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USP処理した異材溶接継手の熱負荷前後における残留応力マッピング

Residual stress mapping on ultrasonic shot peened dissimilar weld joint before- and after- thermal loading

秋田 貢一; 鈴木 裕士; 西川 聡*; 大北 茂*

Akita, Koichi; Suzuki, Hiroshi; Nishikawa, Satoru*; Okita, Shigeru*

超音波ショットピーニングを施した異材溶接継手の熱負荷前後における表面及び内部の残留応力分布を、X線と中性子回折によって測定した。結果をもとに、熱負荷による残留応力緩和機構を検討した。

Residual stresses on the surface and inside of ultrasonic shot peened dissimilar weld joint were measured using X-ray and neutron diffraction before and after thermal loading. Mechanism of residual stress relaxation due to thermal loading was discussed.

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