Influence of Parent Metal Microstructure and Post-Weld Heat Treatment on Microstructure and Mechanical Properties of Linear Friction Welded Ti-6Al-4V Joint

被引：27
作者：
Li, Wenya [1 ,2 ]
Wu, Hui [1 ]
Ma, Tiejun [1 ]
Yang, Changlin [1 ]
Chen, Zhongwei [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Shaanxi Key Lab Frict Welding Technol, Xian 710072, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Shaanxi, Peoples R China
来源：
ADVANCED ENGINEERING MATERIALS | 2012年 / 14卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Friction - Microstructure - Titanium alloys - Welds - Heat treatment - Vanadium alloys - Friction welding - Aluminum alloys - Ternary alloys - Brittle fracture;
D O I：
10.1002/adem.201100203
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Linear friction welding (LFW) of Ti-6Al-4V (Ti-64) titanium alloy with a different microstructure from the previous study was conducted. The joint microstructure, tensile strength and fracture characteristics were studied. Results show that the microstructure of parent metal has a strong influence on the microstructure and properties of LFW Ti-64 joints. Under the specific conditions in this study, unexpected spheric a grains were formed near the bondline, which leads to the steep drop of the joint tensile strength. Although the tensile strength could be improved through post-weld heat treatment, the failure of specimens still took place across the bondline with the cleavage fracture due to the formation of basket-weave structure at the weld center zone and the remaining of spheric a grains.
引用
收藏
页码：312 / 318
页数：7
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