(上海交通大学 金属基复合材料国家重点实验室，上海 200240)
摘 要: 研究α+β、β和β三段热处理方法对原位自生TiB和La2O3增强钛基复合材料组织和拉伸性能的影响。用金相显微镜、扫描电子显微镜进行组织和增强体观察，热处理后对材料进行室温和高温拉伸实验。结果表明，热处理前、后增强体稳定。α+β热处理得到双态组织，β和β三段热处理得到片层组织。α+β热处理后试样的室温和高温拉伸性能较好，β三段热处理后的室温和高温拉伸性能均优于β热处理的。
关键字: 钛基复合材料；热处理；组织；拉伸性能
in situ synthesized (TiB+La2O3)/Ti composite
（State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China）
Abstract:The effects of α+β, β and β triplex heat treatment on microstructure and mechanical properties of in situ synthesized (TiB+La2O3)/Ti composite were studied. The microstructures and reinforcements were examined by means of optical microscopy and scanning electron microscopy. Room and high temperature tensile properties of the specimens were tested. The results show that TiB and La2O3 are stable after heat treatment. Duplex structures are obtained after α+β heat treatment. Laminar α structures are gained after β and β triplex heat treatment. Room and high temperature tensile properties of the specimens after α+β and β triplex heat treatment are better than those after β heat treatment.
Key words: titanium matrix composite; heat treatment; microstructure; tensile property
