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System for predicting fatigue limit of magnesium alloy member based on infrared thermal imaging, and method thereof

A fatigue limit, magnesium alloy technology, used in measuring devices, using repetitive force/pulse force to test material strength, instruments, etc., can solve problems such as wasting time

Inactive Publication Date: 2013-05-01
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It not only consumes a lot of manpower and material resources, but also wastes a lot of time. It takes days or even months to evaluate and predict the fatigue life of a material. Generally, the number of cycles is 10 7 The load at time is the fatigue limit and conditional fatigue limit of magnesium alloy

Method used

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  • System for predicting fatigue limit of magnesium alloy member based on infrared thermal imaging, and method thereof
  • System for predicting fatigue limit of magnesium alloy member based on infrared thermal imaging, and method thereof
  • System for predicting fatigue limit of magnesium alloy member based on infrared thermal imaging, and method thereof

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with specific embodiments.

[0024] figure 1 As shown, the structural schematic diagram of the fatigue test piece designed to simulate the magnesium alloy component, in which 1-1 is the form of the base metal fatigue test piece, which is directly machined from the base metal sample, and 1-2 is the test piece form of the butt joint (A is the top view, B is the main view), 1-3 is the test piece form of the transverse cross joint (A is the top view, B is the main view), the sample is welded first and then machined into shape, 1-4 is the longitudinal non-cross joint The load-bearing cross joint (A is the top view, B is the main view), 1-5 shows the test piece form of the side connection joint (A is the top view, B is the main view, and C is the side view), the side connection joint and the longitudinal non-load-bearing cross The joints are machined first and then welded into shape.

[0025] figure 2 ...

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Abstract

The invention discloses a system for predicting the fatigue limit of a magnesium alloy member based on infrared thermal imaging, and a method thereof. The system comprises: fatigue tester jigs (1); a fatigue test piece (2) comprising a magnesium alloy base material and a welded joint test piece; a fatigue test control system (3); a fatigue test system (4) used for the fatigue test of the magnesium alloy base material and the welded joint test piece to obtain a magnesium alloy fatigue limit under a cycle frequency of 10<7 >; an infrared temperature measurement system (8) for obtaining the surface temperature change curve of the fatigue test piece (2) in the fatigue test process and recording the temperature change data of the fatigue test piece (2) in the fatigue process; and a comprehensive analysis system (5) applying origin software to compare the obtained magnesium alloy fatigue limit with a fatigue limit obtained through routine fatigue tests in order to judge the measurement accuracy. The system and the method can be used for estimating the dangerous point and the fatigue limit of a welding structure in service.

Description

technical field [0001] The invention relates to a system and method for predicting the fatigue limit of a magnesium alloy component based on infrared thermal imaging, and relates to the application field of the measurement of the fatigue risk point of the magnesium alloy and its welded structure and the prediction of the fatigue limit. Background technique [0002] Magnesium is an excellent non-ferrous metal with a density of 1.74g / cm 2 , my country is the country with the most abundant magnesium reserves in the world. [0003] Magnesium alloy is the lightest metal structure material. It has the characteristics of low density, high specific strength and specific stiffness, good damping and shock absorption, excellent machining performance, stable parts size, and easy recycling. It has great potential in aviation, aerospace, automotive and other industries. potential application value. At present, magnesium alloys are mainly cast magnesium alloys and die-cast magnesium allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32G01N3/06
Inventor 王文先闫志峰张红霞崔泽琴丁敏马丽莉
Owner TAIYUAN UNIV OF TECH
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