Abstract
This paper provided a novel approach for improving the strength-ductility tradeoff in β titanium alloy through a combination of mechanical {332}<113> twins with brittle isothermal ω phase. Effects of pre-strain induced twins and subsequent precipitated ω phase on deformation microstructures, and tensile properties were investigated in a β-type Ti-15Mo alloy (mass%). Mechanical twins increased with increasing pre-strain from 1% to 9%, while formation of isothermal ω phase at 523-673. K for 3.6. ks was not significantly affected by the pre-strain induced twins. Yield strength and uniform elongation characteristics depended strongly on degree of pre-strain and aging temperature. An effective combination of 1-4% pre-strain and subsequent aging at 523-573. K markedly enhanced the uniform elongation in range of 8-15% at the yield strength level of 800-1000. MPa. The enhanced uniform elongation was mainly attributable to further twinning activation during deformation in conjunction with pre-strain induced twins.
| Original language | English |
|---|---|
| Pages (from-to) | 279-287 |
| Number of pages | 9 |
| Journal | Materials Science and Engineering A |
| Volume | 646 |
| DOIs | |
| Publication status | Published - Oct 14 2015 |
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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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Improvement of strength-ductility tradeoff in β titanium alloy through pre-strain induced twins combined with brittle ω phase. / Min, Xiaohua; Emura, Satoshi; Zhang, Ling; Tsuzaki, Kaneaki; Tsuchiya, Koichi.
In: Materials Science and Engineering A, Vol. 646, 14.10.2015, p. 279-287.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Improvement of strength-ductility tradeoff in β titanium alloy through pre-strain induced twins combined with brittle ω phase
AU - Min, Xiaohua
AU - Emura, Satoshi
AU - Zhang, Ling
AU - Tsuzaki, Kaneaki
AU - Tsuchiya, Koichi
PY - 2015/10/14
Y1 - 2015/10/14
N2 - This paper provided a novel approach for improving the strength-ductility tradeoff in β titanium alloy through a combination of mechanical {332}<113> twins with brittle isothermal ω phase. Effects of pre-strain induced twins and subsequent precipitated ω phase on deformation microstructures, and tensile properties were investigated in a β-type Ti-15Mo alloy (mass%). Mechanical twins increased with increasing pre-strain from 1% to 9%, while formation of isothermal ω phase at 523-673. K for 3.6. ks was not significantly affected by the pre-strain induced twins. Yield strength and uniform elongation characteristics depended strongly on degree of pre-strain and aging temperature. An effective combination of 1-4% pre-strain and subsequent aging at 523-573. K markedly enhanced the uniform elongation in range of 8-15% at the yield strength level of 800-1000. MPa. The enhanced uniform elongation was mainly attributable to further twinning activation during deformation in conjunction with pre-strain induced twins.
AB - This paper provided a novel approach for improving the strength-ductility tradeoff in β titanium alloy through a combination of mechanical {332}<113> twins with brittle isothermal ω phase. Effects of pre-strain induced twins and subsequent precipitated ω phase on deformation microstructures, and tensile properties were investigated in a β-type Ti-15Mo alloy (mass%). Mechanical twins increased with increasing pre-strain from 1% to 9%, while formation of isothermal ω phase at 523-673. K for 3.6. ks was not significantly affected by the pre-strain induced twins. Yield strength and uniform elongation characteristics depended strongly on degree of pre-strain and aging temperature. An effective combination of 1-4% pre-strain and subsequent aging at 523-573. K markedly enhanced the uniform elongation in range of 8-15% at the yield strength level of 800-1000. MPa. The enhanced uniform elongation was mainly attributable to further twinning activation during deformation in conjunction with pre-strain induced twins.
UR - http://www.scopus.com/inward/record.url?scp=84940880550&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84940880550&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2015.08.040
DO - 10.1016/j.msea.2015.08.040
M3 - Article
AN - SCOPUS:84940880550
VL - 646
SP - 279
EP - 287
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 -