稀土钇对镁锌合金组织和性能的影响
Effects of Y on Microstructure and Mechanical Properties of Mg-Zn Alloys
摘 要
采用X射线衍射和光学显微镜及电子拉伸试验机、维氏硬度计、冲击试验机等分析研究了Mg-3Zn-xY(x＝1.5,3,6)合金显微组织对力学性能的影响.结果表明：在基体中和晶界处分布的弥散质点随钇含量的增加而增多;合金中二次相的种类取决于锌、钇质量比,随着钇含量的增加,合金中的二次相依次从I相＋W相到W相＋H相、H相转变,晶间组织的形态也由细线状向网状转变;合金的抗拉强度、硬度、冲击韧度随着钇含量的增加而提高,塑性则逐渐下降;当钇含量达到6%后合金的综合力学性能下降.
稀土
显微组织
力学性能
Mg-Zn-Y alloy
rare earth
microstructure
mechanical property
Abstract
Microstructure and mechanical properties of Mg-3Zn-xY(x=1.5,3,6) alloys were investigated.Results indicate that the amount of particles in the matrix and at grain boundaries increase with increasing yttrium content.The type of the second phase in the alloy depend upon the Zn/Y ratio,as the Y content increases,the second phase is transformed from I-phase + W-phase to W-phase + H-phase ,and to H-phase.The shape of second phases at the grain boundaries transformed from short rodlikes to reticular particles.With the Y content increasing,the alloy’s tensile strength,hardness and impact toughness increases,but the plasticity decreases.The mechanical properties descended when the Y content is higher than 6wt%.
中图分类号 TP204
所属栏目
基金项目
收稿日期 2006/10/13
修改稿日期 2007/5/29
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备注杨淑启(1967-),男,山东济宁人,副教授.
引用该论文: YANG Shu-qi,GUO Hua-ming,LIU Zi-li. Effects of Y on Microstructure and Mechanical Properties of Mg-Zn Alloys[J]. Materials for mechancial engineering, 2007, 31(8): 60～63
杨淑启,郭华明,刘子利. 稀土钇对镁锌合金组织和性能的影响[J]. 机械工程材料, 2007, 31(8): 60～63
被引情况:
【1】张强,余新泉,陈君,冯秀梅,沈睿,张发伦, "稀土钇含量对B10铜合金组织和性能的影响",机械工程材料 39, 14-19(2015)
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参考文献
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【2】刘子利,丁文江,袁广银,等.镁铝基耐热铸造镁合金的进展[J].机械工程材料,2001,25(11):1-4.
【3】吉泽升,李德锋,孙荣滨.镁合金压铸技术的发展现状[J].轻合金加工技术,2001(12):1-4.
【4】虞觉奇,易文质.二元合金状态图集[M].上海:上海科学技术出版社,1987.
【5】Luo Z P,Zhang S Q.High-resolution electron microscopy on the X-Mg12ZnY phase in a high strength Mg-Zn-Zr-Y magnesium alloy[J].Journal of Materials Science Letters,2000,19:813-815.
【6】Padezhnova E M,Mel’nik E V,Miliyevskiy R A,et al.Investigation of the Mg-Zn-Y system[J].Russian Metallurgy,1982(4):185-188.
【7】Zhang Ya,Zeng Xiaoqin,Liu Liufa,et al.Effects of yttrium on microstructure and mechanical properties of hot-extruded Mg-Zn-Y-Zr alloys[J].Materials Science and Engineering A,2004(373):320-327.
【8】Singh Alok,Tsai A P.A new orientation relationship OR4 of icosahedral phase with magnesium matrix in Mg-Zn-Y alloys[J].Scripta Materialia,2005,53:1083-1087.
【9】Singh Alok,Watanabe M,Kato A,et al.Crystallographic orientations and interfaces of icosahedral quasicrystalline phase growing on cubic W phase in Mg-Zn-Y alloys[J].Materials Science and Engineering A,2005(397):22-34.
【10】Lee Ju Yeon,Kim Do Hyung,Lim Hyun Kyu,et al.Effects of Zn/Y ratio on microstructure and mechanical properties of Mg-Zn-Y alloys[J].Materials Letters,2005,59:3801-3805.
【11】周公度,段连运.结构化学基础(第三版)[M].北京:北京大学出版社,2002.
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