Microstructure and texture evolution of deformed Mg-Zn alloy during recrystallization

Abstract

The microstructure and texture evolution of Mg-Zn alloy during recrystallization was investigated by EBSD in the present study. Deformed region, fine DRXed region and coarse DRXed region were obtained in Mg-Zn alloy during deformation. It was found that the texture intensity in DRXed region was weaker compared with the deformed region. The second phase at grain boundaries resulted in the formation of fine DRXed grains with weaker texture compared with the coarse DRXed region. Additionally, a remarkable grain-size driven textural transition from ⟨10.0⟩–⟨11.0⟩ texture to ⟨11.0⟩ texture were detected with the growth of DRXed grains. The recrystallized grains with small grain size showed a fiber texture distributing homogeneously between ⟨10.0⟩ and ⟨11.0⟩, while ⟨11.0⟩ fiber texture was predominant for the large recrystallized grains. It is suggested that ⟨11.0⟩ oriented grains grew faster than other oriented grains, which was ascribed to larger misorientation between ⟨11.0⟩ oriented grains and their neighboring grains.