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Test method for T-type fissure impact toughness

A technology of impact toughness and testing methods, applied in the direction of applying repeated force/pulsation force to test the strength of materials, measuring devices, instruments, etc., can solve the problems of difficult inspection of materials entering the factory, and achieve the effect of filling the technical gap

Inactive Publication Date: 2010-12-22
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this test project has not been carried out in China, and there are no executable relevant test methods and standards, it has brought certain difficulties to the incoming inspection of materials for this project.

Method used

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  • Test method for T-type fissure impact toughness
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  • Test method for T-type fissure impact toughness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The T-crack impact toughness test technology is based on the metal Charpy V-notch impact test method, adding the crack making technology, specifying the crack length measurement method, and the processing of test results.

[0041] The metal Charpy V-notch impact test method is a conventional impact toughness test method. The test sample used does not contain cracks. What is measured is the impact toughness in the V-notch state, which cannot replace the T-notch (with cracks) The impact properties of the samples.

[0042]The technical problem to be solved in this embodiment: According to the material inspection standard Q / 3B259-2002 and Q / 3B1198-2002, when the phase transition point of the material exceeds the specified temperature, it is necessary to additionally measure the impact toughness KCT of the T-notch impact specimen. Since this test project has not been carried out in China, and there are no executable relevant test methods and standards, it has brought certain...

Embodiment 2

[0090] A test method for T-shaped crack impact toughness. The content of this embodiment is basically the same as that of Embodiment 1, and its difference mainly lies in:

[0091] In the T-shaped crack impact toughness test method, the sample base material is directly subjected to the impact toughness test without heat treatment;

[0092] In the T-shaped crack impact toughness test method, the specific requirements for prefabricating fatigue cracks at the bottom of the V-shaped notch of the sample are: select the dynamic loading mode, and observe the crack expansion after the crack of the sample; when the crack reaches the required length , stop the machine; the number of cycles is required to be greater than 3000 to ensure that the crack front is straight and sharp;

[0093] In the T-crack impact toughness test method, it is also required to measure the deflection of the sample: the measurement reference standard is: for a 55 mm long standard sample, the deflection deformati...

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Abstract

A test method for T-type fissure impact toughness is characterized in that the test method for T-type fissure impact toughness comprises the following steps: manufacturing a fissure, testing the impact toughness and processing a test result. The method of the invention solves the problem that the test item cannot be solved by the prior testing standard and fills a technical gap.

Description

technical field [0001] The invention relates to the detection technology of physical and chemical properties of metal materials, and in particular provides a T-shaped crack impact toughness test method. Background technique [0002] The metal Charpy V-notch impact test method is a conventional impact toughness testing method. The test sample used does not contain cracks. What is measured is the impact toughness in the V-notch state, which cannot replace the T-notch (with cracks) The impact properties of the samples. [0003] It is stipulated in the material inspection standard Q / 3B259-2002 and Q / 3B1198-2002 that when the phase transition point of the material exceeds the specified temperature, it is necessary to supplement the impact toughness KCT of the T-notch impact specimen. Since this test project has not been carried out in China, and there are no executable relevant test methods and standards, it has brought certain difficulties to the incoming inspection of material...

Claims

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Application Information

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IPC IPC(8): G01N3/34G01B11/02G01B11/22G01B11/28
Inventor 韦廷立孙奇秦海于湃
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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