2024-03-29T11:34:11Z
https://tsukuba.repo.nii.ac.jp/oai
oai:tsukuba.repo.nii.ac.jp:00035733
2023-02-01T07:01:53Z
117:1713
117:1715
3:62:5296:4662
Origin of {3 3 2} twinning in metastable β-Ti alloys
Tobe, Hirobumi
金, 熙榮
キム, ヘヨン
Kim, Hee Young
Inamura, Tomonari
Hosoda, Hideki
宮崎, 修一
ミヤザキ, シュウイチ
MIYAZAKI, Shuichi
In this paper, the origin of View the MathML source{332}〈113¯〉 twinning, which is a unique twinning mode in metastable β-Ti alloys, was investigated. The possible twinning modes in metastable β-Ti alloys are derived by considering lattice instability in addition to the theory of the crystallography of deformation twinning. In order to consider lattice instability in the body-centered-cubic (bcc) structure, a modulated structure was proposed. We then clarify how the modulated structure facilitates View the MathML source{332}〈113¯〉 twinning preferentially compared to other possible twinning modes by evaluating the magnitude of twinning shear and the complexity of shuffle. It was found that the lattice instability makes View the MathML source{112}〈1¯1¯1〉 twinning, which is a major twinning mode observed in alloys with stable bcc structure, unlikely to occur because the lattice modulation causes additional shuffling to form the View the MathML source{112}〈1¯1¯1〉 twin. It was also found that View the MathML source{332}〈113¯〉 twinning is the most possible twinning mode in the modulated structure in terms of the magnitude of twinning shear and the complexity of shuffle. The new formation model of the View the MathML source{332}〈113¯〉 twin presented in this study can explain how the lattice instability preferentially activates the View the MathML source{332}〈113¯〉 twinning in metastable β-Ti alloys.
journal article
Elsevier
2014-02
application/pdf
Acta materialia
64
345
355
1359-6454
AA1106787X
https://tsukuba.repo.nii.ac.jp/record/35733/files/AM_64.pdf
eng
https://doi.org/10.1016/j.actamat.2013.10.048
© 2013 Acta Materialia Inc. Published by Elsevier Ltd.
NOTICE: this is the author’s version of a work that was accepted for publication in Acta materialia. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in PUBLICATION,Volume 64, February 2014, DOI:10.1016/j.actamat.2013.10.048
open access