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Comparative test block for ultrasonic testing of structure uniformity of composite materials and preparation method thereof

A composite material and comparison test block technology, which is applied in the preparation of test samples, material analysis using sonic/ultrasonic/infrasonic waves, and material analysis, etc. The effect of judgment and omission

Inactive Publication Date: 2018-06-05
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, when using ultrasonic non-destructive detection of pores and cracks in particle-reinforced metal matrix composite blanks, the ultrasonic detection method of conventional metals is usually used, and the application is good; however, particle segregation is a unique defect type of particle-reinforced metal matrix composites, which cannot Borrowing conventional metal detection methods for ultrasonic testing, there is no public report on the use of comparative test blocks to detect the uniformity of particle distribution in ultrasonic testing

Method used

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  • Comparative test block for ultrasonic testing of structure uniformity of composite materials and preparation method thereof
  • Comparative test block for ultrasonic testing of structure uniformity of composite materials and preparation method thereof
  • Comparative test block for ultrasonic testing of structure uniformity of composite materials and preparation method thereof

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Embodiment 1

[0033] The comparative test block used for ultrasonic detection of the microstructure uniformity of SiC particle reinforced aluminum matrix composites with a volume fraction of 15% is a cuboid test block with a length, width and height of 200mm, 100mm and 300mm respectively, and four diameters in the test block are The depth of the 5mm cylinder area from the upper surface of the test block is 200mm, and the height is 2-3mm. The roughness of the upper and lower surfaces of the test block reaches Ra1.6; The volume fractions of SiC particles in the regions are 25%, 35%, 45%, and 55%, respectively.

[0034] The preparation method of described contrast test piece, comprises the following steps:

[0035] (1) Calculate, weigh, and evenly mix SiC particles and Al alloy powder to obtain a mixed powder with a volume fraction of 15% SiC particles and 85% Al alloy powder, and put it into a rubber sheath for compaction and flattening to obtain a cuboid-shaped composite material Body blank...

Embodiment 2

[0044] The comparative test block used for ultrasonic detection of the uniformity of the copper matrix composite material with a volume fraction of 60% WC particles is a cuboid test block with a length, width, and height of 100mm, 100mm, and 15mm, respectively. The four diameters in the test block are The depth of the 2mm cylinder area from the upper surface of the test block is 10mm, and the height is 1-2mm. The roughness of the upper and lower surfaces of the test block reaches Ra1.6; the test block body is 60% WC particle reinforced copper matrix composite material, 4 cylinders The volume fractions of WC particles in the regions were 20%, 30%, 40%, and 50%, respectively.

[0045] The preparation method of described contrast test piece, comprises the following steps:

[0046] (1) Calculate, weigh, and evenly mix WC particles and Cu alloy powder to obtain a mixed powder with a volume fraction of 60% WC particles and 40% Cu alloy powder, and put it into a rubber sheath to tamp...

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Abstract

The invention belongs to the technical field of ultrasonic non-destructive testing of composite materials, and in particular relates to a comparative test block for ultrasonic testing of structure uniformity of the composite materials and a preparation method of the comparative test block. The comparative test block is formed through internally placing the composite materials which are different in volume fractions with body materials in different areas of particle reinforced metal matrix composite body materials, and mainly prepared by adopting cold isostatic pressing, hot isostatic pressingand machining; an ultrasonic detector is used for testing the test block, so that testing waveform diagrams in different volume fraction areas of particles can be obtained, in the actual composite material testing, a testing result is compared with a comparative test block map and combined with the theoretical calculation, and the particle segregation degree inside the composite materials can be known; the comparative test block provided by the invention provides true and effective contrast and evaluation standards for ultrasonic testing of the structure uniformity of the composite materials to improve the testing efficiency.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic non-destructive testing of composite materials, in particular to a comparison test block and a preparation method for ultrasonic testing of composite material tissue uniformity. Background technique [0002] Particle-reinforced metal matrix composites have the characteristics of high specific stiffness, specific strength, good toughness and fatigue resistance. At present, this material has been widely used in high-tech fields such as aviation and aerospace. The internal structure of particle-reinforced metal matrix composites directly affects the material properties. At present, there are four types of common structural defects: pores, cracks, inclusions, and uneven particle distribution. For the first three types of defects, the defects can be reduced or even eliminated by adjusting the process. However, the uneven distribution of ceramic particles in the matrix is ​​difficult to avoid. There...

Claims

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Application Information

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IPC IPC(8): G01N29/30G01N1/28
CPCG01N1/286G01N29/30G01N2001/2893
Inventor 杨必成聂俊辉马自力刘彦强左涛樊建中
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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