Volume 29 Issue 3
Mar.  2003
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Wu Guoqing, Huang Zheng, Lin Jianguo, et al. Structure and Hardness Changes of Laser Melted TiAl AlloySurface During Continuous Heating[J]. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(3): 241-243. (in Chinese)
Citation: Wu Guoqing, Huang Zheng, Lin Jianguo, et al. Structure and Hardness Changes of Laser Melted TiAl AlloySurface During Continuous Heating[J]. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(3): 241-243. (in Chinese)

Structure and Hardness Changes of Laser Melted TiAl AlloySurface During Continuous Heating

  • Received Date: 10 Oct 2001
  • Publish Date: 31 Mar 2003
  • Structural transformation and hardness variation in the laser melted TiAl intermetallic alloy surface during continuous heating were studied systemically. The results indicated that, during continuous heating from 50 to 1000℃ with a heating rate of 10℃/min, α2→γ phase transformation in the laser melted TiAl intermetallic alloy surface takes place at about 750℃, and the dendritic structure is transformed into fine-grained structure at about 860℃, correspondingly, variations in the hardness of the laser melted TiAl intermetallic alloy surface were also measured. The fine grain structure was considered to be a good basis of superplastic/diffusion bonding.

     

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  • [1] 林建国, 吴国清, 黄 正.γ-TiAl 基合金超塑扩散连接[J]. 金属学报,2001, 37 (2):221~224 Lin Jianguo,Wu Guoqing,Huang Zheng. Superplastic forming/diffusion bonding of γ-TiAl based alloy [J]. Acta Metallurgica Sinica, 2001,37(2):221~224(in Chinese) [2] Wu G Q, Huang Z. Superplastic forming/diffusion bonding of laser surface melted TiAl intermetallic alloy [J]. Scripta Mat, 2001, 45 (8):895~899 [3] Kim Y-W. Ordered intermetallic alloys, part Ⅲ:gamma titanium aluminides[J]. JOM,1994(7):30~39 [4] Deevi S. Intermetallics for the third millennium[J]. Advanced Materials & Processes, 1999(9):44~47 [5] Tiziant A, Giorddano L, Ramous E. Laser surface treatment by rapid solidification . In:Lasers in Materials Processing-American Society for Metals . OH:Metals Park, 1983. 108~114
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