Investigations on the Portevin-Le Chatelier critical strain in an aluminum alloy

被引：38

作者：

Maziere, M. ^{[1
]}

Dierke, H. ^{[2
]}

机构：

[1] MINES ParisTech, Ctr Mat, CNRS UMR 7633, F-91003 Evry, France

[2] TU Braunschweig, Inst Phys Kondensierten Mat, Braunschweig, Germany

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2012年 / 52卷 / 01期

关键词：

Strain ageing; Stability; Portevin-Le Chatelier effect; Serrations; Finite elements;

D O I：

10.1016/j.commatsci.2011.05.039

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The critical condition for the occurrence of serrations during Portevin-Le Chatelier (PLC) effect is investigated in this work. Some experimental tensile results on an Al-Mg aluminum alloy (AA5754) are recalled. The mechanical model for strain ageing proposed by MacCormick (1989) [1] to simulate the PLC effect is described, and the critical condition usually associated to this model is discussed. This condition is shown to fail at predicting the occurrence of PLC bands in finite element (FE) simulations based on this model. An alternative loss of stability condition is proposed, which is in accordance with simulation results. This condition is used for the identification of strain ageing model parameter for Al-Mg alloy. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：68 / 72

页数：5

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