Interpretation of creep crack growth data for 1/2 CMV steel weldments

被引：1

作者：

Ejaz, Muneeb ^{[1
]}

Davies, Catrin M. ^{[1
]}

Dean, David W. ^{[2
]}

机构：

[1] Imperial Coll London, Dept Mech Engn, South Kensington Campus, London SW7 2AZ, England

[2] EDF Energy Generat Ltd, Barnwood GL4 3RS, Glos, England

来源：

21ST EUROPEAN CONFERENCE ON FRACTURE, (ECF21) | 2016年 / 2卷

关键词：

creep crack growth; 1/2CMV; K-mat(c); Weldments; Heat affected zone (HAZ); FAILURE ASSESSMENT DIAGRAM; INITIATION;

D O I：

10.1016/j.prostr.2016.06.116

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

1/2Cr1/2Mo1/4V (1/2CMV) steel has been used in high temperature power plant piping due to its enhanced weld properties. Creep crack growth testing has been performed on compact tension C(T) specimens of 1/2CMV (low alloy ferritic) steel at 540 degrees C on both parent metal specimens as well as fine and coarse grained heat affected zone (HAZ) specimens, where the initial crack is located within the HAZ. The data has been interpreted using the fracture mechanics parameter C* against the crack growth rate. The creep toughness parameter, K-mat(c), is also evaluated for the material. It was seen that, for a given C* value, the fine grained HAZ material generally exhibits higher crack growth rates than the post weld heat treated coarse grained HAZ. Copyright (C) 2016 The Authors. Published by Elsevier B.V.

引用

页码：903 / 910

页数：8

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