J Mater Sci Technol ›› 1993, Vol. 9 ›› Issue (1): 53-56.

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Superplasticity and Diffusion Bonding of Ti_3AI Intermetallic Compounds

Yi GUO Peng LIU Yiwen WU Zijing HE Dong LI Institute of Metal Research,Academia Sinica,Shenyang,110015,China   

  • Received:1993-01-28 Revised:1993-01-28 Online:1993-01-28 Published:2009-10-10

Abstract: The superplasticity of Ti_3Al intermetallic compounds has been investigated in this paper.The Ti-14Al-21Nb ternary alloy showed 477% elongation at the strain rate of 1.49×10~(-5) s~(-1) and 950℃.The elongation of Ti-14Al-21 Nb-3Mo-1V quinary alloy approached to 573% at the strain rate of 4.52×10~(-5) s~(-1) and the same temperature,and it was found that the elongation value in- creased to 1096.4%as temperature was raised up to 980℃ at the same strain rate.Ti_3Al base al- loys were bonded by diffusion bonding technology and good joints were created,the simulated specimens were performed by SPF/DB process.

Key words: superplasticity, Ti_3Al base alloy, diffusion bonding, superplastic forming