On microstructure and property differences in a linear friction welded near-alpha titanium alloy joint

被引：23
|
作者：
Su, Yu [1 ]
Li, Wenya [1 ]
Wang, Xinyu [1 ]
Ma, Tiejun [1 ]
Yang, Xiawei [1 ]
Vairis, Achilles [2 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Shaanxi Key Lab Frict Welding Technol, Xian 710072, Shaanxi, Peoples R China
[2] TEI Crete, Dept Mech Engn, Iraklion 71004, Crete, Greece
来源：
JOURNAL OF MANUFACTURING PROCESSES | 2018年 / 36卷
基金：
中国国家自然科学基金;
关键词：
Linear friction welding; Microstructural evolution; Dynamic recrystallization; Tensile strength; Impact toughness; MECHANICAL-PROPERTIES; IMPACT TOUGHNESS; SINGLE-CRYSTAL; EVOLUTION; SUPERALLOY;
D O I：
10.1016/j.jmapro.2018.10.017
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, a near-alpha titanium alloy (Ti-6Al-2Zr-1Mo-1V) was welded with linear friction welding (LFW). The microstructural evolution and mechanical properties of the joint were evaluated. Results show that grains are remarkably refined in the weld center zone due to dynamic recrystallization because of the effect of thermomechanical coupling, while the fractions of deformation grains, sub-structure grains and recrystallized grains are significantly different from those of the base metal (BM). The room temperature tensile strength of the welded joint is not lower than that of the BM, because all the failure occurs in the BM. It is more interesting to find that the joint impact toughness is increased by 19.1% compared to the BM.
引用
收藏
页码：255 / 263
页数：9
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