Characteristics of the propagating deformation bands associated with the Portevin-Le Chatelier effect in an Al-Zn-Mg-Cu alloy

被引：28

作者：

Thevenet, D ^{[1
]}

Mliha-Touati, M ^{[1
]}

Zeghloul, A ^{[1
]}

机构：

[1] Univ Metz, Mecan & Phys Mat Lab, UMR 7554, CNRS, F-57045 Metz 01, France

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 291卷 / 1-2期

关键词：

Portevin-Le Chatelier effect; deformation bands; plastic instability; experimental work; precipitation; ageing; aluminium-zinc-magnesium alloys;

D O I：

10.1016/S0921-5093(00)00988-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Measurements were performed on deformation bands in an Al-Zn-Mg-Cu alloy associated with the Portevin-Le Chatelier effect occurring at room temperature upon deformation in a soft tensile machine. The effects of ageing time and ageing temperature up to 200 degrees C on the features of propagating bands were investigated. These experiments establish the important influence of precipitation on serrated flow. In particular, the band velocity V-b, the band width L-b and the band strain epsilon(b) were examined. The evolution of the onset strain of bursts, epsilon(c), was also studied. Finally, experimental values were confronted to Hahner's model. (C) 2000 Published by Elsevier Science S.A.

引用

页码：110 / 117

页数：8

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