OS1211 中性子回折法による厚肉突合せ溶接試験体の残留応力測定(X線,放射光,中性子による材料・材料強度評価,オーガナイズドセッション)

概要

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In this study, residual stress distributions in transverse path in the center of wall thickness of 35 mm thick butt weld were measured using neutron diffraction technique. Measurement condition such as suitable diffraction planes and stress-free lattice constant was optimized using standard sample. It was confirmed that influence of intergranular strain was negligible on the 311 and 220 reflections in austenitic steel and on the 110, 200 and 211 reflections in ferritic steel. Trend of residual stress distributions of SUS304 butt weld and SUS304-low alloy steel (A533B) dissimilar butt weld, which were measured using 311 reflection in austenite and 211 reflection in ferrite, was different near the weidment since the dissimilar weld was affected by the misfit of thermal expansion coefficient between austenitic steel and ferritic steel.
一般社団法人日本機械学会の論文
2009-07-24