INFLUENCE OF ALLOYING ELEMENTS(Nb,Mo,V) ON MICROSTRUCTURE OF Ti_3Al BASE ALLOYS

Abstract

Abstract: The microstructures of Ti-14Al-21Nb and Ti-14Al-20Nb-2Mo-3.2V(wt%) alloys have been investikated by transmission electron microscopy(TEM).The phase constitution and the orientation relationship between α2and βwere identified by means of the selected area diffraction and the micro-diffraction techniques.Results show that,compared to Ti-14Al-21Nb,the alloying elements Mo and V can greatly increase the fraction of β phase and improve significantly the microstructures of Ti-14Al-20Nb-2Mo-3.2V.The ordered B2 structure is also evident in the residual βgrains of the latter alloy.

Key words: microstructure, alloying element, Ti_3Al base alloy, TEM

SONG Dan;DING Jinjun;WANG Yandong(Analysis and Testing Center,Northeastern University,Shenyang 110006,China). INFLUENCE OF ALLOYING ELEMENTS(Nb,Mo,V) ON MICROSTRUCTURE OF Ti_3Al BASE ALLOYS[J]. Acta Metallurgica Sinica (English Letters), 1996, 9(2): 85-88.

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INFLUENCE OF ALLOYING ELEMENTS(Nb,Mo,V) ON MICROSTRUCTURE OF Ti_3Al BASE ALLOYS

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