JOURNAL ARTICLE

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

Yingying Zong, Bin Shao, Wenchen Xu, Bin Guo, Debin Shan
Scientific Reports 2017 May 10, 7 (1): 1645
28490800
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.

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