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Study was made of the behaviour of ordering transformation in Ti_3AI-Nb alloy,including theordering at high temperatures,the transformation of high temperature β-phase duringcooling,and the decomposition of metastable β-phase during aging.The results show that theordered primary α_2 and high temperature β in alloy form at 1060℃.The transformation ofhigh temperature β-phase proceed by β→α_2+ω type during cooling,and the decomposition ofmetastable β and ω type proceeded by(β+ω)_(metustabte)→(α_2+β)_(stable)during aging at 700℃.
Study was made of the behavior of ordering transformation in Ti_3AI-Nb alloy, including theordering at high temperatures, the transformation of high temperature β-phase during cooling, and the decomposition of metastable β-phase during aging. Results showed that theordered primary α_2 and high temperature β in alloy form at 1060 ° C. The transformation of high temperature β-phase proceed by β → α_2 + ω type during cooling, and the decomposition of metatastable β and ω type proceeded by (β + ω) _ (metustabte) → (α_2 + β) _ (stable) during aging at 700 ℃.