Zhao Chao, Zhang Weiwen, Wang Zhi, Li Daoxi, Luo Zongqiang, Yang Chao, Zhang Datong
Guangdong Key Laboratory for Processing and Forming of Advanced Metallic Materials, South China University of Technology, Guangzhou 510640, China.
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China.
Materials (Basel). 2017 Sep 6;10(9):1038. doi: 10.3390/ma10091038.
The effect of Ti addition on the microstructure and mechanical properties of Cu-15Ni-8Sn alloys was investigated. Optical microscopy (OM), scanning electronic microscopy (SEM), and transmission electron microscopy (TEM) were used to determine grain size and distribution of the second phases in the alloys. The results indicate that the tensile properties of Cu-15Ni-8Sn alloys are improved significantly with Ti addition. Tensile elongation increased from 2.7% for the alloy without Ti to 17.9% for the alloy with 0.3% Ti, while tensile strength was maintained and even increased from 935 MPa to 1024 MPa. The improvement of the mechanical properties of Cu-15Ni-8Sn alloys by the addition of Ti is attributed to the grain refinement and suppression of discontinuous precipitation during heat treatment.
研究了添加钛对Cu-15Ni-8Sn合金微观结构和力学性能的影响。采用光学显微镜（OM）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）来确定合金中晶粒尺寸和第二相的分布。结果表明，添加钛后Cu-15Ni-8Sn合金的拉伸性能显著提高。拉伸伸长率从不含钛合金的2.7%增加到含0.3%钛合金的17.9%，同时抗拉强度保持不变甚至从935MPa提高到1024MPa。添加钛使Cu-15Ni-8Sn合金力学性能提高归因于晶粒细化以及对热处理过程中不连续析出的抑制。
