采用真空电弧炉熔炼方法制备了添加稀土元素Gd的Ni-33Al-28Cr-5.9Mo-0.1Hf(原子分数,%)合金,运用扫描电镜(SEM)、电子探针显微分析(EPMA)及透射电镜(TEM)分析了该合金的微观组织形貌和相组成,采用Gleeble 1500进行了室温及高温压缩性能测试.研究表明,稀土元素Gd极少部分固溶于NiAl与Cr(Mo)相中,大部分参与形成Heusler相.适量Gd可细化共晶合金的组织,即减小NiAl/Or(Mo)共晶胞的尺寸及共晶层片的间距,因此提高了合金的室温压缩屈服强度与压缩塑性,但对1373 K时的压缩强度影响较小.当Gd含量达到0.1(质量分数,%)时,共晶胞界宽化,且胞界的Cr(Mo)相出现粗化及不规则分布现象,导致室温和高温压缩性能降低.
参考文献
| [1] | Noebe R D,Bowman R R,Nathal M V.Int Mater Rev,1993; 38:193 |
| [2] | Johnson D R,Chen X F,Oliver B F,Noebe R D,Whit-tenberger J D.Intermetallics,1995; 3:99 |
| [3] | Darolia R.JOM,1991; 43:44 |
| [4] | Whittenberger J D,Locci I E,Darolia R,Bowman R R.Mater Sci Eng,1999; A268:165 |
| [5] | Guo J T,Cui C Y,Chen Y X,Li D X,Ye H Q.Intermetallics,2001; 9:287 |
| [6] | Guo J T,Huai K W,Gao Q,Ren W L,Li G S.Intermetallics,2007; 15:727 |
| [7] | Guo J T,Yuan C,Hou J S.Acta Metall Sin,2008; 44:513(郭建亭,袁超,侯介山.金属学报.2008;44:513) |
| [8] | Fu H M,Wang H,Zhang H F,Hu Z Q.Scr Mater,2006;55:147 |
| [9] | Li S,Zhao D Q,Pan M X,Wang W H.J Non-Cryst Solids,2005; 351:2568 |
| [10] | Xu X,Chen L Y,Zhang G Q,Wang L N,Jiang J Z.Intermetallics,2007; 15:1066 |
| [11] | Zheng Q,Cheng S,Strader J H,Ma E,Xu J.Scr Mater,2007; 56:161 |
| [12] | Xu J W.J Alloys Compd,2008; 448:331 |
| [13] | Wu X,Song D,Xia K.Mater Sci Eng,2002; A329-331:821 |
| [14] | Li W,Inkson B,Horita Z,Xia K.Intermetallics,2000; 8:519 |
| [15] | Xia K,Wu X,Song D.Acta Mater,2004; 52:841 |
| [16] | Xia K,Li W,Liu C.Scr Mater,1999; 41:67 |
| [17] | Walter J L,Cline H E.Metall Trans,1970; 1:1221 |
| [18] | George E P,Liu C T.J Mater Res,1990; 5:754 |
| [19] | Briant C L.Metall Trans,1990; 21A:2339 |
| [20] | Chen X F,Johnson D R,Noebe R D,Oliver B F.J Mater Res,1995; 10:1159 |
| [21] | Pop V,Coldea M,Neumann M,Chiuzbaian S,Todoran D.J Alloys Compd,2002; 333:1 |
| [22] | Fox A G,Tabbernor M A.Acta Metall Mater,1991; 39:669 |
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