Ultrasonic non-linear detection tests for 45 steel thermal damage

被引：0

作者：

Mao H. ^{[1
]}

Qin G. ^{[1
]}

Li Q. ^{[2
]}

Yi X. ^{[2
]}

Mao H. ^{[1
]}

机构：

[1] School of Mechanical and Transportation Engineering, Guangxi University of Science and Technology, Liuzhou

[2] School of Mechanical Engineering, Guangxi University, Nanning

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2020年 / 39卷 / 21期

关键词：

45; steel; Metallographic analysis; Nonlinear ultrasonic; Thermal damage;

D O I：

10.13465/j.cnki.jvs.2020.21.037

中图分类号：

学科分类号：

摘要：

45 steel is a common material for parts manufacturing, and it is important to study its thermal damage detection for parts failure assessment.Here, in order to study ultrasonic nonlinear effects of 45 steel with different degrees of thermal damage, specimens with different degrees of thermal damage were made. Ultrasonic nonlinear detection tests were conducted for specimens using the RAM-5000 system made by RITEC company to obtain relation curves between ultrasonic nonlinear coefficients and heating temperature. These curves were deeply analyzed combining with the material's metallographic microstructure evolution laws. Results showed that the ultrasonic nonlinear coefficient of 45 steel firstly increases, then decreases and increases again with increase in heating temperature; when heating temperature reaches 600℃, the ultrasonic nonlinear coefficient begins to increase; when temperature reaches 800℃, itreaches the peak value; thenit drops sharply, this is consistent with the coherent strain state of 45 steel between 700-800℃; finally, it at 1 300℃ rebounds slightly; the correlation between variation of ultrasonic nonlinear coefficient of 45 steel and its metallographic microstructure varying provides atest basis for the ultrasonic nonlinear detection of 45 steel thermal damage and the evaluation of its metallographic microstructure change. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：279 / 283

页数：4

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