MICROSTRUCTURE AND PROPERTIES OF Mn-CONTAINING TiAI ALLOYS

Abstract

Abstract: The microstructure of Ti-33wt-% Al-(1.6-4.5)wt-% Mn alloys are composed of γ+α_2 phases,but the volume of x_2-phase is a little.Mn alloying decreases the lattice parameters a and c of γ-phase and the c/a ratio becomes nearly to one,because the atomic radius of Mn is less than the atomic radius of Ti or Al.Mn alloying promotes the formation of twins in γ-phase and increases the ability of plastic deformation of TiAl alloys at room tem- perature.

Key words: TiAl alloy, microstructure, property, twin

CAO Mingzhou;HAN Dong;ZHOU Jing;LI Dong Institute of Metal Research,Academia Sinica,Shenyang,China Associate Professor,Institute of Metal Research,Academia Sinica,Shenyang 110015,China. MICROSTRUCTURE AND PROPERTIES OF Mn-CONTAINING TiAI ALLOYS[J]. Acta Metallurgica Sinica (English Letters), 1990, 3(6): 442-445.

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MICROSTRUCTURE AND PROPERTIES OF Mn-CONTAINING TiAI ALLOYS

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