Experimental equilibria of several β/βo–Ti–Al–Nb alloys containing ωo phase. (27th November 2019)

• Record Type: Journal Article
• Authors: Yang, L F; Xu, Y; Xu, R F; Yu, M J; Zhang, D M; Yuan, N Q; Lin, J P
• Is Part Of: Materials research express. Volume 6:Number 12(2019)
• Publication Date: 2019-11-27
• Subjects: high Nb containing Ti–Al -- phase equilibrium -- beta phase -- morphology -- isopleths section; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ab58e6
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: The phase equilibria of several (6, 8, 10) at% Nb–TiAl alloys are experimentally determined by the morphologic, crystallographic and thermal analysis methods. The thermodynamically determined phase equilibria reveal that ω o phase transforms from α 2 phase, having no β / β o phase retained at ambient temperature. While, the β / β o phase are experimentally observed in the samples annealed at 1400 °C followed by a slow cooling rate (∼10 °C min −1 ). Furthermore, the transformation of β o ↔ ω o, as well as the disorder-order transition of β ↔ β o, is unambiguously detected, within the certain transformation temperatures.