Applicability evaluation of x-ray stress measurement at weld metal of austenitic stainless steel based on dependence of crystal grain coarsening on welding conditions

被引:0
作者
Okano S. [1 ]
Tokumaru H. [1 ]
Mochizuki M. [1 ]
机构
[1] Graduate School of Engineering, Osaka Univ, Yamada-oka, Suita
关键词
Austenitic stainless steel; Crystal grain coarsening; Weld metal; Welding conditions; X-ray stress measurement;
D O I
10.2472/jsms.68.318
中图分类号
学科分类号
摘要
This study examines the effect of welding conditions on the applicability of X-ray stress measurement at weld metal with coarsened grains. Testing material was low carbon austenitic stainless steel and 15 welded specimens were prepared through tungsten inert gas (TIG) welding under various welding conditions, in which five kinds of welding currents and three kinds of welding speeds were assigned in all combinations. In the X-ray stress measurement, 2?-sin2 method was applied and then the effectiveness of enlarging a diameter of collimator and applying additional planer oscillation for weld metal with coarsened grains was evaluated. Meanwhile, the effect of welding conditions on crystal grain coarsening at weld metal was examined based on welding thermal conduction theory with a moving point heat source. The results showed that the mean crystal grain size at weld metal correlated linearly with the parameter derived from the welding thermal conduction theory. Based on relation between X-ray irradiation area and the mean crystal grain size, the effect of the welding conditions on the applicability of X-ray stress measurement with or without enlarging a diameter of collimator and applying additional planer oscillation was systematically evaluated. © 2019 Society of Materials Science Japan. All rights reserved.
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页码:318 / 324
页数:6
相关论文
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