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The superplasticity of Ti_3Al 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.Ti_3Al base al-loys were bonded by diffusion bonding technology and good joints were created,the simulatedspecimens were performed by SPF/DB process.
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-21Nb-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 ° C at the same strain rate. Ti_3Al base al-loys were bonded by diffusion bonding technology and good joints were created, the simulated specie were performed by SPF / DB process.