(湘潭大學 材料與光電物理學院, 湘潭 411105)
摘 要: 采用銅模吸鑄法在TiNiCuSn合金系中添加難熔金屬Nb, 制備出了d 3 mm Ti60Cu14Ni12Sn4Nb10棒狀多相復合材料。對該合金的顯微組織特征和相組成進行了分析, 并對其室溫壓縮性能進行了測試。 研究結果表明, Ti60Cu14Ni12Sn4Nb10的顯微組織主要由β-Ti枝晶相、 納米晶化相和少量非晶相組成。 該合金在室溫下表現(xiàn)出較好的綜合力學性能, 其抗壓斷裂強度可達1.71 GPa, 斷裂應變約為17.7%, 彈性模量為116 GPa。 合金的斷口分析結果表明, 由于產(chǎn)生了塑性枝晶相, 因此該合金具有較高塑性。
關鍵字: 鈦合金； Ti60Cu14Ni12Sn4Nb10復合材料；顯微組織； 力學性能
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
