文献类型：期刊文献

英文题名：Effects of hot extrusion and aging on microstructure and mechanicalproperties of Mg-Zn-Si-Ca magnesium alloy

作者：Zhang, Xiu-Qing[1]; Chen, Ge[1]; Wang, Yang[1]; Han, Min-Yu[1]

机构：[1] Key Laboratory of Safety Science of Pressurized System, Ministry of Education, School of Mechanical Engineering, East China University Of science and Technology, Shanghai 200237, China

年份：2013

卷号：668

起止页码：823

外文期刊名：Advanced Materials Research

收录：EI(收录号：20131516197298)

语种：英文

外文关键词：Extrusion - Zinc alloys - Dynamic recrystallization - Calcium alloys - Silicon alloys - Tensile strength

摘要：Homogenized magnesium alloy Mg-6Zn-Si-0.25Ca has been hot-extruded and then agingtreated for improving the magnesium alloy plastic deformation ability and promoting applications ofmagnesium alloys. In the hot extrusion process, the influences of extrusion parameters formicrostructures and mechanical properties of Mg-6Zn-Si-0.25Ca magnesium alloy were investigated.The results show that dynamic recrystallization occurred during hot extrusion. Compared with as-castalloy, the grains are fined remarkably, and the mechanical properties are enhanced obviously. Twincrystals appeared in grains after hot extrusion, with the extrusion temperature rising, twin crystalstructures has been reduced. Aging further increased the mechanical properties of the estruded alloy.The ultimate tensile strength of Mg-6Zn-Si-0.25Ca alloy is about 385 MPa and the elongation isabout 11% when extruded at 320°C (extrusion ratio is 10) and aged at 190°C for 8h. ? (2013) Trans Tech Publications, Switzerland.