Fatigue performance of superelastic NiTi near stress-induced martensitic transformation

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• 作者：Eduardo Alarcon^a ; ^b ; Luděk Heller^b ; ^{heller@fzu.cz} ; Shabnam Arbab Chirani^a ; Petr &Scaron ; ittner^b ; Jarom&iacute ; r Kopeček^b ; Luc Saint-Sulpice^a ; Sylvain Calloch^c
• 关键词：Shape memory alloys ; Nitinol ; Superelasticity ; Martensitic transformation ; Fatigue
• 刊名：International Journal of Fatigue
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：95
• 期：Complete
• 页码：76-89
• 全文大小：4685 K
• 卷排序：95

文摘

Fatigue of NiTi drops to 104 cycles before reaching martensitic transformation. Early crack nucleation and fast crack growth occurs in NiTi even at low strains. R-phase improves the low cycle fatigue of NiTi as it acts as a stress reliever. Martensitic transformation is triggered at the crack advancing in superelastic NiTi. Transformation strains provide additional driving force for crack opening.