CAJ | 학술논문

以有序 O 相为基的 Ti2 AlNb 基金属间化合物合金在航空领域具有广阔的应用前景。鉴于由 O，B2和α2三相构成的 Ti2 AlNb 基合金力学性能对相构成和组织敏感，采用金相显微镜、扫描电镜、透射电镜、X-射线衍射等分析手段，研究了不同固溶处理温度下 Ti2 AlNb 基合金组织演变的规律。研究结果表明，随着固溶温度升高，O 相向 B2相转变，原始状态中的α2相随固溶温度升高逐渐消失。固溶温度决定了材料中 O，B2和α2三相的含量及最终组织形貌，也决定了材料的性能。
이유서 O 상위기적 Ti2 AlNb 기금속간화합물합금재항공영역구유엄활적응용전경。감우유 O，B2화α2삼상구성적 Ti2 AlNb 기합금역학성능대상구성화조직민감，채용금상현미경、소묘전경、투사전경、X-사선연사등분석수단，연구료불동고용처리온도하 Ti2 AlNb 기합금조직연변적규률。연구결과표명，수착고용온도승고，O 상향 B2상전변，원시상태중적α2상수고용온도승고축점소실。고용온도결정료재료중 O，B2화α2삼상적함량급최종조직형모，야결정료재료적성능。
Intermetallic alloys based on an ordered orthorhombic Ti2 AlNb phase are considered as promising materials for aerospace ap-plications.The mechanical properties of the Ti2 AlNb-based intermetallic alloy with three phases of O,B2 and a2 ,are sensitive with the phases and microstructure.In the present work,phase transformation of Ti2 AlNb-based alloy during solution treatment at elevated tem-peratures was investigated by using optical microstructure (OM),scanning electron microscope (SEM),and transmission electron mi-croscope (TEM).The results indicated that the transformation from O to B2 phase occurred and the α2 phase gradually vanishes with increasing the solution treatment temperature.The solution treatment temperature determine the amounts of O,B2 and α2 phase and their final microstructural morphologies,and also determine the properties of the material.