Abstract
The 332<113> twinning structure evolution in nearly [122] and [001] oriented grains was quantitatively examined in a polycrystalline Ti-15Mo alloy at various tensile strains. Twinning with a single variant, which obeyed Schmid's law, was induced in [122] grain after yielding. The area fraction of twins rapidly increased from 3% to 69% with strain from 0.02 to 0.15, and changed gradually to 81% at strains of up to 0.25. In [001] grain, twin formation violating Schmid's law with three variants was confirmed after the strain reached 0.01. Twins with an area fraction of 0.7% showed no significant change with further deformation. The contribution of deformation modes to the total tensile strain in [122] grain was dominated by twinning at strains of up to 0.15, and became dislocation slip with further deformation. In [001] grain, dislocation slip mainly contributed to the plastic deformation over the entire strain range. Dynamic microstructure refinement arising from twinning, namely the dynamic Hall-Petch effect, was the main strain hardening mechanism in [122] grain at strains of up to 0.15. However, strain hardening caused by twinning was negligible in [001] grain. The effects of local stress concentration and geometric constraint between neighboring grains on the deformation microstructural evolution and strain hardening behavior should also be considered.
| Original language | English |
|---|---|
| Pages (from-to) | 1-11 |
| Number of pages | 11 |
| Journal | Materials Science and Engineering A |
| Volume | 659 |
| DOIs | |
| Publication status | Published - Apr 6 2016 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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Deformation microstructural evolution and strain hardening of differently oriented grains in twinning-induced plasticity β titanium alloy. / Min, Xiaohua; Emura, Satoshi; Chen, Xuejiao; Zhou, Xueyin; Tsuzaki, Kaneaki; Tsuchiya, Koichi.
In: Materials Science and Engineering A, Vol. 659, 06.04.2016, p. 1-11.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Deformation microstructural evolution and strain hardening of differently oriented grains in twinning-induced plasticity β titanium alloy
AU - Min, Xiaohua
AU - Emura, Satoshi
AU - Chen, Xuejiao
AU - Zhou, Xueyin
AU - Tsuzaki, Kaneaki
AU - Tsuchiya, Koichi
PY - 2016/4/6
Y1 - 2016/4/6
N2 - The 332<113> twinning structure evolution in nearly [122] and [001] oriented grains was quantitatively examined in a polycrystalline Ti-15Mo alloy at various tensile strains. Twinning with a single variant, which obeyed Schmid's law, was induced in [122] grain after yielding. The area fraction of twins rapidly increased from 3% to 69% with strain from 0.02 to 0.15, and changed gradually to 81% at strains of up to 0.25. In [001] grain, twin formation violating Schmid's law with three variants was confirmed after the strain reached 0.01. Twins with an area fraction of 0.7% showed no significant change with further deformation. The contribution of deformation modes to the total tensile strain in [122] grain was dominated by twinning at strains of up to 0.15, and became dislocation slip with further deformation. In [001] grain, dislocation slip mainly contributed to the plastic deformation over the entire strain range. Dynamic microstructure refinement arising from twinning, namely the dynamic Hall-Petch effect, was the main strain hardening mechanism in [122] grain at strains of up to 0.15. However, strain hardening caused by twinning was negligible in [001] grain. The effects of local stress concentration and geometric constraint between neighboring grains on the deformation microstructural evolution and strain hardening behavior should also be considered.
AB - The 332<113> twinning structure evolution in nearly [122] and [001] oriented grains was quantitatively examined in a polycrystalline Ti-15Mo alloy at various tensile strains. Twinning with a single variant, which obeyed Schmid's law, was induced in [122] grain after yielding. The area fraction of twins rapidly increased from 3% to 69% with strain from 0.02 to 0.15, and changed gradually to 81% at strains of up to 0.25. In [001] grain, twin formation violating Schmid's law with three variants was confirmed after the strain reached 0.01. Twins with an area fraction of 0.7% showed no significant change with further deformation. The contribution of deformation modes to the total tensile strain in [122] grain was dominated by twinning at strains of up to 0.15, and became dislocation slip with further deformation. In [001] grain, dislocation slip mainly contributed to the plastic deformation over the entire strain range. Dynamic microstructure refinement arising from twinning, namely the dynamic Hall-Petch effect, was the main strain hardening mechanism in [122] grain at strains of up to 0.15. However, strain hardening caused by twinning was negligible in [001] grain. The effects of local stress concentration and geometric constraint between neighboring grains on the deformation microstructural evolution and strain hardening behavior should also be considered.
UR - http://www.scopus.com/inward/record.url?scp=84958241871&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84958241871&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2016.01.105
DO - 10.1016/j.msea.2016.01.105
M3 - Article
AN - SCOPUS:84958241871
VL - 659
SP - 1
EP - 11
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -