Microstructures and properties of reciprocating extruded as-cast ZK60 magnesium alloy

摘要：

As-cast d 50 mm ZK60 magnesium alloys were reciprocating extruded for different passes under (335±5)℃.The microstructures and properties of the alloys were studied under different reciprocating extrusion passes.The results show that,reciprocating extruded microstructures were refined and uniformed effectively,in compared with as-cast condition.For 2 passes,the grain size is about 7 μm.After 4 passes,the grain size is about 6 μm.During reciprocating extrusion,refined as-cast eutectic and reinforcement phases in dispersed particles are uniformly distributed on matrix,and their size is less than 50 nm.The tensile strength,yield strength and the elongation of 4 passes reciprocating extruded as-cast ZK60 magnesium alloy are 311 MPa,214 MPa and 17.93％,respectively.The thermal expansion coefficient of RE-4-EX-ZK60-CT magnesium alloy is the lowest.More or less extrusion passes can not decrease the value of the thermal expansion coefficient.

关键词： reciprocating extrusion magnesium alloys ZK60 dynamic recrystallization

作者: JIANG Ting GUO Xue-feng MA Guang

作者单位: Northwest Institute For Non-ferrous Metal Research,Xi’an 710016,China;School of Materials Science an School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China Northwest Institute For Non-ferrous Metal Research,Xi’an 710016,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）