MATEC Web Conf.
Volume 321, 2020The 14th World Conference on Titanium (Ti 2019)
|Number of page(s)||7|
|Section||Wrought Processing and Fabrication|
|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: email@example.com
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
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