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A method and device for evaluating the mechanical properties of metals using ultrasonic cavitation

An ultrasonic transducer, metal technology, applied in measuring devices, testing material strength using a single impact force, scientific instruments, etc., can solve problems such as unfavorable batch testing work.

Active Publication Date: 2021-06-15
CHONGQING MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The strength and plasticity, hardness, impact toughness and fatigue strength of metal materials are common mechanical properties in the field of mechanical processing. Various mechanical properties need to be measured by different tests, such as room temperature tensile test, shear test, fatigue test, etc. This kind of scattered mechanical property test method is not conducive to the development of batch test work
In addition, there are more and more reports on the uncertainty assessment of conventional mechanical performance testing of metallic materials [see "Heavy Casting & Forging", vol. Scientificity presents serious challenges

Method used

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  • A method and device for evaluating the mechanical properties of metals using ultrasonic cavitation
  • A method and device for evaluating the mechanical properties of metals using ultrasonic cavitation
  • A method and device for evaluating the mechanical properties of metals using ultrasonic cavitation

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Embodiment 1

[0047] The operation steps of this embodiment are as follows:

[0048] 1) Prepare degassed water, inject water into the pressurized cabin and remove air bubbles on the inner surface of the ultrasonic transducer;

[0049] 2) Cut copper and nickel into Ф10mm×1mm thin slice samples (the sample is a cylinder with a diameter of 10mm and a thickness of 1mm) by electric spark cutting technology, and firstly use 3000-mesh sandpaper to hand-grind the cross-cut to the naked eye Recognizable smoothness, and then surface polishing in the corresponding electrolyte of copper and aluminum;

[0050] 3) Fix the polished copper sheet and nickel sheet on the tooling, expose the end of the optical fiber and stick it parallel to the surface of the sample, then put the tooling horizontally into the ultrasonic transducer, close the pressurized chamber, and fill it with water;

[0051]4) Start the driving device of the transducer, connect the high-speed camera system (the shooting frame rate is 3000...

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PUM

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Abstract

The invention provides a method and device for evaluating metal mechanical properties by ultrasonic cavitation, the method comprising the following steps: 1) preparing degassed water, injecting water into a pressurized cabin and removing air bubbles on the inner surface of an ultrasonic transducer; 2) Cut the metal to be detected into thin slice samples; 3) Fix the metal flake sample in the ultrasonic transducer, stick the optical fiber parallel to the surface of the metal sample, and fill it with water; 4) Start the driving device of the transducer and connect it to the high-speed camera system ; 5) Determine the position of the focal point and the optimum operating frequency of the ultrasonic transducer, adjust the position of the sample so that the focal point is located on its surface; 6) shoot the cavitation process of the metal through high-speed video; 7) observe the surface damage morphology of the metal, Combined with the physical properties of the metal to evaluate its mechanical properties. The invention adopts the method of acoustic cavitation to evaluate the mechanical properties of the metal from the perspective of metal surface morphology, which has the advantages of science and convenience, and has great theoretical and application value for exploring the mechanical constitutive relationship of the metal.

Description

technical field [0001] The invention relates to the field of evaluation and characterization of mechanical properties of metal materials, in particular to a method and device for evaluating the mechanical properties of metals by ultrasonic cavitation. Background technique [0002] The strength and plasticity, hardness, impact toughness and fatigue strength of metal materials are common mechanical properties in the field of mechanical processing. Various mechanical properties need to be measured by different tests, such as room temperature tensile test, shear test, fatigue test, etc. This kind of scattered mechanical property test method is not conducive to the development of batch test work. In addition, there are more and more reports on the uncertainty assessment of conventional mechanical performance testing of metallic materials [see "Heavy Casting & Forging", vol. Scientificity presents serious challenges. Therefore, it is imperative to propose a new method for evalua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/30G01N3/307G01N3/06G01N17/00
CPCG01N3/068G01N3/30G01N3/307G01N17/006G01N2203/0044G01N2203/0055G01N2203/0282G01N2203/0647
Inventor 张玉荣李发琪李桦楠王智彪张明军曾德平
Owner CHONGQING MEDICAL UNIVERSITY
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