摘要
The effects of strength mis-matching on J-integral and failure assessment line (FAL) of electron beam welded thick TC4-DT titanium alloy joints have been investigated.Elastic and elastic-plastic finite elements (FE) calculations on centre crack tensile (CCT) specimens were made,and the condition of 20% strength mis-matching was considered.The results indicate that the limit load of the joint can be substituted by that of the base metal.The error of substitution is less than 5%.The failure assessment lines for both over-matching and under-matching joints are increasingly close to that of the base metal,with the ratio of weld width to specimen width (H/W) decreasing.Moreover,the failure assessment lines of the joints can be devised using the stress-strain curves of the base metal,which will be convenient for the practical application of engineering
The effects of strength mis-matching on J-integral and failure assessment line (FAL) of electron beam welded thick TC4-DT titanium alloy joints have been investigated.Elastic and elastic-plastic finite elements (FE) calculations on centre crack tensile (CCT) specimens were made,and the condition of 20% strength mis-matching was considered.The results indicate that the limit load of the joint can be substituted by that of the base metal.The error of substitution is less than 5%.The failure assessment lines for both over-matching and under-matching joints are increasingly close to that of the base metal,with the ratio of weld width to specimen width (H/W) decreasing.Moreover,the failure assessment lines of the joints can be devised using the stress-strain curves of the base metal,which will be convenient for the practical application of engineering structures
作者
Lu Wei1,Shi Yaowu1,Li Xiaoyan1,Lei Yongping1,Gong Shuili2,Guan Qiao2,Zhao Haiyan3 1 College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China2 Science and Technology on Power Beam Processes Laboratory,Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100124,China3 Dept of Mechanical Engineering,Tsinghua University,Beijing 100084,China
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2011年第S4期58-62,共5页
Rare Metal Materials and Engineering
