SUS304溶接継手の550℃におけるクリープ疲労強度とそのひずみ集中による検討

概要

論文の詳細を見る
Strain controlled fatigue and creep-fatigue tests at 550℃ were carried out on two kinds of SUS304 welded joints. The results obtained are summarized as follows ; (1)Fatigue strength reduction factor of welded joints, in the case without strain holding, shows a maximum value at the strain range of 0.3%, and decreases rapidly with a decrease in strain range. (2) Creep-fatigue strength of welded joints, in the case of strain range of more than 0.5%, can be reasonably evaluated by strain concentration in a weld metal region, which is strongly affected by thermal softening and/or dynamic strain aging behaviors of weld metal and base metal. (3) Creep-fatigue strength of welded joints in a low strain range region is considerably affected by creep damage, which increases due to elastic follow-up during strain holding period.
社団法人日本材料学会の論文
1990-05-15