钕对AM60镁合金显微组织和力学性能的影响
Effects of Nd on Microstructure and Mechanical Properties of AM60 Magnesium Alloy
摘 要
用OM、SEM、EDS、XRD和拉伸试验机等分析了添加稀土钕对AM60镁合金显微组织、断口形貌、析出相及力学性能的影响.结果表明:加入稀土钕能有效细化AM60镁合金的显微组织,使Mg17Al12相变少、变细;适量的稀土钕元素优先与合金中的铝元素反应生成颗粒状(小针状)的Al11Nd3相,能有效提高合金的抗拉强度、屈服强度和伸长率;过量的稀土钕则会消耗合金中更多的铝元素并导致针状Al11Nd3相粗化,使合金的力学性能下降;试验条件下,添加质量分数为0.9%钕的合金力学性能最佳,其抗拉强度为230 MPa,屈服强度为127 MPa,伸长率为14%,分别比AM60合金提高了28%,48%和1.8倍.
钕
显微组织
力学性能
AM60 magnesium alloy
Nd
microstructure
mechanical property
Abstract
The effects of the addition of Nd element to AM60 magnesium alloy on the microstructure,fractograph,mechanical properties were studied by means of OM,SEM,EDS and XRD.The results show that Nd refined the microstructure of AM60 alloy effectively,and decreased the amount and size of Mg17Al12 phase.Nd element took a priority to react with Al element over Mg,Mn and Zn,forming binary phase Al11Nd3 with high melting point.Certain amount of Nd increased the tensile strength,yield strength and elongation.With more addition,Nd would combine more Al in matrix and decrease the strengthening effect because Al11Nd3 phase would become coarsening.The mechanical poroerty tests indicate that AM60-0.9Nd alloy had the best properties.The maximum tensile strength,yield strength and elongation were 230 MPa,127 MPa and 14%,increased about 28%,48% and 1.8 times respectively,compared with those of AM60 alloy.
中图分类号 TG146.2 TG146.4
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(20271037,20471041);国家自然科学基金国际合作项目(50311140138)
收稿日期 2008/1/3
修改稿日期 2008/5/26
网络出版日期
作者单位点击查看
备注张俊远(1982-),男,河南开封人,硕士研究生.
引用该论文: ZHANG Jun-yuan,WANG She-bin,WANG Shuai,LI Xiao-bin,XU Bing-she. Effects of Nd on Microstructure and Mechanical Properties of AM60 Magnesium Alloy[J]. Materials for mechancial engineering, 2009, 33(2): 28～31
张俊远,王社斌,王帅,李晓斌,许并社. 钕对AM60镁合金显微组织和力学性能的影响[J]. 机械工程材料, 2009, 33(2): 28～31
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【2】Friedrich H,Schumann S.Research for a new age of magnesium in the automotive industry[J].Journal of Materials Processing Technology,2001,117:276-281.
【3】Zeng Rongchang,Ke Wei,Xu Yongbo,et al.Recent development and application of magnesium alloys[J].Acta Metallurgica Sinica,2001,37(7):673-685.
【4】Tian Zheng,Song Bo,Liu Yongbing.Application and developing of AM magnesium alloy in automobile industry[J].Automobile Technology and Material,2004(7):21-23.
【5】Peng Yinghong,Li Dayong,Wang Yingchun,et al.Numerical study on the low pressure die casting of AZ91D wheel hub[J].Materials Science Forum,2005,488/489:393-396.
【6】Lee Y C,Dahle A K,Sbjohn D H.The role of solute in grain refinement of magnesium[J].Metallurgical and Materials Transaction,2000,31A:2895-2906.
【7】Yosuke Tamura,Tadashi Haitani,Eiji Yano.Grain refinement of high-purity Mg-Al alloy ingots and influences of minoramounts of iron and manganese on cast grain size[J].Materials Transactions,2002,43(11):2784-2788.
【8】Rosalbino F,Angelini E,De Negri S,et al.Effect of erbium addition on the corrosion behaviour of Mg-Al alloys[J].Intermetallics,2005,13:55-60.
【9】Wang Mingxing,Zhou Hong,Wang Lin.Effect of yttriumand cerium addition on microstructure and mechanical properties of AM50 magnesium alloy[J].Journal of Rare Earths,2007,25:233-237.
【10】Liu Ying,Chen Weiping,Zhang Weiwen.Effects of RE on microstructures and mechanical properties of hot-extruded AZ31 magnesium alloy[J].Journal of Rare Earths,2004,22(4):527-532.
【11】Wang Yingxin,Guan Shaokang,Zeng Xiaoqin,et al.Effects of RE on the microstructure and mechanical properties of Mg-8Zn-4Al magnesium alloy[J].Materials Science and Engineering,2006,A416:109-118.
【12】《轻合金材料加工手册》编写组.轻合金材料加工手册[M].北京:冶金工业出版社,1980:367.
【13】周海涛,曾小勤,刘文法,等.稀土铈对AZ61变形镁合金组织和性能的影响[J].中国有色金属学报,2004,14(1):99-104.
【14】Wang Yingxin,Guan Shaokang,Zeng Xiaoqin,et al.Effects of RE on the microstructure of Mg-8Zn-4Al magnesium alloys[J].Journal of Shanghai Jiaotong University,2005,E10(3):298-302.
【15】Huang Xiaofeng,Wang Qudong,Yuan Guanyin,et al.Influence of rare earth on mechanical properties and high temperature creep properties of AM50 magnesium alloy[J].Journal of the Chinese Rare Earth Society,2004,22(4):493-496.
【16】Zhao Peng,Wang Qudong,Zhai Chunquan,et al.Effects of strontium and titanium on the microstructure,tensile properties and creep behavior of AM50 alloys[J].Materials Science and Engineering,2007,A444:318-326.声明为适应我国信息化建设,扩大本刊及作者知识信息交流渠道,本刊已被《中国学术期刊网络出版总库》及CNKI系列数据库收录,其作者文章著作权使用费与本刊稿酬一次性给付.如作者不同意文章被收录,请在来稿时向本刊声明,本刊将作适当处理.欢迎订阅欢迎投稿欢迎刊登广告和信息(下转第页)
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