Effect of Gradient Plasticity on Crack Initiation and Propagation in the Ductile-Brittle Transition Region of Ferritic Steel

被引：1

作者：

Giang, N. A. ^{[1
]}

Kuna, M. ^{[1
]}

Huetter, G. ^{[1
]}

机构：

[1] TU Freiberg, IMFD, D-09599 Freiberg, Germany

来源：

ECF22 - LOADING AND ENVIRONMENTAL EFFECTS ON STRUCTURAL INTEGRITY | 2018年 / 13卷

关键词：

Ferritic steel; Gradient plasticity; Cell model; Cracking of carbide particle; CLEAVAGE FRACTURE INITIATION; PART I; PREDICTION; TOUGHNESS; DAMAGE;

D O I：

10.1016/j.prostr.2018.12.008

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Micro-crack initiation in ductile-brittle transition region of ferritic steel is often observed through cracking of carbides near or at ferritic grain boundary. The main reason is that the dislocation pile-up at a grain boundary induces high stresses in the carbide. This mechanism cannot be modelled by classical plasticity. In the present study, the effective gradient plasticity (scalar gradient plasticity) together with cohesive zone models is employed in a unit cell model to adress this mechanism at the microscale. (C) 2018 The Authors. Published by Elsevier B.V.

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页码：45 / 50

页数：6

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