The study of microstructure and mechanical properties of twin-roll cast AZ31 magnesium alloy after constrained groove pressing

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Zimina, M.^1 ; Bohlen, J.^2 ; Letzig, D.^2 ; Kurz, G.^2 ; Cieslar, M.^1 ; Zník, J.^3

Charles University in Prague, Faculty of Mathematics and Physics, Prague, Czech Republic^1

Magnesium Innovation Centre (MagIC) Helmholz Zentrum Geesthacht, Geesthacht, Germany^2

COMTES FHT A.s., Czech Republic^3

关键词: AZ31 magnesium alloy;    Constrained groove pressing;    Microhardness mapping;    Microstructure and mechanical properties;    Microstructure investigations;    Microstructure observation;    Pressed materials;    Ultra-fine-grained;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012078/pdf
DOI  :  10.1088/1757-899X/63/1/012078

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Microstructure investigation and microhardness mapping were done on the material with ultra-fine grained structure prepared by constrained groove pressing of twin-roll cast AZ31 magnesium strips. The microstructure observations showed significant drop of the grain size from 200 gm to 20 gm after constrained groove pressing. Moreover, the heterogeneities in the microhardness along the cross-section observed in the as-cast strip were replaced by the bands of different microhardness in the constrained groove pressed material. It is shown that the constrained groove pressing technique is a good tool for the grain refinement of magnesium alloys.