MECHANICAL TWINNING IN DOUBLE-PHASE TiAl BASE ALLOY WITH A LAMELLAR STRUCTURE

Acta Metall Sin

1996, Vol. 32

Issue (2): 154-158 DOI:

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MECHANICAL TWINNING IN DOUBLE-PHASE TiAl BASE ALLOY WITH A LAMELLAR STRUCTURE

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LIANG Wei; LI Qiang; LIU Huiting; YANG Dezhuang (Taiyuan University of Technology; Taiyuan 030024)(Harbin Institute of Technology; Harbin 15000l)(Manuscript received 1995-05-24; in revised form 1995-11-03). MECHANICAL TWINNING IN DOUBLE-PHASE TiAl BASE ALLOY WITH A LAMELLAR STRUCTURE. Acta Metall Sin, 1996, 32(2): 154-158.

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Abstract Microstructures of Ti-48Al alloy deformed under compression at RT, 600℃ and 800℃ have been studied by TEM. The result shows that the intersection of mechanical twin and lamellar boundary is along〈101]. But the mechanical twinning intersecting lamellar boundary along〈110] can hardly occur during compression deformation whether at room temperature or at high temperatures.Correspondent: LIANG Wei, Centre of Testing and Measurement, Taiyuan University of Technology, Taiyuan030024

Key words: TiAl base alloy γ-phase mechanical twinning

Received: 18 February 1996

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1ShechtmanD,BlackburnMJ,LipsittHA．MetallTrans,1974;5:13732LipsittHA,ShechtmanD,SchafrikRE,MetallTrans,1975:6A(11):19913DeveHE,EvansAGActaMetallMater,1991;39:11714FarencS,CoujouA,CouretA．PhilMagA,1993;67:1275HugG,LoiseauA,VeyssiereP．PhilMagA,1988;57:4996WardleS,PhanI,HugG．PhilMagA,1993;67:4977SunYQ,HazzledinePM,ChristianGW,PhilMagA,1993:68:4718梁伟,刘会亭,陆路,杨德庄,李强,康五星.金属热处理学报,1995;16(3):15T

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