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,2020,49(6):1938~1945.[Jin-na Liu,Hai-dou Wang,Zhi-guo Xing,Bin-shi Xu,Xiu-fang Cui,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.]
基于纳米动力学分析的钛薄膜力学行为和疲劳性能研究
投稿时间:2019-03-13  修订日期:2019-06-24
中文关键词:  钛薄膜  疲劳  纳米压痕  纳米级动态载荷分析  残余应力
基金项目: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).
中文摘要:
      利用纳米压痕试验研究了不同厚度钛薄膜的力学行为和疲劳性能。在纳米级动态力学分析的基础上,根据储存刚度的变化定量计算了薄膜的疲劳寿命。结果表明,薄膜的疲劳寿命与残余应力有显著的关系。压痕原位扫描图像显示,薄膜出现明显堆积分层,长裂纹从压头中心向压头边缘垂直延伸。而且,压痕周围积累了大量的应力,纳米级动态加载过程产生了高度局域化的塑性变形和应力释放。薄膜内部的残余压应力将抵消部分载荷应力,提高薄膜的疲劳寿命。
Nanoscale Dynamic-Mechanical-Analysis Characterization of the Mechanical Behavior and Fatigue Property for Ti Films
英文关键词:Ti film  Fatigue  Nanoindentation  Nanoscale Dynamic-Mechanical-Analysis  Residual stress
英文摘要:
      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.
作者单位E-mail
刘金娜 哈尔滨工程大学 ljn880217@163.com 
王海斗 陆军装甲兵学院 wanghaidou@aliyun.com 
邢志国 陆军装甲兵学院  
徐滨士 陆军装甲兵学院  
崔秀芳 哈尔滨工程大学  
金国 哈尔滨工程大学  
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