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, 2008, 16(5): 717?726. [5] WANG Y H, LIN J P, XUA X J, HE Y H, WANG Y L, CHEN G L. Effect of fabrication process on microstructure of high Nb containing TiAl alloy[J]. Journal of Alloys and Compounds.... Effect of canned forging on microstructure of high Nb-containing TiAl alloy[J]. Journal of Materials Engineering, 2004(8): 21?24. [11] 李宝辉, 陈玉勇, 孔凡涛. Ti-45Al-5Nb-0.3Y合金的等温热变形模拟及包套锻造[J]. 航空材料学报, 2007......
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. ZHANG et al [10] indicated that, in the β-stabilized TiAl alloy, the high temperature α phase will transform to α+γ lamellar colonies when passing through the α+β+γ three-phase field with slow cooling...] CLEMENS H, CHLADIL H F, WALLGRAM W, ZICKLER G A, GERLING R, LISS K D, KREMMER S, GUTHER V, SMARSLY W. In and ex-situ investigations of the β-phase in a Nb and Mo containing γ-TiAl based alloy
and densification behavior of TiAl alloy. HE et al [12] studied the microstructural characteristics and densification behavior of high-Nb TiAl powder, and found that microstructure and properties...: 201-208. [16] CHENG Liang, CHANG Hui, TANG Bin, KOU Hong-chao, LI Jin-shan. Deformation and dynamic recrystallization behavior of a high Nb containing TiAl alloy [J]. Journal of Alloys and Compounds, 2013......
, LIN Jun-pin. Homogeneity of composition and structure for high Nb containing TiAl alloy ingots prepared by vacuum levitation melting[J]. Rare Metal Materials and Engineering, 2014, 43(12): 3063-3067. [5... for the melting of TiAl alloys. Key words: BaZrO3; TiAl; alloy melting; interface reaction TiAl 金属间化合物具有高比强度,高弹性模量,优良的抗蠕变,抗氧化,耐高温和阻燃性能,密度不到镍基合金的50%,被认为是850~1000 ℃范围内最值得关注的轻质高温结构材料[1].但TiAl 合金熔体具有较高的化学活性,高温下会......
properties such as low density, elevated-temperature strength, excellent oxidation and creep resistance [1-3]. Particularly, high Nb-containing TiAl alloy can withstand temperatures up to 800 °C...]. Conventional high Nb-containing TiAl alloys can only be deformed under isothermal conditions since only small volume fraction of β phase appears at hot working temperatures, which is not an economical......
Wettability of TiAl alloy melt on ceramic moulds in electromagnetic field LI Bang-sheng(李邦盛)1, LIU Ai-hui(刘爱辉)1, NAN Hai(南 海)2, BI Wei-sheng(毕维生)1, GUO Jing-jie(郭景杰)1, FU Heng-zhi(傅恒志)1 1... at the final stage. And the higher the ceramic chemical stability, the longer the nonreactive wetting time. Key words: TiAl alloy; ceramic; electromagnetic field; wettability; interfacial reaction ......
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