The formation mechanism of tear strips on stretched Ti-22Al-25Nb alloy sheets

Yingying Zong; Bin Shao; Wenchen Xu; Bin Guo; Debin Shan

doi:10.1038/s41598-017-01889-9

The formation mechanism of tear strips on stretched Ti-22Al-25Nb alloy sheets

Sci Rep. 2017 May 10;7(1):1645. doi: 10.1038/s41598-017-01889-9.

Authors

Yingying Zong¹, Bin Shao¹, Wenchen Xu², Bin Guo¹, Debin Shan³

Affiliations

¹ State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China.
² State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China. xuwc_76@hit.edu.cn.
³ State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China. shandebin@hit.edu.cn.

Abstract

This paper reports the presence of tear strips on the surface of a Ti-22Al-25Nb alloy sheet stretched at 960 °C. The test piece reveals a "bamboo"-shaped pattern on its surface, which severely affects the quality of the alloy. Microstructure analysis indicates that the formation mechanism of the tear strip is related to both the rich α₂ phase layer and the interfacial B2 phase dynamic recrystallization layer between the α₂ phase layer and the substrate metal.

Publication types

Research Support, Non-U.S. Gov't