A High Strength Mg-6Zn-1Y-1Ce Alloy Prepared by Hot Extrusion  

作　　者：杨文朋 GUO Xuefeng 

机构地区：[1]School of Materials Science and Engineering, Henan Polytechnic University [2]School of Materials Science and Engineering, Xi'an University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第2期389-395,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.50271054);the Ph D Programs Foundation of Ministry of Education of China(No.20070700003);the Science and Technologies Foundation of Henan of China(No.102102210031);the Natural Science Foundation of Henan Educational Committee of China(No.2010A430008)

摘　　要：Microstructures and tensile properties of Mg-6Zn-IY-1Ce alloy extruded in a temperature range between 300 ℃ and 400 ℃ were investigated. The yield strength of the material increased as the extrusion temperature decreased due to grain refinement. The yield strengths and grain sizes of extruded samples met Hall-Petch equation. The microstructure of the alloy extruded at 300 ℃ had a bimodal grain size distribution with an average grain size of 2.7 μm and showed a yield strength of 327 MPa with an elongation of 9%. The fine-grained microstructures were attributed to the dynamic recrystallization and the pinning effect of fine strengthening particles.Microstructures and tensile properties of Mg-6Zn-IY-1Ce alloy extruded in a temperature range between 300 ℃ and 400 ℃ were investigated. The yield strength of the material increased as the extrusion temperature decreased due to grain refinement. The yield strengths and grain sizes of extruded samples met Hall-Petch equation. The microstructure of the alloy extruded at 300 ℃ had a bimodal grain size distribution with an average grain size of 2.7 μm and showed a yield strength of 327 MPa with an elongation of 9%. The fine-grained microstructures were attributed to the dynamic recrystallization and the pinning effect of fine strengthening particles.

关 键 词：magnesium alloy EXTRUSION dynamic recrystallization tensile properties Hall-Petch equation 

分 类 号：TG379[金属学及工艺—金属压力加工]