研究了RE对Mg-8Zn-4Al-0.3Mn铸造镁合金显微组织的影响.结果表明: Mg-8Zn-4Al-0.3Mn-xRE铸造镁合金的显微组织主要由α(Mg)基体、φ(Al2Mg5Zn2)相、τ(Mg32(Al, Zn)49)相和Mg3Al4Zn2RE相组成.随RE加入量的增加, 合金晶界上三元相的形态由半连续网状改变为颗粒状, 三元相的分布逐渐变得弥散而均匀.晶界上针状或棒状Mg3Al4Zn2RE相的量也随着RE加入量的增加而增加.加入1.5%的RE可显著细化合金的铸态组织, 晶粒大小由120～130μm减小到40～50μm.合金的显微硬度值随着RE加入量的增加而增加.
参考文献
| [1] | 张鹏,曾大本.异军突起的镁合金压铸[J].特种铸造及有色合金,2000(06):55-57. |
| [2] | 袁广银;孙扬善;张为民 .Bi对铸造镁合金组织和力学性能的影响[J].铸造,1998,5:5-7. |
| [3] | 闵学刚;孙扬善;袁广银 等.Bi、Sb、Ca对SiAZ91合金的组织和性能的影响[J].中国有色金属学报,2002(12):166-171. |
| [4] | Sn对镁合金显微组织和力学性能的影响[J].中国有色金属学报,1999(01):55. |
| [5] | Yuan Guangyin;Sun Yangshan;Ding Wenjiang .Effects of bismuth and antimony additions on the microstructure and mechanical properties of AZ91 magnesium alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2001(1/2):38-44. |
| [6] | WANG Qu-dong;CHEN Wen-zhou;ZEN Xiao-qin et al.Effect of Ca addition on the microstructure and mechanical properties of AZ91 magnesium alloys[J].Journal of Materials Science,2001,36:3035-3040. |
| [7] | LU Yi-zhen;WANG Qu-dong;ZENG Xiao qin et al.Effects of rare earth on the microstructure properties and fracture behavior of Mg-Al alloys[J].Materials Science and Engineering A,2000,A278:66-76. |
| [8] | Lou A;ShinodaT .SAE Technical Paper Series[R].,1999,980086:1. |
| [9] | Lou A;Shinoda T.Development of a creep-resistant magnesium alloy for die casting applications[A].Werkstoff-Informationsgeserschaft,Wolfsburg,Germany,1998:151-156. |
| [10] | Avedusian M M;Baker H.Magnesium and Magnesium Alloys, ASM Specialty Handbook[M].Materials Park, OH: ASM International,1999 |
| [11] | Z. ZHANG;R. TREMBLAY .SOLIDIFICATION MICROSTRUCTURE OF ZA102, ZA104 AND ZA106 MAGNESIUM ALLOYS AND ITS EFFECT ON CREEP DEFORMATION[J].Canadian Metallurgical Quarterly,2000(4):503-512. |
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