STUDY OF ACOUSTIC EMISSION DURING DEFORMATION OF MAGNESIUM ALLOY

被引：0

作者：

Papirov, I. I. ^{[1
]}

Stoev, P. I. ^{[1
]}

Pikalov, A. I. ^{[1
]}

Emlyaninova, T. G. ^{[1
]}

机构：

[1] Natl Sci Ctr, Kharkov Inst Phys & Technol, Akad Skaya St 1, UA-61108 Kharkov, Ukraine

来源：

EAST EUROPEAN JOURNAL OF PHYSICS | 2015年 / 2卷 / 01期

关键词：

magnesium alloys; compression; mechanical properties; acoustic emission; deformation mechanisms;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Acoustic emission (AE) of magnesium alloy WE 43 in process to compress was studied. Typical grain size of alloy was between 3-25 microns. AE parameters (activity, total number of impulses, average amplitude) were analyzed in correlation with deformation curves. It was shown that yield stress at compressing WE43 alloy with different grain size is in good agreement with Hall-Petch relationship. Acoustic emissions started at stress significantly lower than macroscopic yield stress. Maximum of curve activity AE coincide to the value of macroscopic yield stress. The increase of grain size leads to the both rise of AE activity so and average amplitude impulse. The increase of number of high-amplitude signals in spectrum AE was detected also. It was suggested that the rising share of high-amplitude impulses in spectrum AE with grain growth was associated with increase in the numbers of starts moving pile-ups of dislocations and twinning in individual grains.

引用

页码：63 / 70

页数：8