张忠明,黄正华,任伟伟,徐春杰,惠增哲.等通道转角挤压Mg-3.52Sn-3.32Al合金的组织与力学性能[J].稀有金属材料与工程,2019,48(2):385~393.[zhang zhongming,HUANG Zhenghua,Ren Weiwei,Xu Chunjie,Xi Zengzhe.Microstructure and tensile properties of solutionized Mg-3.52Sn-3.32Al alloy deformed by equal channel angular pressing[J].Rare Metal Materials and Engineering,2019,48(2):385~393.]
等通道转角挤压Mg-3.52Sn-3.32Al合金的组织与力学性能
投稿时间:2017-09-08  修订日期:2019-02-15
中文关键词:  镁-锡-铝合金  等通道转角挤压;组织;力学性能
基金项目:陕西省科技计划项目2010K10-08,陕西省教育厅科学研究计划项目2013JK0906,陕西省光电功能材料与器件重点实验室项目ZSKJ201302,广东省金属强韧化技术与应用重点实验室项目(2014B030301012),广东省高新技术产业化项目(2013B010102021),陕西省光电功能材料与器件重点实验室项目(ZSKJ201302)资助
中文摘要:
      采用等通道转角挤压(ECAP)Bc路径对固溶态Mg-3.52Sn-3.32Al合金分别挤压1、4和8道次。利用光学显微镜、扫描电子显微镜、透射电子显微镜和X射线衍射仪分析合金的组织和相组成,并测试了其室温拉伸力学性能。结果表明,经ECAP挤压后,固溶态合金组织中析出大量细小的Mg2Sn相和极少量的Mg17Al12相。随挤压道次增加,合金的综合力学性能先提高后降低。经4道次挤压后,合金的综合拉伸力学性能相对较佳,抗拉强度、伸长率和硬度分别达到250 MPa、20.5%和61.3 HV9.8,较未ECAP时分别提高43.7%、105%和26.9%。经ECAP挤压的合金室温拉伸断口均呈韧性断裂。等通道转角挤压Mg-3.52Sn-3.32Al合金的力学性能受晶粒尺寸、析出相以及组织织构的共同影响。
Microstructure and tensile properties of solutionized Mg-3.52Sn-3.32Al alloy deformed by equal channel angular pressing
英文关键词:magnesium-tin-aluminium alloy  equal channel angular pressing(ECAP)  microstructure  mechanical property
英文摘要:
      The solutionized Mg-3.52Sn-3.32Al(wt.%) alloy was processed by equal channel angular pressing (ECAP) via route Bc for 1, 4, and 8 passes, respectively. The microstructure and phase composition of the alloy were analyzed by optical microscope, scanning electron microscopy, transmission electron microscopy and X-ray diffraction, and the room-temperature mechanical properties were measured. The results show that many fine Mg2Sn particles and a few Mg17Al12 phases precipitate in the alloy after ECAP. The mechanical properties of the alloy first increase and then decrease gradually with increasing extrusion passes. The alloy possesses better mechanical properties after ECAP for four passes, the ultimate tensile strength, elongation and hardness increase to 250 MPa, 20.5% and 61.3 HV9.8 respectively, which is increased by 43.7%, 105% and 26.9% compared with the solutionized alloy. The room temperature fractograph of the ECAP processed alloy is ductile-fractured morphology under tensile condition.The mechanical properties of the ECAP processed Mg alloy is dependent on the grain size, precipitate and texture.
作者单位E-mail
张忠明 西安理工大学 zmzhang1@foxmail.com 
黄正华 广东省材料与加工研究所广东省金属强韧化技术与应用重点实验室  
任伟伟 西安理工大学  
徐春杰 西安理工大学  
惠增哲 西安工业大学  
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