G030054 SUS316鋼のフレッティング疲労強度に及ぼす水素の影響([G03005]材料力学部門一般セッション(5):ステンレス鋼の疲労)

概要

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Fretting fatigue is one of the most important issues in design of mechanical components due to significant reduction in fatigue strength. In this study, the effect of hydrogen on the fretting fatigue strength of SUS316 was evaluated. The test specimen was received a thermal hydrogen pre-charging. The fretting fatigue strength of the hydrogen pre-charged specimen was lower than that of the uncharged specimen. The reduction of the fretting fatigue limit was less in SUS316 than in SUS304. The authors have reported that local adhesion between the contacting surfaces is one of the causes of the reduced fretting fatigue strength found in hydrogen gas. In this study, EBSD observation of the adhered part was done to promote understanding of the mechanisms. Refinement of crystal grain and strain-induced martensite structure were observed at the adhered part. The results indicated that the stress state in the vicinity of the adhered part was severer due to adhesion.
一般社団法人日本機械学会の論文
2011-09-11