The fracture mechanism in 475 degrees C embrittled ferritic stainless steels

被引：12

作者：

Marrow, TJ ^{[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：

ferritic stainless steels; embrittlement at 475 degrees C; slip bands; fracture initiation; deformation twinning; brittle fracture; ductile-brittle transition;

D O I：

10.1111/j.1460-2695.1996.tb01027.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'' in age-hardened ferritic stainless steel, E-Brite and A129-4, is investigated. Experimental results for smooth tensile and notched bending fracture tests are interpreted using a finite element simulation of the stresses at fracture. Yield is characterised by profuse slip band formation. Transgranular fracture initiation is observed at slip band intersections with grain boundaries. Deformation twinning occurs during brittle fracture. Slip bands and deformation twins ale identified using lattice rotations measured with electron back-scatter diffraction patterns. Mechanisms for the ductile-to-brittle transition are discussed.

引用

页码：919 / 933

页数：15

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