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Title: Anisotropic deformation behavior under various strain paths in commercially pure titanium Grade 1 and Grade 2 sheets
Authors: Yi, Ning
Hama, Takayuki  kyouindb  KAKEN_id
Kobuki, Akihiro
Fujimoto, Hitoshi  kyouindb  KAKEN_id
Takuda, Hirohiko  kyouindb  KAKEN_id
Author's alias: 濵, 孝之
藤本, 仁
宅田, 裕彦
Keywords: Commercially pure titanium sheet
Work-hardening
Anisotropy
Twinning
Detwinning
Issue Date: 8-Feb-2016
Publisher: Elsevier Ltd.
Journal title: Materials Science and Engineering A
Volume: 655
Start page: 70
End page: 85
Abstract: In this study, the anisotropic deformation behavior in commercially pure titanium Grade 1 and Grade 2 sheets under various strain paths was examined. A small but sharp stress peak arose during tension following compression in the Grade 1 sheet when loaded in the rolling direction, and the occurrence of a stress peak was retarded when the sheet was subjected to cyclic loading; however, such behavior did not occur in the Grade 2 sheet. Similarly, the work-hardening rate was different between the initial and latter stages of compression following tension. These behaviors did not arise when the sheets were loaded in other directions. The type of active twin mode was different depending on the loading path. When loaded in the rolling direction in both Grade 1 and Grade 2 sheets, <1012> twinning and detwinning were active, respectively, during compression and tension following compression, whereas <1122> twinning and detwinning were active during tension and compression following tension. The twinning activity was much more pronounced in the Grade 1 sheet than in the Grade 2 sheet. The abovementioned stress-strain responses were presumed to result from twinning and detwinning activities as for magnesium alloy sheets. However, we concluded that the effect of twinning activity on the stress-strain curves was much smaller in the titanium sheet than in magnesium alloy sheets.
Rights: © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
The full-text file will be made open to the public on 8 February 2018 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/218275
DOI(Published Version): 10.1016/j.msea.2015.12.081
Appears in Collections:Journal Articles

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