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刘金娜,王海斗,邢志国,徐滨士,崔秀芳,金国.基于纳米动力学分析的钛薄膜力学行为和疲劳性能研究[J].稀有金属材料与工程(英文),2020,49(6):1938~1945.[Jin-na Liu,Hai-dou Wang,Zhi-guo Xing,Bin-shi Xu,Xiu-fang Cui and Guo Jin.Nanoscale Dynamic-Mechanical-Analysis Characterization of the Mechanical Behavior and Fatigue Property for Ti Films[J].Rare Metal Materials and Engineering,2020,49(6):1938~1945.]
Nanoscale Dynamic-Mechanical-Analysis Characterization of the Mechanical Behavior and Fatigue Property for Ti Films
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Received:March 13, 2019  Revised:June 24, 2019
DOI:
Key words: Ti film  Fatigue  Nanoindentation  Nanoscale Dynamic-Mechanical-Analysis  Residual stress
Foundation item:国家自然科学基金(51535011, 51705095, 51775554), 国家基础研究计划 (973 项目) (No. 61328303), 黑龙江省博士后科研发展基金 (LBH-Q18036), 黑龙江省自然科学基金联合引导项目(LH2019E031), 中央高校基础研究基金 (HEUCF 3072019CF1010).
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Jin-na Liu,Hai-dou Wang,Zhi-guo Xing,Bin-shi Xu,Xiu-fang Cui and Guo Jin  
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Abstract:
      The mechanical behavior and the fatigue property of Ti films with different thickness were investigated by nanoindentation test. The fatigue property of the films was quantitatively calculated according to the changes of storage stiffness under the nanoscale dynamic mechanical analysis. The results showed that the fatigue life of the films depends on the residual stress remarkably. In situ scanning images showed the thin film was significantly stacked and layered, and long cracks radiated from the center of the indenter perpendicular to the indenter edge. Additionally, there was a sizable pile up around the indentions which demonstrated that a highly localized plastic deformation and stress release occurred in the process of the nanoscale dynamic loading process. The existence of the internal compressive residual stress will offset part of the load stress to improve the fatigue life of films.