{112} ⟨1 11⟩ Twinning during ω to body-centered cubic transition

被引：82

作者：

Wu, S. Q. ^{[1
,2
]}

Ping, D. H. ^{[1
]}

Yamabe-Mitarai, Y. ^{[1
]}

Xiao, W. L. ^{[1
]}

Yang, Y. ^{[3
,4
]}

Hu, Q. M. ^{[5
]}

Li, G. P. ^{[2
]}

Yang, R. ^{[2
,5
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

[3] Cent Res Inst, Baosteel Grp Cooperat, Shanghai 201900, Peoples R China

[4] Baosteel Special Steel Co Ltd, Shanghai 200940, Peoples R China

[5] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

ACTA MATERIALIA | 2014年 / 62卷

关键词：

Twin; Metals and alloys; Titanium alloy; Microstructure; First-principles calculation; MULTILAYER STACKING-FAULTS; POTENTIAL MODEL; BCC METALS; ALLOY; DEFORMATION; TRANSFORMATION; APPROXIMATION; MARTENSITE; PHASE; TWINS;

D O I：

10.1016/j.actamat.2013.09.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose an omega-lattice mechanism that is irrelevant to dislocation behaviors for a popular twinning ({112}< 1 1 1 >-type) system in body-centered-cubic (bcc) metals and alloys. The twinning process is dependent on the reverse transformation of omega (hexagonal) -> bcc. The driving force of the twinning is attributed to the instability of a high density of nanoscale metastable omega precursors, and the mechanism has been experimentally and theoretically confirmed in bcc-Ti alloys with the {1 1 2}< 1 1 1 >-type twin formed under conditions free of external stress and internal strain. The omega-lattice mechanism involves bcc lattice shuffling only, thus can be applied to all bcc metals and alloys. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：122 / 128

页数：7

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