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张代东,蔡彦岑,时小宝,房大庆,原洪加,柴跃生,王枫.高Ca含量Mg-13Zn-0.5Nd合金组织与力学性能[J].稀有金属材料与工程(英文),2018,47(1):119~123.[Zhang Daidong,Cai Yancen,Shi Xiaobao,Fang Daqing,Yuan Hongjia,Chai Yuesheng,Wang Feng.Effect of High Ca on Microstructure and Mechanical Property of Mg-13Zn-0.5Nd alloy[J].Rare Metal Materials and Engineering,2018,47(1):119~123.]
Effect of High Ca on Microstructure and Mechanical Property of Mg-13Zn-0.5Nd alloy
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Received:October 19, 2015  Revised:January 27, 2016
DOI:
Key words: high-Ca Magnesium Alloy  GRF  T6 heat treament  no equilibrium cooling
Foundation item:山西省科技攻关项目(项目号20140321014-04)
Author NameAffiliationE-mail
Zhang Daidong Taiyuan University of Science and Technology zhangdaidong138@sina.com 
Cai Yancen Taiyuan University of Science and Technology  
Shi Xiaobao Taiyuan University of Science and Technology  
Fang Daqing Taiyuan University of Science and Technology  
Yuan Hongjia Taiyuan University of Science and Technology  
Chai Yuesheng Taiyuan University of Science and Technology  
Wang Feng Gujiao Yinghe Mg Trade Limited Company  
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Abstract:
      The Mg-13Zn-xCa-0.5Nd(x=3,4,5,6) alloys containing high-calcium have been prepared under the pretension of a mix gas atmosphere of Ar .The alloys composite were characterized by a variety of techniques: x-ray diffraction, optical metallurgical microscope, scanning electron microscope and mechanical property test. The performance of high Ca on microstructure and mechanical properties of alloy were investigated. The alloy was mainly composed of α-Mg matrix、α-Mg+Mg6Zn3Ca2 eutectic phase and a few amounts of secondary phase(Mg2Ca+Mg6Zn3Ca2)in as-cast state. The grain is extremely refined with the increase of Ca addition. After the solution treatment at 390 oC for 8 h and subsequent aging at 240 oC, the alloy exhibits greatly mechanical properties.The optimum mechanical property of the alloy is obtained by 4% Ca addition after T6 heat treatment. The ultimate tensile strength, yield strength and elongation of the alloy at peak-aged state are 108 MPa, 175 MPa and 6.10% at room temperature respectively. The good mechanical properties are mainly attributed to fine grain strengthening and second phase strengthenin.