| Issue |
MATEC Web Conf.
Volume 321, 2020
The 14th World Conference on Titanium (Ti 2019)
|
|
|---|---|---|
| Article Number | 12006 | |
| Number of page(s) | 5 | |
| Section | Microstructure Evolution | |
| DOI | https://doi.org/10.1051/matecconf/202032112006 | |
| Published online | 12 October 2020 | |
Microstructure formation during thermomechanical processing in Ti-17 alloy
Institute for Materials Research, Tohoku University, Sendai, Japan
The microstructure evolution during solution treatment at (alpha+beta) two phase region and subsequent aging process at 620 ˚C, after compressing the specimen in beta structure to different strain (0-70%) followed by cooling to room temperature has been investigated. Deformation strain hardly affects the total volume fraction of alpha phase after the solution treatment and aging process. On the other hand, with an increase in deformation strain, the volume fraction of the primary alpha phase increased although secondary alpha phase decreased, during the aging process, scuhdecrease in secondary alpha phase volume fraction results in a decrease in the strength. The loss of coherency of alpha/beta interphase boundaries at higher deformation strain promoted by dynamic recovery increases the interfacial mobility; which results in faster growth of primary alpha, thereby decreases secondary alpha precipitation.
© 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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