Interaction Between Local Plastic Strain and Multi-Scale Fatigue Crack Propagation Behavior in Titanium Alloy TC4

摘要：

　　Multi-scale Fatigue crack growth behavior of titanium alloy TC4 under different maximum stress was identified in the present work by using an in-situ fatigue testing system.Results showed that specimen tested at lower maximum stress exhibited longer fatigue life,since the small fatigue crack stage accounted for a larger fraction of the total fatigue life.Local deformation around fatigue crack was measured by digital image correlation (DIC) technique.The evolution of multi-scale fatigue crack was identified.Relationship between size of plastic zone and crack growth rate was identified.

关键词： Multi-scale fatigue crack Titanium alloy Crack growth rate Digital image correlation

作者: Shen Ye Xian-Cheng Zhang Shan-Tung Tu

作者单位: Key Laboratory of Pressure Systems and Safety,Ministry of Education,School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,P.R.China

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 51-56

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）