Ti-Al-Nb三元体系50Ti-xAl-yNb的垂直截面  

Vertical section of 50Ti-xAl-yNb in Ti-Al-Nb system

作　　者：赵云 刘立斌[1] 杨家俊 章立钢[1] ZHAO Yun;LIU Libin;YANG Jiajun;ZHANG Ligang(School of Material Science and Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《粉末冶金材料科学与工程》2020年第4期280-287,共8页Materials Science and Engineering of Powder Metallurgy

基　　金：科技部重点专项(2016YFB0701301)。

摘　　要：采用真空熔炼法制备Ti-Al-Nb三元合金样品,分别在1000,900和800℃的炉中退火720,1440和2160 h后,快速淬火以保留高温组织。使用X射线衍射分析(XRD),差热分析(DSC)和电子探针显微分析(EPMA)研究Ti-Al-Nb系统中50Ti-xAl-yNb的垂直截面。重点检测了中温区域(800~1000℃)的相区变化,实际测得5个三相平衡区:σ+β+α2,σ+O+α2,α2+γ+β,α2+γ+σ以及α2+σ+τ;2个两相平衡区:β+O和α2+γ;以及2个单相区:γ和β。The Ti-Al-Nb ternary alloy samples were prepared by vacuum melting,and then annealed at 1000,900,and 800℃for 720,1440,and 2160 h in furnace,respectively.Finally,these samples were quickly quenched to retain the high temperature structure.The vertical section of 50Ti-xAl-yNb in Ti-Al-Nb system was studied using X-ray diffraction analysis(XRD),differential thermal analysis(DSC)and electron probe microanalysis(EPMA).This work focused on detecting the change of phase zone in the middle temperature region(800−1000℃).Five three-phase equilibrium zones:σ+β+α2,σ+O+α2,α2+γ+β,α2+γ+σandα2+σ+τ;two two-phase equilibrium regions:β+O andα2+γ;and two single-phase regions:γandβhave been measured.

关 键 词：TI2ALNB Ti-Al-Nb体系 微观结构 相图测定 垂直截面 

分 类 号：TG146.23[一般工业技术—材料科学与工程]