SUS 316 鋼の長時間応力リラクゼーション特性

概要

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The understanding of stress relaxation behavior is important to evaluate the safety and reliability of structural materials used in high temperature plants. In this study, the long-term stress relaxation behavior was investigated for SUS 316 stainless steel at 500℃to 750℃, The residual stress gradually increased in the stress relaxation test below 550℃. On the other hand, the residual stress rapidly decreased after testing for I 000 to 3000hr above 600℃. The increase of residual stress at 550℃was caused by thermal densification due to the drop of carbon content in matrix accompanying the precipitation of carbide. The rapid decrease of residual stress at 650℃ was caused by lowering of creep resistance due to the drop of Mo content in matrix accompanying the precipitation of Laves phase.
社団法人日本材料学会の論文
1987-02-15