Specific features of acoustic emission of Ti alloys under plastic strain and fracture

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019 Pub Date : 2019-11-19 DOI:10.1063/1.5131937

A. A. Dmitriev, V. Polyakov

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引用次数: 1

Abstract

This paper investigates acoustic emission of annealed and unannealed Ti alloys under static tension. Unannealed Ti alloys have three distinctive AE peaks related to different stages of strain hardening. There is a significant difference in AE signal form and two peaks for annealed Ti alloys. Discrete wavelet transform is used to analyze the measured acoustic emission peaks quantitatively. Calculated informative parameters of acoustic emission allow establishing the relation between acoustic emission and mechanisms of plastic strain and rupture under loading of Ti alloy. Obtained results can be used to analyze acoustic emission testing results of Ti alloys.This paper investigates acoustic emission of annealed and unannealed Ti alloys under static tension. Unannealed Ti alloys have three distinctive AE peaks related to different stages of strain hardening. There is a significant difference in AE signal form and two peaks for annealed Ti alloys. Discrete wavelet transform is used to analyze the measured acoustic emission peaks quantitatively. Calculated informative parameters of acoustic emission allow establishing the relation between acoustic emission and mechanisms of plastic strain and rupture under loading of Ti alloy. Obtained results can be used to analyze acoustic emission testing results of Ti alloys.

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钛合金在塑性应变和断裂下的声发射特性

本文研究了静张力下退火和未退火钛合金的声发射特性。未退火钛合金在不同的应变硬化阶段有三个不同的声发射峰。退火Ti合金的声发射信号形式存在显著差异，存在两个峰。采用离散小波变换对实测声发射峰进行定量分析。通过计算声发射信息参数，建立了钛合金在载荷作用下的声发射与塑性应变和断裂机理之间的关系。所得结果可用于分析钛合金的声发射测试结果。本文研究了静张力下退火和未退火钛合金的声发射特性。未退火钛合金在不同的应变硬化阶段有三个不同的声发射峰。退火Ti合金的声发射信号形式存在显著差异，存在两个峰。采用离散小波变换对实测声发射峰进行定量分析。通过计算声发射信息参数，建立了钛合金在载荷作用下的声发射与塑性应变和断裂机理之间的关系。所得结果可用于分析钛合金的声发射测试结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019

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