2823 AEと腐食電位揺動を用いた二相ステンレス鋼の環境助長割れのメカニズム(S37-1 非破壊評価とモニタリング(1),S37 非破壊評価とモニタリング)

概要

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In order to study the mechanism of environmental assisted cracking (EAC) of dual phase stainless steel: DP-3 in 42 and 35 mass% magnesium chloride solution at 90 C, simultaneous monitoring of acoustic emission (AE) and corrosion potential fluctuation (CPF) were attempted. In the 35 mass% solution, we detected vigorous AEs but no characteristic CPF. Contrary to this, RD type CPFs were frequently detected but no AEs in the 42 mass% solution. Referring the previous experimental evidence, the EAC of DP-3 steel in the 35%MgCl_2 solution was concluded to be produced by delayed fracture while that in 42 mass% MgCl_2 solution was by active-path corrosion type SCC.
社団法人日本機械学会の論文
2006-09-15