In situ neutron diffraction measurement of strain relaxation in welds during heat treatment

被引：7

作者：

Alipooramirabad, Houman ^{[1
]}

Paradowska, Anna ^{[2
]}

Lavigne, Olivier ^{[1
]}

Ghomashchi, Reza ^{[1
]}

Reid, Mark ^{[2
]}

机构：

[1] Univ Adelaide, Sch Mech Engn, Adelaide, SA 5005, Australia

[2] ANSTO, Bragg Inst, Lucas Heights, NSW, Australia

来源：

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2017年 / 22卷 / 06期

关键词：

In situ neutron diffraction; PWHT; residual stress; microstructural characterisation; HSLA steel; strain relaxation; EBSD; hardness; RESIDUAL-STRESS; STEEL-PIPE; MULTIPASS WELDS;

D O I：

10.1080/13621718.2016.1263437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron diffraction (ND) is commonly used to investigate the stress redistribution before and after post-weld heat treatment (PWHT) in welded structures. However, there is a lack of information on the evaluations of strains during PWHT. The present work employed in situ ND to measure the relaxation of residual strains during conventional PWHT in multi-pass high-strength low-alloy steel welds. It was found that strain relaxation occurs principally during the heating stage of the heat treatment. The findings have important economic bearings and can be used to characterise comparable material combinations and optimise the PWHT process for high-strength low-alloy weld joints. This unique information also provides a valuable benchmark for the finite element modelling of this complex process.

引用

页码：484 / 495

页数：12

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