title: Rolling-induced Face Centered Cubic Titanium in Hexagonal Close Packed Titanium at Room Temperature.
abstract: 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||〈001〉fcc and , 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.
authors.affiliation: School of Materials Science and Engineering, Beihang University, Beijing 100191, People's Republic of China.
authors.forename: H C
authors.initials: HC
authors.lastname: Wu
authors.affiliation: Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
authors.forename: A
authors.initials: A
authors.lastname: Kumar
authors.affiliation: Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA.
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, Beihang University, Beijing 100191, People's Republic of China.
authors.forename: X F
authors.initials: XF
authors.lastname: Bi
authors.affiliation: Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
authors.forename: C N
authors.initials: CN
authors.lastname: Tomé
authors.affiliation: Department of Materials Science, State Key Lab of Si Materials, ZheJiang University, Hangzhou, Zhejiang, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA.
authors.forename: S X
authors.initials: SX
authors.lastname: Mao