ON THE ORDERING TRANSFORMATIONS IN Ti_3 Al-Nb ALLOY

Acta Metall Sin

1990, Vol. 26

Issue (6): 57-62 DOI:

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ON THE ORDERING TRANSFORMATIONS IN Ti_3 Al-Nb ALLOY

LI Dong;ZHOU Jing;CHANG Xin;GUAN Shaoxuan Institute of Metal Research; Academia Sinica; Shenyang

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LI Dong;ZHOU Jing;CHANG Xin;GUAN Shaoxuan Institute of Metal Research; Academia Sinica; Shenyang. ON THE ORDERING TRANSFORMATIONS IN Ti_3 Al-Nb ALLOY. Acta Metall Sin, 1990, 26(6): 57-62.

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Abstract Study was made of the behaviour of ordering transformation in Ti_3Al-Nb alloy, including the ordering at high temperature, the transformation of hightemperature β phase during cooling, and the decomposition of metastable β phaseduring aging. Results show that the ordered primary a_2 and high temperature β inalloy occurred at 1060℃. The transformation of high temperature β phase proceedby β→a_2+ω type during cooling, and the decomposition of metastable β and ωtype proceeded by (β+ω type)_(metastable)→(a_2+β)_(stable) during aging at 700℃.

Key words: Ti_3Al-Nb alloy ordering transformation α_2 β ω

Received: 18 June 1990

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