Influence of Prestrain on the Occurrence of PLC Effect in an Al-Mg Alloy

被引：0
|
作者：
Manach, P. Y. [1 ]
Coer, J. [1 ]
Laurent, H. [1 ]
Bernard, C. [1 ]
Thuillier, S. [1 ]
机构：
[1] Univ Bretagne Sud, LIMATB, EA 4250, F-56100 Lorient, France
来源：
NUMISHEET 2014: THE 9TH INTERNATIONAL CONFERENCE AND WORKSHOP ON NUMERICAL SIMULATION OF 3D SHEET METAL FORMING PROCESSES: PART A BENCHMARK PROBLEMS AND RESULTS AND PART B GENERAL PAPERS | 2013年 / 1567卷
关键词：
Portevin-Le Chatelier effect; Aluminium alloy; Cyclic shear tests; Bauschinger effect; PLASTIC ANISOTROPY; SIMPLE SHEAR; STRAIN; SHEETS;
D O I：
10.1063/1.4850006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present work, the jerky flow in an Al-Mg alloy during simple shear tests for various strain paths and temperatures is studied. Direct observations of the sample surface using digital image correlation is used to investigate the type and the dynamics of Portevin-Le Chatelier (PLC) bands as a function of shear strain and temperature. The influence of strain path changes on the occurrence of PLC effect is evidenced through cyclic shear tests, composed of a loading up to several values of the shear strain followed by a reloading in the opposite direction. It is shown that the occurrence of PLC effect modifies the transient behavior after strain path changes.
引用
收藏
页码：428 / 432
页数：5
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