DIFFUSION BONDING OF TiAl TO Ti AND TC4 ALLOY

金属学报(英文版), 2000, 13(1): 162-167.

DIFFUSION BONDING OF TiAl TO Ti AND TC4 ALLOY

P. He , J. H. Zhang , J. C. Feng and Y. Y. Qian (National Key Laboratory of Advanced Welding Production Technology , HIT , Harbin 150001 , China)

Keywords： diffusion bonding , null , null

TiAl was diffusion bonded to Ti and TC4 alloy in vacuum furnace. Results showed,at the TiAl-Ti interface,the reaction layer of stratification Ti3Al was formed closest to TiAl base,and the a phase and the α + βphase arised closest to Ti base at 1173K and 1573K respectively. The phase structure of TiAl/ and the phase structure of TiAlwere observed be- tween AiAl and TC4 under respetive bonding temperature.The fiacture at tensile testing occurred in the bond - line, producing very flat fracture surfaces with some pull-out of the TiAl materials.The ultimate tensile strengths of the joint were approximate to γ-TiAl base marterial.

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DIFFUSION BONDING OF TiAl TO Ti AND TC4 ALLOY

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