{112} {111} Twinning during ω to body-centered cubic transition

S. Q. Wu; D. H. Ping; Y. Yamabe-Mitarai; W. L. Xiao; Y. Yang; Q. M. Hu; G. P. Li; R. Yang

doi:10.1016/j.actamat.2013.09.040

{112} {111} Twinning during ω to body-centered cubic transition

S. Q. Wu, D. H. Ping, Y. Yamabe-Mitarai, W. L. Xiao, Y. Yang, Q. M. Hu, G. P. Li, R. Yang

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

41 Citations (Scopus)

Abstract

We propose an x-lattice mechanism that is irrelevant to dislocation behaviors for a popular twinning ({112} {111}-type) system in body-centered-cubic (bcc) metals and alloys. The twinning process is dependent on the reverse transformation of ω (hexagonal) → bcc. The driving force of the twinning is attributed to the instability of a high density of nanoscale metastable ω precursors, and the mechanism has been experimentally and theoretically confirmed in bcc-Ti alloys with the {112} {111}-type twin formed under conditions free of external stress and internal strain. The ω-lattice mechanism involves bcc lattice shuffling only, thus can be applied to all bcc metals and alloys.

Original language	English
Pages (from-to)	122-128
Number of pages	7
Journal	Acta Materialia
Volume	62
Issue number	1
DOIs	https://doi.org/10.1016/j.actamat.2013.09.040
Publication status	Published - 2014 Jan
Externally published	Yes

Keywords

First-principles calculation
Metals and alloys
Microstructure
Titanium alloy
Twin

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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abstract = "We propose an x-lattice mechanism that is irrelevant to dislocation behaviors for a popular twinning ({112} {111}-type) system in body-centered-cubic (bcc) metals and alloys. The twinning process is dependent on the reverse transformation of ω (hexagonal) → bcc. The driving force of the twinning is attributed to the instability of a high density of nanoscale metastable ω precursors, and the mechanism has been experimentally and theoretically confirmed in bcc-Ti alloys with the {112} {111}-type twin formed under conditions free of external stress and internal strain. The ω-lattice mechanism involves bcc lattice shuffling only, thus can be applied to all bcc metals and alloys.",

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author = "Wu, {S. Q.} and Ping, {D. H.} and Y. Yamabe-Mitarai and Xiao, {W. L.} and Y. Yang and Hu, {Q. M.} and Li, {G. P.} and R. Yang",

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T1 - {112} {111} Twinning during ω to body-centered cubic transition

AU - Wu, S. Q.

AU - Ping, D. H.

AU - Yamabe-Mitarai, Y.

AU - Xiao, W. L.

AU - Yang, Y.

AU - Hu, Q. M.

AU - Li, G. P.

AU - Yang, R.

PY - 2014/1

Y1 - 2014/1

N2 - We propose an x-lattice mechanism that is irrelevant to dislocation behaviors for a popular twinning ({112} {111}-type) system in body-centered-cubic (bcc) metals and alloys. The twinning process is dependent on the reverse transformation of ω (hexagonal) → bcc. The driving force of the twinning is attributed to the instability of a high density of nanoscale metastable ω precursors, and the mechanism has been experimentally and theoretically confirmed in bcc-Ti alloys with the {112} {111}-type twin formed under conditions free of external stress and internal strain. The ω-lattice mechanism involves bcc lattice shuffling only, thus can be applied to all bcc metals and alloys.

AB - We propose an x-lattice mechanism that is irrelevant to dislocation behaviors for a popular twinning ({112} {111}-type) system in body-centered-cubic (bcc) metals and alloys. The twinning process is dependent on the reverse transformation of ω (hexagonal) → bcc. The driving force of the twinning is attributed to the instability of a high density of nanoscale metastable ω precursors, and the mechanism has been experimentally and theoretically confirmed in bcc-Ti alloys with the {112} {111}-type twin formed under conditions free of external stress and internal strain. The ω-lattice mechanism involves bcc lattice shuffling only, thus can be applied to all bcc metals and alloys.

KW - First-principles calculation

KW - Metals and alloys

KW - Microstructure

KW - Titanium alloy

KW - Twin

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