Influence of Low-Temperature Hydrogen Degassing on Hydrogen-Induced Disbonding of Cladding

概要

論文の詳細を見る
The behaviour of hydrogen-induced disbonding of austenitic stainless steel cladding was investigated. The specimen was taken from heavy section 2 1/4Cr-lMo steel plate weld-clad using a 75 mm wide type 309 strip and a 150 mm wide type 347 strip. It was heated at 455℃ in an autoclave containing high pressure H_2 for hydrogen charging, and reheated to Judy cracking appearance behaviour. The results indicate that (1) delayed cracking occurs at or near room temperature when the specimen is rapidly cooled from hydrogen charging temperature but it cannot occur above 100℃, (2) this type of cracking takes place in grain boundaries of cladding adjacent to the fusion line, (3) the susceptibility to cracking decreases by application of post-heating or by reducing the rate of cooling after hydrogen charging, (4) numerical analysis applied to hydrogen distribution may explain the susceptibility to cracking.
社団法人溶接学会の論文
1985-04-01