(湘潭大学 材料与光电物理学院, 湘潭 411105)
摘 要: 采用铜模吸铸法在TiNiCuSn合金系中添加难熔金属Nb, 制备出了d 3 mm Ti60Cu14Ni12Sn4Nb10棒状多相复合材料。对该合金的显微组织特征和相组成进行了分析, 并对其室温压缩性能进行了测试。 研究结果表明, Ti60Cu14Ni12Sn4Nb10的显微组织主要由β-Ti枝晶相、 纳米晶化相和少量非晶相组成。 该合金在室温下表现出较好的综合力学性能, 其抗压断裂强度可达1.71 GPa, 断裂应变约为17.7%, 弹性模量为116 GPa。 合金的断口分析结果表明, 由于产生了塑性枝晶相, 因此该合金具有较高塑性。
关键字: 钛合金； Ti60Cu14Ni12Sn4Nb10复合材料；显微组织； 力学性能
multi-phase Ti based composite
（Faculty of Material and Photoelectronic Physics,
Xiangtan University, Xiangtan 411105, China）
Abstract: Ti60Cu14Ni12Sn4Nb10 alloy was prepared by copper mold casting technique, and the mult-phase Ti composite was obtained. The alloy was investigated in terms of microstructure, phase constitution and compression property. The results indicate that the microstructures of the alloy consist of β-Ti dendrites, nano-crystalline phases and a few of amorphous phases. The multi-phase composite exhibit good comprehensive mechanic properties with fracture strength of 1.71 GPa, elongation of 17.7% and elastic module of 116 GPa. The fractography reveals that the alloy has high ductility because the dendritic phases produce in the alloy.
Key words: Ti alloy; Ti60Cu14Ni12Sn4Nb10 composite material; microstructure; mechanical properties
