Portevin-Le Chatelier type plastic instabilities in depth sensing macro-indentation

被引：9

作者：

Kovács, Z ^{[1
]}

Chinh, NQ ^{[1
]}

Lendvai, J ^{[1
]}

Vörös, G ^{[1
]}

机构：

[1] Eotvos Lorand Univ, Dept Gen Phys, H-1518 Budapest, Hungary

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2002年 / 325卷 / 1-2期

关键词：

Portevin-Le Chatelier effect; depth-sensing indentation; load control;

D O I：

10.1016/S0921-5093(01)01445-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Depth-sensing indentation at constant loading rate was applied to investigate the Portevin-Le Chatelier effect. Comparison of the different testing methods was achieved using representative strain and stress quantities. The depth of the dynamic strain ageing shows a good coincidence for Vickers and conical indentations, and for the large strain region of the tension tests. Tests with cylindrical indenters and tension experiments show a transient and a stationary behaviour for small and for large strains, respectively. The transient part can be interpreted by taking into account the free-flight time of dislocations in the Kubin-Estrin model. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：255 / 260

页数：6

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