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针对金属基复合材料中增强相与基体合金界面问题,利用金属与金属间的界面结合特性,以Ti-6Al-4V纤维为增强相,通过挤压铸造制备了Tif/5A06Al复合材料并进行了退火处理。采用SEM和TEM等手段分析了Tif/5A06Al复合材料的基体组织、Ti-Al界面结构与界面反应。结果表明,采用挤压铸造工艺可以获得组织致密、界面结合良好的Tif/5A06Al复合材料。Tif/5A06Al复合材料基体中存在位错,Ti-6Al-4V纤维与铝基体界面形成了TiAl层和呈不连续分布的TiAl3界面反应产物。Tif/5A06Al复合材料力学性能测试表明,其纵向抗拉强度为1 045 MPa,纵向伸长率为5.2%。
Aiming at the interface between reinforced phase and matrix alloy in metal matrix composites, the Tif / 5A06Al composite was prepared by extrusion casting and the Ti-6Al-4V fibers were used as the reinforcing phase by the interfacial bonding between metal and metal. deal with. The microstructure, interface structure and interfacial reaction of Tif / 5A06Al composites were analyzed by means of SEM and TEM. The results show that the Tif / 5A06Al composite with compact structure and good interfacial adhesion can be obtained by squeeze casting technology. Dislocations exist in the matrix of Tif / 5A06Al composites, TiAl layers and discontinuous TiAl3 interfacial reaction products are formed at the interface between Ti-6Al-4V fibers and aluminum matrix. Tif / 5A06Al composites mechanical properties tests showed that the longitudinal tensile strength of 1 045 MPa, longitudinal elongation of 5.2%.