Discussion of HAZ crack initiation behaviour of mismatched welded joints

被引：0
|
作者：
Ling K. [1 ]
Huang X. [1 ]
机构：
[1] College of Materials Science and Engineering, Hefei University of Technology, Hefei
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2019年 / 40卷 / 01期
关键词：
Critical stress; Failure assessment diagram; Heat affected zone; Strength mismatch;
D O I：
10.12073/j.hjxb.2019400025
中图分类号：
学科分类号：
摘要：
For structural integrity assessment of welded joints is difficult to assess, the failure assessment diagram prediction method for the critical stress of heat affected zone crack initiation of welded joints is established by using the "tri-material" assumption model of mismatched welded joints. Based on the finite element analysis of ABAQUS software, the crack initiation in the heat affected zone of welded joint is studied. Results indicated that over-matching weld promoted the HAZ crack initiation in mismatched welded joints. HAZ strength softening promoted the HAZ crack initiation in mismatched welded joints. When M W <1,M H <1, with the increase of heat affected zone width, it promoted the HAZ crack initiation,M H >1, with the decrease of heat affected zone width, it promoted the HAZ crack initiation. WhenM W >1, whether HAZ strength softening or hardening, with the increase of heat affected zone width, they promoted the HAZ crack initiation. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
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页码：124 / 130
页数：6
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