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Title: Crystal-plasticity finite-element analysis of anisotropic deformation behavior in a commercially pure titanium Grade 1 sheet
Authors: Hama, Takayuki  kyouindb  KAKEN_id
Kobuki, Akihiro
Takuda, Hirohiko  kyouindb  KAKEN_id
Author's alias: 濵, 孝之
小吹, 晃弘
宅田, 裕彦
Keywords: Crystal plasticity
Finite elements
Anisotropic material
Reverse loading
Issue Date: Apr-2017
Publisher: Elsevier BV
Journal title: International Journal of Plasticity
Volume: 91
Start page: 77
End page: 108
Abstract: A crystal-plasticity finite-element method was used to study the deformation behavior of a commercially pure titanium Grade 1 sheet upon different strain paths. Prismatic slip, pyramidal <a> slip, basal slip, two types of pyramidal <a + c> slip, {10[1¯]2} twinning, and {11[2¯]2} twinning were taken into consideration. The material parameters were systematically determined considering the role of each active deformation mode. The simulation results were in good agreement with the experimental results with respect to evolution of the Lankford value, stress–strain curves, contours of plastic work, and texture evolution for the strain paths examined in this study. The mechanism of anisotropic deformation behavior was then investigated, focusing especially on the role of the activity of twinning in the plastic deformation. It was found that the twinning activity significantly affected the following characteristics: the anisotropies in the Lankford value and work hardening under compression and the tension–compression asymmetries in the stress–strain curves in the rolling direction. The detwinning activity also affected stress–strain curves upon reverse loading, in particular in the rolling direction. To systematically understand the deformation mechanism, the effect of slip activity on the deformation behavior is also discussed.
Rights: © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
The full-text file will be made open to the public on 01 April 2019 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。
DOI(Published Version): 10.1016/j.ijplas.2016.12.005
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