Notch fatigue behavior of Ti-6Al-4V alloy in transition region between low and high cycle fatigue

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• 作者：Aye Thant Htoo^a ; Yukio Miyashita^b ; Yuichi Otsuka^c ; Yoshiharu Mutoh^c ; ^{mutoh@mech.nagaokaut.ac.jp} ; Shigeo Sakurai^c
• 关键词：Notch fatigue ; Local stress ratio ; Transition region ; FEM ; Fatigue life prediction
• 刊名：International Journal of Fatigue
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：95
• 期：Complete
• 页码：194-203
• 全文大小：1983 K
• 卷排序：95

文摘

S-N curve obtained under displacement-controlled low cycle fatigue test was deflected. Local stress ratio at the notch decreased with increasing strain or stress amplitude. The region of local stress ratio variation was defined as the transition region. Mechanisms of local stress ratio variation at notch root have been discussed. Fatigue life prediction method in transition region was proposed.