Residual stresses in linear friction welding of TC17 titanium alloy considering phase fraction

被引:4
作者
He, Peng [1 ,2 ]
Wu, Yun-xin [1 ,2 ]
Zhang, Tao [1 ,2 ]
Chen, Song-yi [1 ,2 ]
Zhang, Chen [1 ,2 ]
机构
[1] Cent South Univ, Light Alloy Res Inst, Changsha 410083, Peoples R China
[2] Cent South Univ, State Key Lab Precis Mfg Extreme Serv Performance, Changsha 410083, Peoples R China
基金
中国国家自然科学基金;
关键词
linear friction welding; TC17 titanium alloy; residual stresses; phase fraction; gradient distribution; MECHANICAL-PROPERTIES; TI-6AL-4V ALLOY; HEAT-TREATMENT; MICROSTRUCTURE; STRAIN;
D O I
10.1016/S1003-6326(23)66390-3
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
To obtain accurate residual stresses in linear friction welding of TC17 alloy, a numerical relationship between the elastic constants and phase fraction of TC17 alloy was established. The elastic constants with gradient distribution were obtained by combining the phase fraction and introduced into the contour method. The results show that the elastic constants of TC17 alloy are positively correlated with alpha phase fraction and present a significant gradient distribution in the welding area with a width of about 4 mm. The relative error in calculating the welding residual stresses can be up to 36.06% if the gradient distribution of phase fraction is ignored. The corrected residual stresses in the welding area exhibit a bimodal distribution, with a peak stress of similar to 442 MPa located at the edge of the heat -affected zone. The results demonstrate the necessity of considering the phase fraction with gradient distribution.
引用
收藏
页码:184 / 193
页数:10
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