, reference is made to the following description of the invention taken in conjunction with the accompanying drawings and a specific embodiment. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and do not limit the protection scope of the present invention.
In this embodiment, in order to solve how to realize real-time acquisition time, temperature, creep curve and to realize accurate accuse temperature to the interior temperature of stove, can connect in parallel moreover many tube furnaces, control simultaneously, improve work efficiency's problem, use the high temperature creep test device who is applied to exhaust system who records in above-mentioned arbitrary embodiment, the theory of operation of the device includes following steps:
step one, assembling a test sample 14 on a first chuck 12 and a second chuck 13 through a fixing pin 16;
placing a proper number of weights 6 on a weight tray 8;
step three, setting heating target temperature and heating time or stopping test conditions after certain creep quantity is accumulated through the computer 3;
step four, starting the temperature control box 2, and receiving the creep quantity of the test sample piece 14 acquired by the distance measuring sensor 9 in real time through the computer 3;
and step five, deriving test data and a test report by the computer 3.
In conclusion, the high-temperature creep test device applied to the exhaust system provided by the invention realizes real-time acquisition of time, temperature and creep curves, realizes accurate temperature control of the temperature in the furnace, can realize parallel connection of a plurality of tubular furnaces, and simultaneously controls the tubular furnaces, thereby improving the working efficiency. Specifically, the temperature control box and the computer are jointly controlled, so that the temperature rise speed and the heat preservation precision in the tube furnace are well controlled, detection means and methods can be customized, the relation among time, temperature and creep variables can be acquired and displayed in real time, and after a certain condition is reached, the computer sends an instruction to stop the test, automatically stores data and issues a corresponding report.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (8)
1. The high-temperature creep test device applied to the exhaust system is characterized by comprising a base platform (1), a temperature control box (2), a computer (3) and at least two groups of test mechanisms, wherein the temperature control box (2), the computer (3) and the at least two groups of test mechanisms are fixedly connected to the top surface of the base platform (1);
the testing mechanism comprises a bearing support (4), a tube furnace (5), a plurality of weights (6), at least two groups of guide pillars (7), weight trays (8), a distance measuring sensor (9), a first fixing rod (10), a second fixing rod (11), a first chuck (12), a second chuck (13) and a test sample piece (14);
the bottom of the bearing support (4) is fixedly connected with the top surface of the base platform (1); the bottoms of at least two groups of guide columns (7) are fixedly connected with the bottom end of the bearing support (4); the weight tray (8) is positioned between at least two groups of guide pillars (7), and the weight tray (8) is connected with at least two groups of guide pillars (7) in a sliding manner; the weights (6) are all arranged on the weight tray (8), and openings (601) are formed in the weights (6);
a first end of the first fixing rod (10) penetrates through the opening (601) to be fixedly connected with the weight tray (8), and a second end of the first fixing rod (10) is in threaded connection with a first end of the first chuck (12);
the first end of the second fixing rod (11) is fixedly connected with the top end of the bearing support (4), and the second end of the second fixing rod (11) is in threaded connection with the first end of the second chuck (13);
two ends of the test sample piece (14) are fixedly connected with the second end of the first chuck (12) and the second end of the second chuck (13) respectively;
the test sample piece (14) is positioned in the accommodating space of the tube furnace (5), and the tube furnace (5) is fixedly connected with the bearing support (4);
the distance measuring sensor (9) is positioned below the weight tray (8), and the distance measuring sensor (9) is fixedly connected with the bearing support (4);
the temperature control box (2) is electrically connected with the tube furnace (5), and the distance measuring sensor (9) and the temperature control box (2) are in communication connection with the computer (3).
2. The high temperature creep test apparatus applied to an exhaust system according to claim 1, wherein the tube furnace (5) is fixedly connected to the load bearing support (4) by at least four sets of connection plates (15).
3. The high temperature creep test apparatus applied to an exhaust system according to claim 2, wherein the side wall of the tube furnace (5) is fixedly connected to the load bearing bracket (4) by six sets of the connection plates (15).
4. The high-temperature creep test device applied to an exhaust system according to claim 1, wherein both ends of the test sample (14) are fixedly connected with the second end of the first chuck (12) and the second end of the second chuck (13) respectively through fixing pins (16).
5. The high temperature creep test apparatus applied to an exhaust system according to claim 1, wherein the testing mechanisms are two groups, and the two groups of the testing mechanisms are parallel to each other.
6. The high-temperature creep test device applied to an exhaust system according to claim 1, characterized in that the guide posts (7) are arranged in two groups, the guide posts (7) are symmetrically arranged about the central axis of the weight tray (8), and the two groups of guide posts (7) are perpendicular to the weight tray (8).
7. The high-temperature creep test device applied to an exhaust system of claim 1, wherein the central axis of the weight tray (8), the central axis of the first fixing rod (10), the central axis of the first chuck (12), the central axis of the test sample piece (14), the central axis of the second chuck (13), the central axis of the second fixing rod (11) and the central axis of the distance measuring sensor (9) are all coincident.
8. The high temperature creep test apparatus applied to an exhaust system according to claim 1, wherein the load bearing bracket (4) is C-shaped, and the tube furnace (5) is cylindrical with a hollow interior.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114047079A (en) * | 2021-12-24 | 2022-02-15 | 西北工业大学 | Alloy structural component testing device and method |
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CN1837797A (en) * | 2006-04-14 | 2006-09-27 | 南京工业大学 | Small-punching creep test system |
CN202533335U (en) * | 2011-12-30 | 2012-11-14 | 华东理工大学 | Multi-head creep testing device for miniature samples |
CN109520857A (en) * | 2018-12-07 | 2019-03-26 | 华东理工大学 | High-throughput small sample creep and On Creep Crack Growth experimental rig and its application method |
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2021
- 2021-09-24 CN CN202111118730.8A patent/CN113820224B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1837797A (en) * | 2006-04-14 | 2006-09-27 | 南京工业大学 | Small-punching creep test system |
CN202533335U (en) * | 2011-12-30 | 2012-11-14 | 华东理工大学 | Multi-head creep testing device for miniature samples |
CN109520857A (en) * | 2018-12-07 | 2019-03-26 | 华东理工大学 | High-throughput small sample creep and On Creep Crack Growth experimental rig and its application method |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN114047079A (en) * | 2021-12-24 | 2022-02-15 | 西北工业大学 | Alloy structural component testing device and method |
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