材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
中性子回折によるソケット溶接継手の残留応力の測定
林 眞琴石渡 雅幸皆川 宣明舩橋 達
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1995 年 44 巻 507 号 p. 1464-1469

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Neutron diffraction measurements of lattice spacings provide the spatial map of residual stress near welds in ferritic steel socket joints. The high tensile stress greater than 200MPa was found in the fusion and heat-affected zones in the hoop direction. However, the highest tensile stress in the axial direction at the weld root was about 110MPa relatively lower than the expected value from the fatigue test results. The balancing compressive stress was found near the surface of the socket weld fusion zone. Heat treatment at 625°C for 2 hours was sufficient for the relief of residual stress in socket welds.

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