Nano-crystal formation of Mg-Cu-Gd amorphous ribbon deformed by forced cold rolling

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Park, J.S.^1 ; Park, E.S.^2

Department of Materials Science and Engineering, Hanbat National University, Daejeon 305-719, Korea, Republic of^1

Research Institute for Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Korea, Republic of^2

关键词: Amorphous ribbon;    Devitrification behavior;    Heat of crystallization;    Kinetic analysis;    Mg-based amorphous alloys;    TEM observations;    Temperature intervals;    Thickness ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012165/pdf
DOI  :  10.1088/1757-899X/63/1/012165

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Structural and devitrification behaviors of selected Mg-based amorphous alloys have been investigated for the Mg-Cu-Gd amorphous ribbon fabricated by repeated forced cold rolling. When amorphous ribbons were cold- rolled up to a thickness ratio of ∼ 50%, the heat of crystallization (AHx) exhibited a reduction. In order to identify devitrification manner of the amorphous alloys, in-situ TEM (Transmission Electron Microscope) observations up to 623 K have been carried out for the as-fabricated ribbon and cold-rolled ribbon at 10 K temperature interval from 423 K. The nano-crystallization behaviors and mechanism of Mg-Cu-Gd alloy ribbon are discussed in terms of TEM observations and kinetic analysis.