biostudies-literatureUnknown6Wu HCCombining 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.Scientific reports24370https://www.ebi.ac.uk/biostudies/studies/S-EPMC4828854biostudies-literatureRolling-induced Face Centered Cubic Titanium in Hexagonal Close Packed Titanium at Room Temperature.PMC4828854Wu HCBi XFZhang ZMao SXTome CNKumar AWang JfalseRolling-induced Face Centered Cubic Titanium in Hexagonal Close Packed Titanium at Room Temperature.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.2016-01-01T00:00:00Z2016 Apr2025-04-04T22:49:44.03Z2019-03-27T03:11:47ZS-EPMC48288542706751510.1038/srep24370