Linear friction welding of Ti-5Al-2Sn-2Zr-4Mo-4Cr alloy with dissimilar microstructure
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- 作者：Yingping Ji ; Zhenzhen Chai ; Dalong Zhao ; Sujun Wu
- 关键词：Linear friction welding ; Titanium alloys ; Microstructure ; Formation mechanism ; Recrystallization
- 刊名：Journal of Materials Processing Technology
- 出版年：April, 2014
- 年：2014
- 卷：214
- 期：4
- 页码：979-987
- 全文大小：5318 K
文摘
Dissimilar linear friction welding of Ti-5Al-2Sn-2Zr-4Mo-4Cr with bimodal and lamellar microstructures was produced. The microstructure evolution of the joint was investigated via OM, SEM, XRD, TEM and microhardness analysis. The temperature field of joint was calculated by a numerical model. The typical microstructures of weld center were recrystallized 尾 grains with some acicular 伪鈥测€?martensites. In the case of thermo-mechanically affected zone, some partial re-crystallization grains formed in severely deformed microstructures, where a mass of dislocations were observed. However, dislocations were rarely found in the recrystallized 尾 grains of weld center, the temperature field of weld joints calculated was consistent with the microstructural evolution.