Method and device for evaluating metal mechanical properties by ultrasonic cavitation

Abstract

The invention provides a method and device for evaluating metal mechanical properties by ultrasonic cavitation. The method comprises the following steps of (1) preparing de-aerated water; injecting water into a pressurization cabin, and removing bubbles of the inner surface of an ultrasonic transducer; (2) cutting metal to be detected into slice samples; (3) fixing the metal slice samples in the ultrasonic transducer; parallelly sticking optical fiber on the metal sample surface; fully injecting water; (4) starting a driving device of the transducer; connecting a high-speed image pick-up system; (5) determining the focus position and the optimal work frequency of the ultrasonic transducer; regulating the position of the sample so that the focus is positioned on the surface; (6) shooting the metal cavitation erosion process through high-speed image pickup; (7) observing the metal surface damage appearance, and evaluating the mechanical property by combining the metal physical property.The metal mechanical property is evaluated from the metal surface topography angle by an acoustic cavitation method; the advantages of science and convenience are realized; important theoretical and application values are realized for studying the metal mechanical constitutive relationship.

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...

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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

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