马德志,王 峰,王 志,刘 正,毛萍莉.镁基准晶对AM50合金组织与性能的影响[J].稀有金属材料与工程,2018,47(7):2166~2171.[Ma Dezhi,Wang Feng,Wang Zhi,Liu Zheng,Mao Pingli.Effect of Mg-Based Quasicrystals Addition on Microstructure and Mechanical Properties of AM50 Magnesium Alloy[J].Rare Metal Materials and Engineering,2018,47(7):2166~2171.]
镁基准晶对AM50合金组织与性能的影响
投稿时间:2016-07-26  修订日期:2016-11-11
中文关键词:  准晶增强  AM50合金  显微组织  力学性能
基金项目:国家自然科学基金(51504153),国家自然科学基金(51571145),辽宁省自然科学基金(201602548)
中文摘要:
      通过普通凝固方法制备含高体积分数准晶相的Mg-48Zn-13Y准晶中间合金。利用OM,SEM,EDS,XRD及拉伸实验研究了MZY准晶对AM50合金显微组织及力学性能的影响。结果表明:向AM50合金中添加MZY准晶后,组织中可保留Mg3Zn6Y准晶相,并使合金组织得到明显地细化;组织中β-Mg17Al12相的数量减少,且形貌由粗大连续网状向断续条状及颗粒状转变。其中,当MZY准晶加入量为6%时,合金组织最为细小,合金的抗拉强度、屈服强度及伸长率达到峰值,分别为202.92MPa、100.57MPa和10.8%,其比AM50合金分别提高了24.59%、74.9%和66.15%。外加MZY准晶改善AM50合金力学性能的原因可归结于组织细化、β-Mg17Al12相数量及形貌的改善、以及与镁合金基体具有良好润湿性的准晶相的弥散强化作用。
Effect of Mg-Based Quasicrystals Addition on Microstructure and Mechanical Properties of AM50 Magnesium Alloy
英文关键词:quasicrystal strengthened  AM50 alloy  microstructure  mechanical properties
英文摘要:
      The Mg-48Zn-13Y quasicrystal master alloy with high volume fraction of the quasicrystalline phase was prepared by conventional solidification method. The influences of the MZY quasicrystal on microstructures and properties of AM50 alloys were investigated by OM, SEM, EDS, XRD and tensile tests. The results indicated that addition of the MZY quasicrystal to AM50 alloy, the Mg3Zn6Y quasicrystal phase could be left well in AM50 matrix alloy, and the microstructures were obviously refined. The β phase in the microstructures was changed from coarse and continuous to discontinuous strip and granular, and the amount was decreased. When the content of the MZY quasicrystal is up to 6%, the microstructure was greatly refined, and the ultimate tensile strength, yield strength and elongation of the alloy reached to the maximum, 206.63 MPa, 92.50 MPa and 10.04%, respectively. Compared with AM50 alloy, it is improved by 24.59%, 74.9% and 66.15%, respectively. Mechanical properties of AM50 magnesium alloy can be improved significantly by addition of the MZY quasicrystal, which results from the microstructure refinement, the optimization of the morphology and amount of the β phase and the dispersion strengthening effect of the quasicrystal phase has good wettability with the magnesium alloy substrate.
作者单位E-mail
马德志 沈阳工业大学 mdz0912@126.com 
王 峰 沈阳工业大学 wf9709@126.com 
王 志 沈阳工业大学  
刘 正 沈阳工业大学  
毛萍莉 沈阳工业大学  
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