The fracture mechanism of 475 degrees C embrittlement in a duplex stainless steel

被引：12

作者：

Marrow, TJ ^{[1
]}

Harris, C ^{[1
]}

机构：

[1] UNIV MANCHESTER,MANCHESTER M1 7HS,LANCS,ENGLAND

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1996年 / 19卷 / 07期

关键词：

duplex stainless steel; embrittlement at 475 degrees C; brittle fracture initiation; deformation twins; ductile/brittle transition; age-hardening;

D O I：

10.1111/j.1460-2695.1996.tb01028.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The mechanism of ''475 degrees C embrittlement'' of a duplex stainless steel was investigated using finite element modelling of the stress distribution at brittle fracture initiation. Brittle fracture initiated at a critical shear stress, which increased with ferrite hardness. The fracture stress was affected by the duplex microstructure. Fracture was nucleated by deformation twins, which were identified using electron backscatter diffraction. The ductile-to-brittle fracture transition was sensitive to age-hardening and could be described simply by the effect of age-hardening and test temperature on the yield stress.

引用

页码：935 / 947

页数：13

共 35 条

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