通过原位声发射技术监测生物可吸收合金Mg-1Zn-0.2Ca中的动态再结晶

Monitoring Dynamic Recrystallisation in Bioresorbable Alloy Mg-1Zn-0.2Ca by Means of an In Situ Acoustic Emission Technique.

作者信息

Merson Dmitry, Linderov Mikhail, Brilevsky Alexander, Danyuk Alexey, Vinogradov Alexei

机构信息

Institute of Advanced Technologies, Togliatti State University, 445020 Togliatti, Russia.

Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, 4791 Trondheim, Norway.

出版信息

Materials (Basel). 2022 Jan 3;15(1):328. doi: 10.3390/ma15010328.

DOI:10.3390/ma15010328

PMID:35009474

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8746214/

Abstract

The tensile behaviour of the biocompatible alloy Mg-1Zn-0.2Ca (in wt.%) in the fine-grained state, obtained by severe plastic deformation via multiaxial isothermal forging, has been investigated in a wide range of temperatures (20 ÷ 300) °C and strain rates (5 × 10 ÷ 2 × 10) s with the measurements of acoustic emission (AE). The dependences of mechanical properties, including the yield stress, ultimate strength, ductility, and the strain-hardening rate, on the test temperature and strain rate, were obtained and discussed. It is shown for the first time that an acoustic emission method is an effective tool for in situ monitoring of the dynamic recrystallisation (DRX) process. The specific behaviour of the acoustic emission spectral density reflected by its median frequency as a function of strain at various temperatures can serve as an indicator of the DRX process's completeness.

摘要

通过多轴等温锻造进行剧烈塑性变形获得的细晶态生物相容性合金Mg-1Zn-0.2Ca（重量百分比），在20至300°C的宽温度范围和5×10至2×10 s的应变速率下，通过声发射（AE）测量研究了其拉伸行为。获得并讨论了包括屈服应力、极限强度、延展性和应变硬化率在内的力学性能与试验温度和应变速率的关系。首次表明声发射方法是原位监测动态再结晶（DRX）过程的有效工具。在不同温度下，由其中心频率反映的声发射光谱密度随应变的特定行为可作为DRX过程完整性的指标。