李龙,张磊,杨伟

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

采用重力铸造方法制备了3种Mg-6Zn-(1.6-x)Gd-xEr-0.5Zr(x=0.4,0.8和1.2)合金，研究了3种铸态合金的显微组织和拉伸性能。结果表明：3种合金的组织均主要由α-Mg基体和准晶相组成。随着Er含量的增加，合金中初生α-Mg晶粒逐渐细化，其形貌由等轴枝晶状转变为蔷薇状，同时呈不连续网状分布在晶界处的第二相也有逐渐断开的趋势。随着Er含量的增加，合金的拉伸性能逐渐提高。当Er含量为1.2 mass%时，Mg-6Zn-0.4Gd-1.2Er-0.5Zr合金的极限抗拉强度和伸长率分别为209 MPa和10.4%,相较于Mg-6Zn-1.2Gd-0.4Er-0.5Zr合金提升了27.4%和33.3%。

关键词(KeyWords)： Mg-Zn-Gd-Er合金;准晶相;组织;拉伸性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52061032);; 江西省自然科学基金(20181BAB206005)

作者(Author): 李龙,张磊,杨伟

DOI: 10.13289/j.issn.1009-6264.2023-0142

参考文献(References)：

• [1] 王建利，裴娟，袁姣娜，等.Sn元素对生物医用镁合金Mg-4.5Zn-Sn显微组织和耐蚀性能的影响[J].材料热处理学报，2018,39(6):26-34.WANG Jian-li,PEI Juan,YUAN Jiao-na,et al.Effect of Sn element on microstructure and corrosion resistance of biomedical Mg-4.5Zn-Sn alloys[J].Transactions of Materials and Heat Treatment,2018,39(6):26-34.
• [2] 王武孝，刘雪雍，王娜，等.超声处理对Mg-9Al-Zn-0.6Ce-1.2Ca镁合金组织及耐蚀性的影响[J].材料热处理学报，2019,40(1):44-49.WANG Wu-xiao,LIU Xue-yong,WANG Na,et al.Effects of ultrasonic treatment on microstructure and corrosion resistance of Mg-9Al-Zn-0.6Ce-1.2Ca magnesium alloy[J].Transactions of Materials and Heat Treatment,2019,40(1):44-49.
• [3] Zhang E,Yang L,Xu J,et al.Microstructure,mechanical properties and bio-corrosion properties of Mg-Si(-Ca,Zn) alloy for biomedical application[J].Acta Biomaterialia,2010,6(5):1756-1762.
• [4] Wang L,Jiang J,Yuan T,et al.Recent progress on corrosion behavior and mechanism of Mg-RE based alloys with long period stacking ordered structure[J].Metals and Materials International,2020,26(5):551-563.
• [5] Lyu J,Kim J,Liao H,et al.Effect of substitution of Zn with Ni on microstructure evolution and mechanical properties of LPSO dominant Mg-Y-Zn alloys[J].Materials Science and Engineering A,2020,773:138735.
• [6] Wang D,Zhang W,Zong X,et al.Abundant long period stacking ordered structure induced by Ni addition into Mg-Gd-Zn alloy[J].Materials Science and Engineering A,2014,618:355-358.
• [7] Liao H,Kim J,Lee T,et al.Effect of heat treatment on LPSO morphology and mechanical properties of Mg-Zn-Y-Gd alloys[J].Journal of Magnesium and Alloys,2020,8(4):1120-1127.
• [8] Ben-Hamu G,Eliezer D,Shin K S.The role of Mg2Si on the corrosion behavior of wrought Mg-Zn-Mn alloy[J].Intermetallics,2008,16:860-867.
• [9] Han D,Chen H,Zang Q,et al.Effect of solution treatment on microstructure and properties of Mg-6Gd-3Y-1.5Zn-0.6Zr alloy[J].Materials Characterization,2020,163:110295.
• [10] Wang Y,Zhang Y,Wang P,et al.Effect of LPSO phases and aged-precipitations on corrosion behavior of as-forged Mg-6Gd-2Y-1Zn-0.3Zr alloy[J].Journal of Materials Research and Technology,2020,9(4):7087-7099.
• [11] Liao H,Kim J,Lee T,et al.Effect of heat treatment on LPSO morphology and mechanical properties of Mg-Zn-Y-Gd alloys[J].Journal of Magnesium and Alloys,2020,8(4):1120-1127.
• [12] Wang D,Wu H,Wu R,et al.The transformation of LPSO type in Mg-4Y-2Er-2Zn-0.6Zr and its response to the mechanical properties and damping capacities[J].Journal of Magnesium and Alloys,2020,8(3):793-798.
• [13] Luo Z P,Zhang S Q.High-resolution electron microscopy on the X-Mg12ZnY phase in a high strength Mg-Zn-Ti-Y magnesium alloy[J].Journal of Materials Science Letters,2000,19:813-815.
• [14] Kawamura Y,Hayashi K,Inoue A,et al.Rapidly solidified powder metallurgy Mg97ZnlY2 alloys with excellent tensile yield strength above 600 MPa[J].Materials Transactions,2001,42:1171.
• [15] Wang Y,Zhang Y,Wang P,et al.Effect of LPSO phases and aged-precipitations on corrosion behavior of as-forged Mg-6Gd-2Y-1Zn-0.3Zr alloy[J].Journal of Materials Research and Technology,2020,9(4):7087-7099.
• [16] Du X H,Duan G S,Hong M,et al.Effect of V on the microstructure and mechanical properties of Mg-10Er-2Cu alloy with a long period stacking ordered structure[J].Materials Letters,2014,122(5):312-314.
• [17] Yuan G Y,Liu Y,Ding W J,et al.Effects of extrusion on the microstructure and mechanical properties of Mg-Zn-Gd alloy reinforced with quasicrystalline particles[J].Materials Science and Engineering A,2008,474:348-354.
• [18] Zhang L,Jin F,Zhan W,et al.Microstructure and mechanical properties of Mg-Zn-Y alloy under a steady magnetic field[J].Materials Science and Technology,2017,33(18):2197-2202.
• [19] Liu Y,Yuan G,Ding W,et al.Deformation behavior of Mg-Zn-Gd-based alloys reinforced with quasicrystal and Laves phases at elevated temperatures[J].Journal of Alloys and Compounds,2007,427(1/2):160-165.
• [20] Liu K,Wang Q,Du W,et al.Failure mechanism of as-cast Mg-6Zn-2Er alloy during tensil test at room temperature[J].Transactions of Nonferrous Metals Society of China,2013,23:3193-3199.
• [21] Liu K,Sun C,Wang Z,et al.Microstructure,texture and mechanical properties of Mg-Zn-Er alloys containing I-phase and W-phase simultaneously[J].Journal of Alloys and Compounds,2016,665:76-85.
• [22] Wu A R,Xia C Q.Study of the microstructure and mechanical properties of Mg-rare earth alloys[J].Materials Design,2007,28:1963-1967.
• [23] Rokhlin L L,Dobatkina T V.Nikitina N I.Constitution and properties of the ternary magnesium alloys containing two rare-earth metals of different subgroups[J].Materials Science Forum,2003,419-422:291-296.
• [24] Trojanova Z,Donic T,Lukac P,et al.Tensile and fracture properties of an Mg-RE-Zn alloy at elevated temperatures[J].Journal of Rare Earths,2014,32(6):564-572.
• [25] Chen X,Ning S,Wang A,et al.Microstructure,mechanical properties and corrosion behavior of quasicrystal-reinforced Mg-Zn-Y alloy subjected to dual-frequency ultrasonic field[J].Corrosion Science,2020,163:108289.

文章评论(Comment)：