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采用大功率电子束物理气相沉积(EB-PVD)技术制备了层厚比为 1:1 的 Ti/Ti-Al 微叠层复合材料薄板,用 XRD 和 SEM对材料的微观结构进行了表征,对其室温及高温拉伸性能进行了测试。结果表明:材料由 Ti,α2-Ti3Al 和γ-TiAl 相组成,层状结构对提高材料的室温塑性有利;尽管未经致密化处理的材料存在着较多微孔,但在金属间化合物层的反常强化及层间界面对裂纹的钝化作用下,材料仍具有较高的抗高温拉伸强度和良好的高温延迟断裂特性。
Ti / Ti-Al microlaminate composite sheets with a layer thickness ratio of 1: 1 were prepared by high-power electron beam physical vapor deposition (EB-PVD) technology. The microstructures of the composites were characterized by XRD and SEM. Its room temperature and high temperature tensile properties were tested. The results show that the material is composed of Ti, α2-Ti3Al and γ-TiAl phases. The layered structure is advantageous to improve the room-temperature plasticity of the material. Although there are many micropores in the non-densified material, the intermetallic compound layer Anomaly strengthening and interfacial interface cracking passivation, the material still has high tensile strength and good high temperature delayed fracture properties.