The dynamic response of the metastable β titanium alloy Ti-2Al-9.2Mo-2Fe at ambient temperature

J. F. Xiao; Z. H. Nie; C. W. Tan; G. Zhou; R. Chen; M. R. Li; X. D. Yu; X. C. Zhao; S. X. Hui; W. J. Ye; Y. T. Lee

doi:10.1016/j.msea.2019.02.068

The dynamic response of the metastable β titanium alloy Ti-2Al-9.2Mo-2Fe at ambient temperature

J. F. Xiao, Z. H. Nie, C. W. Tan^*, G. Zhou, R. Chen, M. R. Li, X. D. Yu, X. C. Zhao, S. X. Hui, W. J. Ye, Y. T. Lee

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

The mechanical behavior of a metastable β titanium alloy, Ti-2Al-9.2Mo-2Fe (wt%), was studied through high compression strain rate (~3000 s⁻¹) at ambient temperature by Spilt Hopkinson Pressure Bar (SHPB) tests after solution treatment at 850 ℃ for 0.5 h and 950 ℃ for 1 h. The mechanism of deformation and microstructure evolution was investigated by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). Multiple deformation mechanisms, including primary and secondary {332} twinning, stress-induced martensite, and stress-induced ω-phase and dislocation slips, were identified in specimens subjected to solution treatment at 850 ℃ for 0.5 h. In contrast, only primary and secondary {332} twinning and dislocation slips were detected in specimens subjected to solution treatment at 950 ℃ for 1 h. The athermal ω precipitation produced after solution treatment and elevated temperature generated during dynamic loading played a crucial role in the different deformation mechanisms observed in the two different specimens. Moreover, the deformation mechanisms active during plastic deformation in the different strain regimes affected the development of different textures in the Ti-2Al-9.2Mo-2Fe alloys from each regime.

Original language	English
Pages (from-to)	191-200
Number of pages	10
Journal	Materials Science and Engineering: A
Volume	751
DOIs	https://doi.org/10.1016/j.msea.2019.02.068
Publication status	Published - 28 Mar 2019

Keywords

Deformation mechanism
High strain rate
Metastable β-titanium alloy
Strain-hardening behavior

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10.1016/j.msea.2019.02.068

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title = "The dynamic response of the metastable β titanium alloy Ti-2Al-9.2Mo-2Fe at ambient temperature",

abstract = "The mechanical behavior of a metastable β titanium alloy, Ti-2Al-9.2Mo-2Fe (wt%), was studied through high compression strain rate (~3000 s−1) at ambient temperature by Spilt Hopkinson Pressure Bar (SHPB) tests after solution treatment at 850 ℃ for 0.5 h and 950 ℃ for 1 h. The mechanism of deformation and microstructure evolution was investigated by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). Multiple deformation mechanisms, including primary and secondary {332} twinning, stress-induced martensite, and stress-induced ω-phase and dislocation slips, were identified in specimens subjected to solution treatment at 850 ℃ for 0.5 h. In contrast, only primary and secondary {332} twinning and dislocation slips were detected in specimens subjected to solution treatment at 950 ℃ for 1 h. The athermal ω precipitation produced after solution treatment and elevated temperature generated during dynamic loading played a crucial role in the different deformation mechanisms observed in the two different specimens. Moreover, the deformation mechanisms active during plastic deformation in the different strain regimes affected the development of different textures in the Ti-2Al-9.2Mo-2Fe alloys from each regime.",

keywords = "Deformation mechanism, High strain rate, Metastable β-titanium alloy, Strain-hardening behavior",

author = "Xiao, {J. F.} and Nie, {Z. H.} and Tan, {C. W.} and G. Zhou and R. Chen and Li, {M. R.} and Yu, {X. D.} and Zhao, {X. C.} and Hui, {S. X.} and Ye, {W. J.} and Lee, {Y. T.}",

note = "Publisher Copyright: {\textcopyright} 2019",

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doi = "10.1016/j.msea.2019.02.068",

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T1 - The dynamic response of the metastable β titanium alloy Ti-2Al-9.2Mo-2Fe at ambient temperature

AU - Xiao, J. F.

AU - Nie, Z. H.

AU - Tan, C. W.

AU - Zhou, G.

AU - Chen, R.

AU - Li, M. R.

AU - Yu, X. D.

AU - Zhao, X. C.

AU - Hui, S. X.

AU - Ye, W. J.

AU - Lee, Y. T.

PY - 2019/3/28

Y1 - 2019/3/28

N2 - The mechanical behavior of a metastable β titanium alloy, Ti-2Al-9.2Mo-2Fe (wt%), was studied through high compression strain rate (~3000 s−1) at ambient temperature by Spilt Hopkinson Pressure Bar (SHPB) tests after solution treatment at 850 ℃ for 0.5 h and 950 ℃ for 1 h. The mechanism of deformation and microstructure evolution was investigated by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). Multiple deformation mechanisms, including primary and secondary {332} twinning, stress-induced martensite, and stress-induced ω-phase and dislocation slips, were identified in specimens subjected to solution treatment at 850 ℃ for 0.5 h. In contrast, only primary and secondary {332} twinning and dislocation slips were detected in specimens subjected to solution treatment at 950 ℃ for 1 h. The athermal ω precipitation produced after solution treatment and elevated temperature generated during dynamic loading played a crucial role in the different deformation mechanisms observed in the two different specimens. Moreover, the deformation mechanisms active during plastic deformation in the different strain regimes affected the development of different textures in the Ti-2Al-9.2Mo-2Fe alloys from each regime.

AB - The mechanical behavior of a metastable β titanium alloy, Ti-2Al-9.2Mo-2Fe (wt%), was studied through high compression strain rate (~3000 s−1) at ambient temperature by Spilt Hopkinson Pressure Bar (SHPB) tests after solution treatment at 850 ℃ for 0.5 h and 950 ℃ for 1 h. The mechanism of deformation and microstructure evolution was investigated by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). Multiple deformation mechanisms, including primary and secondary {332} twinning, stress-induced martensite, and stress-induced ω-phase and dislocation slips, were identified in specimens subjected to solution treatment at 850 ℃ for 0.5 h. In contrast, only primary and secondary {332} twinning and dislocation slips were detected in specimens subjected to solution treatment at 950 ℃ for 1 h. The athermal ω precipitation produced after solution treatment and elevated temperature generated during dynamic loading played a crucial role in the different deformation mechanisms observed in the two different specimens. Moreover, the deformation mechanisms active during plastic deformation in the different strain regimes affected the development of different textures in the Ti-2Al-9.2Mo-2Fe alloys from each regime.

KW - Deformation mechanism

KW - High strain rate

KW - Metastable β-titanium alloy

KW - Strain-hardening behavior

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JO - Materials Science and Engineering: A

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ER -

The dynamic response of the metastable β titanium alloy Ti-2Al-9.2Mo-2Fe at ambient temperature

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Keywords

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