添加Ti降低了NiAl-Cr(Mo)共晶合金凝固过程中NiAl/Cr(Mo)共晶生长速度,导致NiAl/Cr(Mo)胞状共晶组织的粗化,并因合金偏离共晶成分而促进先共晶NiAl相的形成.在添加Ti的NiAl-Cr(Mo)共晶合金中,Ti主要分布在基体NiAl相中.随着Ti含量的提高,过饱和的NiAl(Ti)基体发生分解,促进了Ni2AlTi相的形成,并且NiAl/Cr(Mo)胞状共晶组织发生退化.Ni-33Al-28Cr-3Mo-5Ti共晶合金的NiAl基体中析出细小的Cr(Mo)相,Cr(Mo)共晶相中析出细小的NiAl相.
参考文献
| [1] | S.V.Raj,I.E.Locci,J.D.Whittenberger,in Structural Intermetallics 2001,Development and evalution of directionally-solidified NiAl/(Cr,Mo)-based eutectic alloys for airfoil applications,edited by K.J.Hemker,D.M.Dimiduk,H.Clemens,R.Darolia,H.Inui,J.M.Larsen,V.K.Sikka,M.Thomas,J.D.Whittenberger (Warrendale,PA,TMS,2001) p.785 |
| [2] | J.D.Whittenberger,I.E.Loeei,S.V.Raj,J.A.Salem,Ele-vated temperature strength and room-temperature tough-ness of directionally solidified Ni-33Al-33Cr-1Mo,Metal.Mater.Trans.,33A,1385(2002) |
| [3] | W.S.Walston,R.Darolia,in Structural Intermetallics 2001,Properties and application of NiA1 Eutectic Al-loys,edited by K.J.Hemker,D.M.Dimiduk,H.Clemens,R.Darolia,H.Inui,J.M.Larsen,V.K.Sikka,M.Thomas,J.D.Whittenberger (Warrendale,PA,TMS,2001) p.735 |
| [4] | R.Darolia.Ductility and fracture toughness issues related to implementation of NiA1 for gas turbine applications,Intermetallics,8,1321(2000) |
| [5] | GUO Jianting,CUI Chuanyong,ZHOU Lanzhang,LI Gu-song,Investigation on intermetallic NiAl-Cr(Mo,Hf) al-loys,Acta Metal.Sin.,38,1157(2002)(郭建亭,崔传勇,周兰章,李谷松,金属间化合物NiAl-Cr(Mo,Hf)合金的研究,金属学报,38,1157(2002)) |
| [6] | C.Y.Cui,J.T.Guo,Y.H.Qi,H.Q.Ye,Deformation behavior and microstructure of DS NiAl/Gr(Mo) alloy containing Hf,Intermetallics,10,1001(2002) |
| [7] | R.S.Polvani,W.S.Tzeng,P.R.Strutt,High temperature creep in semi--coherent NiAl-Ni2AlTi alloy,Metall.Trans.,7A,33(1976) |
| [8] | XIAO Xuan,GUO Jianting,YU Halpeng,Microstructure and mechanical properties of a cast NiAl(Ti)-Cr(Mo) eu-tectic alloy,Aeta Metal.Sin.,42(10),1031(2006)(肖旋,郭建亭,于海朋,NiAl(Ti)-Cr(Mo)共晶合金的微观组织和力学性能,金属学报,42(10),1031(2006)) |
| [9] | S.V.Raj,I.E.Locei,Microstructural characterization of a directionally-solidified Ni-33(at.%)Al-31Cr-3Mo eutectic alloy as a function of withdrawal rate,Intermetallics,9,217(2001) |
| [10] | J.D.Whittenberger,S.V.Raj,I.E.Locci,J.A.Salem,Effect of growth rate on elevated temperature plastic flow and room temperature fracture toughness of directionally so-lidified NiAl-31Cr-3Mo,Intermetallics,7,1159(1999) |
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