Two-dimensional mapping of residual stresses in a thick dissimilar weld using contour method, deep hole drilling, and neutron diffraction

被引：0
作者：
Wanchuck Woo
Gyu Baek An
Christopher E. Truman
Wenchun Jiang
Michael R. Hill
机构：
[1] Korea Atomic Energy Research Institute,Neutron Science Division
[2] Chosun University,Department of Naval Architecture & Ocean Engineering
[3] University of Bristol,Department of Mechanical Engineering
[4] University of Petroleum,College of Chemical Engineering
[5] University of California,Department of Mechanical and Aerospace Engineering
来源：
Journal of Materials Science | 2016年 / 51卷
关键词：
Residual Stress; Ferritic Steel; Residual Stress Measurement; Contour Method; Weld Centerline;
D O I：
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中图分类号：
学科分类号：
摘要：
Residual stress variations were determined through the thickness of a 70-mm-thick ferritic–austenitic dissimilar steel weld using contour method, deep hole drilling, and neutron diffraction. The result shows that significant tensile stresses were distributed distinctly along the interface between ferritic and austenitic phases. The band of the large tensile stresses was about 8 mm wide and the magnitude reached 400 MPa, which is approaching 100 % of the yield strength of the base metal, near the top surface (about 15 % of the depth). It is attributed to the large difference (5.8 × 10−6 1/°C) of the thermal expansion coefficient between ferritic and austenitic steels of the interface. The microstructure analysis elucidates that the martensitic phase prevailed near the interface and results in microhardness increases.
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页码：10620 / 10631
页数：11
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