研究了铸造Ti-47Al-XRu(at%)(X=0.5,1,3)合金的显微组织.结果表明,Ru与Cr相似,是很强的β稳定元素,促进β2相形成.β2相是含Ru量高达10at%的富Ru相.含1at%Ru的合金在1160～1200℃温度范围热处理时不断析出粒状次生β2相,破坏了γ+α2片状组织,同时形成了新的γ晶粒.经1200℃,48h处理后可得到平均晶粒尺寸小于60μm的γ晶,因此,Ti-47Al-1Ru合金是可热处理细化晶粒的铸造合金.当Ru量增加至3at%时,合金难于热处理细化晶粒,而且合金明显脆化.
参考文献
| [1] | London B;Larsen D E;Wheeler D A.Investment cast gamma titanium aluminidealloys[A].TMS,1993:151. |
| [2] | Austin C M;Kelly T J.Progress in implantation of cast gamma titanium aluminide[A].TMS,1995:21. |
| [3] | Huang S C .Titanium aluminum alloys modified by chromium and niobium and method of preparation[P].USP:4879092,1989. |
| [4] | Austin C M;Kelly T J.Development and implementation status of cast gamma titanium aluminide[A].TMS,1993:143. |
| [5] | Austin C M;Kelly T J.Gas turbine engine implementation of gamma titanium aluminide[A].TMS,1996:539. |
| [6] | 赵林若;Tangri K .Cr对Ti3Al+TiAl合金显微组织的影响[J].金属学报,1994,30(03):A97. |
| [7] | Kawaura H;Nishino K;Saito T.New surface treatment using a fluidized bed furnacefor improving oxidation resistance of TiAl-base alloys[A].TMS,1997:377. |
| [8] | Tomasi A;Gialanella S;Orsini P G et al.Oxidation behaviour of intermetallic compounds based on Ti-Al system[J].Materials Research Society Symposium Proceedings,1995,364:999. |
| [9] | Mckee D W;Huang S C .Oxidation behavior of gamma titanium aluminide alloys underthermal cycling conditions[J].Corrosion Science,1992,33:1899. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%