Deformation mechanism in a twin-roll cast AA5754 alloy

被引：0

作者：

Malek, P. ^{[1
]}

Turba, K. ^{[1
]}

Slamova, M. ^{[2
]}

机构：

[1] Charles Univ Prague, Fac Math & Phys, Dept Phys Mat, CZ-12116 Prague, Czech Republic

[2] Res Inst Met Ltd, Panenske Brezany 25070, Odolena Voda, Czech Republic

来源：

KOVOVE MATERIALY-METALLIC MATERIALS | 2008年 / 46卷 / 05期

关键词：

AA5754; sheet; twin-roll casting; grain boundary sliding; atomic force microscopy; cavitation;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Various deformation mechanisms may contribute to the high temperature plastic deformation of twin-roll cast AlMg3 (AA5754) sheets. The evaluation of the strain rate sensitivity parameter m suggested that grain boundary sliding, which is generally responsible for superplastic behaviour, might be operating at certain temperature and strain rate conditions. The investigation of the surface relief of samples strained at various deformation conditions was carried out using atomic force microscopy. Both grain boundary sliding and dislocation slip were observed. Grain boundary sliding was accompanied by intensive cavitation that prevented the material from reaching superplastic values of ductility.

引用

页码：269 / 276

页数：8

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