Rolling-induced Face Centered Cubic Titanium in Hexagonal Close Packed Titanium at Room Temperature

被引：160
|
作者：
Wu, H. C. [1 ]
Kumar, A. [2 ]
Wang, J. [3 ]
Bi, X. F. [1 ]
Tome, C. N. [2 ]
Zhang, Z. [4 ]
Mao, S. X. [5 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
[3] Univ Nebraska, Mech & Mat Engn, Lincoln, NE 68588 USA
[4] Zhejiang Univ, State Key Lab Si Mat, Dept Mat Sci, Hangzhou 310003, Zhejiang, Peoples R China
[5] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA
来源：
SCIENTIFIC REPORTS | 2016年 / 6卷
基金：
中国国家自然科学基金;
关键词：
TOTAL-ENERGY CALCULATIONS; PHASE-TRANSFORMATION; TWINNING DISLOCATIONS; INTERFACE DEFECTS; HCP; TRANSITION; BOUNDARIES; ZIRCONIUM; BEHAVIOR; COBALT;
D O I：
10.1038/srep24370
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Combining transmission electron microscopes and density functional theory calculations, we report the nucleation and growth mechanisms of room temperature rolling induced face-centered cubic titanium (fcc-Ti) in polycrystalline hexagonal close packed titanium (hcp-Ti). Fcc-Ti and hcp-Ti take the orientation relation: < 0001 >(hcp)parallel to < 001 >(fcc) and {10 (1) over bar0}(hcp)parallel to{110}(fcc), different from the conventional one. The nucleation of fcc-Ti is accomplished via pure-shuffle mechanism with a minimum stable thickness of three atomic layers, and the growth via shear-shuffle mechanisms through gliding two-layer disconnections or pure-shuffle mechanisms through gliding four-layer disconnections. Such phase transformation offers an additional plastic deformation mode comparable to twinning.
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页数：8
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