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Title: Time-dependent springback of a commercially pure titanium sheet
Authors: Hama, Takayuki  kyouindb  KAKEN_id
Sakai, Takeyuki
Fujisaki, Yusuke
Fujimoto, Hitoshi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-6772-1097 (unconfirmed)
Takuda, Hirohiko  kyouindb  KAKEN_id
Author's alias: 濵, 孝之
堺, 勇行
藤本, 仁
宅田, 裕彦
Keywords: Pure titanium
Time-dependent springback
Draw bending
Stress relaxation
Creep
Issue Date: 2017
Publisher: Elsevier BV
Journal title: Procedia Engineering
Volume: 207
Start page: 263
End page: 268
Abstract: Time-dependent springback of a commercially pure titanium sheet was investigated experimentally from the viewpoints of strain rate, holding time at the bottom dead center before unloading, and elapsed time after unloading. A draw-bending test showed that the amount of springback decreased linearly with the holding time before unloading when plotted on logarithmic scale and increased with the elapsed time after unloading. To investigate the mechanism of these results, stress relaxation and creep tests were conducted. The variation of the amount of springback with the holding time corresponded well with that of the stress during stress relaxation. On the other hand, the in-plane anisotropy in the evolution of the amount of springback with the elapsed time did not correspond with that of creep strain. The mechanism of the in-plane anisotropy in the elapsed-time dependency was discussed in terms of the stress relaxation and creep behaviors.
Description: 【12th International Conference on Technology of Plasticity (ICTP 2017)】17-22 September 2017, Cambridge, United Kingdom
Rights: © 2017 The Authors. Published by Elsevier Ltd.
This article is licensed under a Creative Commons Attribution 4.0 International License.
URI: http://hdl.handle.net/2433/228175
DOI(Published Version): 10.1016/j.proeng.2017.10.772
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