THE INFLUENCE OF SPECIMEN GEOMETRY ON THE PORTEVIN-LECHATELIER EFFECT IN AN AL-MG ALLOY

被引：38

作者：

ROBINSON, JM

SHAW, MP

机构：

[1] Department of Materials Engineering, University of Cape Town, Rondebosch

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1992年 / 159卷 / 02期

关键词：

D O I：

10.1016/0921-5093(92)90284-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The nature of stress-strain discontinuities and surface deformation markings, in an aluminium-magnesium alloy known to exhibit serrated flow associated with dynamic strain ageing (DSA), has been investigated as a function of specimen geometry during tensile deformation. It is demonstrated that specimen shape and size can significantly influence both the type of deformation bands observed as well as the characteristics of the flow serrations when Portevin-Le Chatelier (PLC) bands are produced. The observations are discussed in terms of criteria that determine the transition from plane stress to plane strain loading conditions and the implications for interpretation of data used to identify specific categories of serrated flow are considered.

引用

页码：159 / 165

页数：7

共 23 条

[1] ACOUSTIC-EMISSION AND DEFORMATION BANDS IN AL-2.5-PERCENT MG AND CU-30-PERCENT ZN [J].