T. Imai, N. Saito, I. Shigematsu, K. Suzuki, National Institute of Advanced Industrial Science & Technology, Nagoya, Japan; S. Dong, Harbin Institute of Technology, Harbin, China
The microstructure and the mechanical properties of AZ31 alloys processed by extrusion and different-speeds-rolling(DSR) were investigated. The AZ31 deformed by DSR has relatively uniformly fine grain size of 10~15micron and indicates strong anisotropy for yield stress and tensile strength in the case the roller was kept at room temperature and the billets heated up to 573K. But, the anisotropy of strength for AZ31 removed in the case the roller temperature becomes to 573K and the billet was heated to more than 573K and formability of the AZ31 was investigated. AZ31 deformed by extrusion and DSR produces superplasticity which indicates 250% total elongation at the strain rate of 10-3 s-1 and 723~748K
Summary: The microstructure and the mechanical properties of AZ31 alloys processed by extrusion and different-speeds-rolling(DSR) were investigated. The AZ31 deformed by DSR has relatively uniformly fine grain size of 10~15micron and indicates strong anisotropy for yield stress and tensile strength in the case the roller was kept at room temperature and the billets heated up to 573K. But, the anisotropy of strength for AZ31 removed in the case the roller temperature becomes to 573K and the billet was heated to more than 573K and formability of the AZ31 was investigated. AZ31 deformed by extrusion and DSR produces superplasticity which indicates 250% total elongation at the strain rate of 10-3 s-1 and 723~748K.
