| Issue |
MATEC Web Conf.
Volume 321, 2020
The 14th World Conference on Titanium (Ti 2019)
|
|
|---|---|---|
| Article Number | 13003 | |
| Number of page(s) | 7 | |
| Section | Wrought Processing and Fabrication | |
| DOI | https://doi.org/10.1051/matecconf/202032113003 | |
| Published online | 12 October 2020 | |
Effect of strain rate on α-lath thickness of TC17 alloy after deformation and subsequent heat treatment
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, P.R. China
* Corresponding author, Tel. +86 29 88460465, E-mail: luojiao@nwpu.edu.cn
Effect of strain rate on α-lath thickness of TC17 alloy with a basketweave microstructure was studied in the present work. For this purpose, this alloy was deformed in the β phase region and subsequently soluted and aged in α+β phase region. Moreover, optical micrograph (OM) and electron backscatter diffraction (EBSD) were applied to analyze the change of lath thickness at different strain rates. The result showed that α-lath thickness increased with increasing strain rate. This phenomenon was possibly attributed to the higher degree of variant selection (DVS) at higher strain rate (0.1 s-1). The higher DVS was beneficial for the formation of parallel α-lath colonies during cooling after deformation. And, these parallel α-lath colonies would more easily grow up and coarsen during subsequent heat treatment. Therefore, α-lath at higher strain rate is more thick.
Key words: TC17 alloy / Basketweave microstructure / α-lath thickness / Electron backscattered diffraction
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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