Microstructures and Mechanical Properties of As-cast and Extruded Mg-2wt.%Zn alloy containing dilute content of Misch Metal
Microstructures and Mechanical Properties of as-cast and extruded Mg–2wt.％Zn alloys containing dilute misch metal were investigated. RE additions were added in the form of relatively inexpensive cerium-rich misch metal (MM). The results indicate that the dilute MM addition has evidently effect the microstructure and mechanical properties of Mg-2wt.％ Zn alloy. The grain refinement was improved and the amount of second phase precipitation was increased as increasing MM content in Mg-2wt.％Zn alloy from 0.2％ to 1.5％, and the hardness determination and tensile test results show that the hardness of its ingot and the tensile strength of its extrusion rod were also enhanced, however, excessive MM addition would promote second phases forming network precipitating in grain boundary, which would result in the marked reduction of the plasticity of the alloy. Therefore, it is recommended that the MM content not exceed 0.6％ in order to obtain high strength companying with relative higher elongation. The tensile properties of as-extruded Mg-2Zn-0.6wt.％MM alloy rod were UTS=266.7MPa, YS=213MPa, EL=14.5％ which is similar to the corresponding properties of AZ31.
Misch metal Mg-2wt. Zn alloy microstructure mechanical properties
LE Qi-Chi ZHANG Zhi-Qiang CUI Jian-Zhong JIA Zheng
Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University;S Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University;
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
260-264
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）