Superplasticity and Diffusion Bonding of Ti₃AI Intermetallic Compounds

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

摘 要：<正> The superplasticity of Ti₃Al intermetallic compounds has been investigated in this paper.TheTi-14Al-21Nb ternary alloy showed 477% elongation at the strain rate of 1.49×10^-5 s^-1 and950℃.The elongation of Ti-14Al-21 Nb-3Mo-1V quinary alloy approached to 573% at the strainrate 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.Ti₃Al base al-loys were bonded by diffusion bonding technology and good joints were created,the simulatedspecimens were performed by SPF/DB process.

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