B-42 ウォータジェットピーニングによる超小口径管内面の残留応力改善方法の開発

概要

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As one of degradation conditions on components used in water, overlapping environment, material and stress might cause stress corrosion cracking (SCC). Especially, for the tensile residual stress produced by welding, it is particularly effective to reduce the tensile residual stress on the material surface to prevent SCC. In this paper, the residual stress improvement method using cavitation impact generated by a water jet, called Water Jet Peening, has been developed for the maintenance technology for the inner surfaces of small-diameter Alloy 600 pipes. As the results, for the inner surface of Alloy 600 pipes (ID : 10-15mm), we confirmed to be able to reduce to compressive stress on surface by about -350MPa and in depth by about 0.5mm.
一般社団法人日本機械学会の論文
2000-03-29