Direct evidence for stress-induced face-centered cubic zirconium

Abstract The direct evidence for stress-induced face-centered cubic (FCC) zirconium was firstly reported using in-situ electron backscatter diffraction (EBSD) and indentation observation. The transformed FCC phases governed by a high stress (1244.92 MPa) induced by a load of 500 g. Two orientation relations (OR) (including B-type and P-type) between the hexagonal close-packed (HCP) and FCC phase were both detected. The mechanisms of HCP → FCC phase transformation were proposed by follows: B-type OR was achieved via partial dislocation gliding theory, while P-type OR was attained through the partial dislocation gliding and shuffle displacement. Moreover, the interface between B-type and P-type FCC phase was identified as (110) plane and the rotation axis and angle were [ 1 ‾ 01] and 52.1°, respectively.