|Investigation of microstructure in hot-pressed Nb-23Ti-15Al alloy|
|Z. W.; Wei Shi, H.; Zhang, H. Y.; Wu, D. L.; Jin, T.; Sun, X. F.; Zheng, Q.
|Source Publication||Journal of Alloys and Compounds
|Abstract||Microstructure of hot-pressed Nb-23Ti-15Al alloy has been systematically investigated, with emphasis on the characterization of Ti(O, C) phase. The microstructure and composition of Nb-23Ti-15Al alloy were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron probe microanalysis (EPMA). The results indicate the presence of beta, delta and Ti(O, C) phases in the alloy. The b phase exhibits as large irregular blocks, while the d phase presents as small equiaxed particles linked together around b blocks. Ordering of b phase is shown by related selected area electronic diffraction (SAED) patterns and dark-field micrograph. The Ti(O, C), a solid-solution of TiO or TiC, is characterized for the first time in Nb-Ti-Al alloy. The Ti(O, C) has a face-centered cubic (FCC) structure and a moderate lattice parameter between that of TiO and TiC. Two different morphologies of Ti(O, C) are observed in the alloy: large cobblestone-like aggregated particles and small dispersive particles. The formation of Ti(O, C) phase can potentially increase high-temperature strength of Nb-Ti-Al alloy. (C) 2015 Elsevier B.V. All rights reserved.|
; wei, hua
; zhang, hongyu
; wu, duoli
; jin, tao
; sun, xiaofeng
; zheng, qi] chinese acad sci, inst met res, superalloys div, shenyang 110016, peoples r china.
; zheng, q (reprint author), chinese acad sci, inst met res, superalloys div, 72 wenhua rd, shenyang 110016, peoples r china.
Ti(o, c) Phase
Z. W.,Wei Shi, H.,Zhang, H. Y.,et al. Investigation of microstructure in hot-pressed Nb-23Ti-15Al alloy[J]. Journal of Alloys and Compounds,2015,636:61-66.
Z. W..,Wei Shi, H..,Zhang, H. Y..,Wu, D. L..,Jin, T..,...&Zheng, Q..(2015).Investigation of microstructure in hot-pressed Nb-23Ti-15Al alloy.Journal of Alloys and Compounds,636,61-66.
Z. W.,et al."Investigation of microstructure in hot-pressed Nb-23Ti-15Al alloy".Journal of Alloys and Compounds 636(2015):61-66.
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