Study of Luders phenomena in reactor pressure vessel steels

被引：18

作者：

Beardsmore, D. W. ^{[1
]}

da Fonseca, J. Quinta ^{[2
]}

Romero, J. ^{[2
]}

English, C. A. ^{[3
]}

Ortner, S. R. ^{[3
]}

Sharples, J. ^{[1
]}

Sherry, A. H. ^{[2
]}

Wilkes, M. A. ^{[1
]}

机构：

[1] AMEC, Warrington WA3 6GA, Cheshire, England

[2] Univ Manchester, Sch Mat, Ctr Mat Sci, Manchester M13 9PL, Lancs, England

[3] Natl Nucl Lab, PSCGS, Didcot OX11 0QJ, Oxon, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 588卷

关键词：

Mild steel; Luders strain; Notches; Plastic zone; MILD-STEEL; STRAIN; BEHAVIOR; LOCALIZATION; PROPAGATION; SIMULATION; BANDS; FLOW;

D O I：

10.1016/j.msea.2013.05.021

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We have undertaken a combined experimental and modelling study of plasticity development in samples containing notches and cracks in a reactor pressure vessel steel that exhibits the Luders phenomenon in uniaxial testing. We have used digital image correlation to study the development of plasticity in plane sided, waisted and notched samples of a mild steel that exhibits Luders behaviour. We have developed a constitutive model for use within elastic plastic finite element analyses of structural geometries made from materials which exhibit Luders strain behaviour, and validated it against experimental data. The model is capable of describing plasticity development in smooth sided, waisted and notched specimens. With the assistance of the model we have determined that Luders behaviour affects the detailed development of plasticity not only in smooth sided and waisted specimens, which is readily observed experimentally, but also in sharp notched specimens. In sharp notched specimens the plastic zone is more constrained and stress intensification higher in the presence of Luders behaviour. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.

引用

页码：151 / 166

页数：16

共 37 条

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