Abstract
Distinctive thermal-induced prismatic-type face-centered cubic zirconium phases (named γ phase) were firstly reported in pure zirconium. Atomic insight was provided into the α/γ interface and structure of interfacial misfit dislocations. Furthermore, we proposed the formation mechanism of this γ phase. Our results revealed that the semi-coherent interface contributes to periodic extra half-plane on the γ side and the volume expansion is 19.8% due to the α → γ phase transformation. More importantly, the α → γ phase transformation involved expansion and shuffle displacement.
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