以Ti、Al等元素粉末为原料,采用快速烧结方法和无包套锻造法制备尺寸为φ50×10 mm的TiAl合金锻坯.快速烧结后,TiAl合金由TiAl、Ti3Al、B2、Ti和TiAl3相组成,并且该合金存在较多的孔隙,孔隙主要由偏扩散造成的;经过高温锻造后,其孔隙得到了有效的控制,相对密度达到93%;经过热处理后,该合金主要由TiAl和Ti3Al相组成,在室温下合金的屈服强度提高了110 MPa,达到480 MPa,室温延伸率到达0.83%;在700℃和750℃,其屈服强度分别为580 MPa和530 MPa,其延伸率分别为12%和27%.
参考文献
[1] | APPEL F;WAGNER R .Microstructure and deformation of two-phase V-titanium aluminides[J].Mat Sci Eng:R:Reports,1998,22(05):187-268. |
[2] | Dimiduk DM .Gamma titanium aluminide alloys--an assessment within the competition of aerospace structural materials[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1999(2):281-288. |
[3] | J.Yamaguchi;H.Inui .High-temperature structural intermetallics[J].Acta materialia,2000(1):307-322. |
[4] | 张永刚;韩雅芳;陈国良.金属间化合物材料[M].北京:国防工业出版社,2001:1008. |
[5] | LEE T K;MOSUNOV E I;HWANG S K.Consolidation of a gamma TiAl-Mn-Mo alloy by elemental powder metallurgy[J].MATERIALS SCIENCE & ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,1997(239-240):540-545. |
[6] | CHEN Y Y;SU Y J;KONG F T et al.Fabrication of Ti-43Al-5V-4Nb Intermetallic Compounds by Forging Using the Blended Elemental Powders[J].Advanced Materials Research,2011,308-310:796-799. |
[7] | TANG Z;WANG F;Wu W .Hot-corroxion behavior of TiAl-base intermetallics in molten salts[J].Oxidation of Metals,1999,51(03):235-250. |
[8] | WANG GX;DAHMS M .An overview:TiAl-based alloys prepared by elemental powder metallurgy[J].Powder Metallurgy International,1992,24(04):219-225. |
[9] | TETSUI T;Scripta Mater .Effects of high niobium addition on the mechanical prpperties and high-temperature deformability of gamma TiAl alloy[J].INTERMETALLICS,2002,10(03):239-245. |
[10] | SEO D Y;BEDDOES J;ZHAO L.The influence of aging on the microstructure and creep behavior of a γ-Ti-48% Al-2% W[J].Intermetallic Mater Sci Eng A,2002(329-331):737-748. |
[11] | A. M. Hodge;L. M. Hsiung;T. G. Nieh .Creep of nearly lamellar TiAl alloy containing W[J].Scripta materialia,2004(5):411-415. |
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%