Cu-Ni-Ti合金的成分-弹性性能关系的高通量表征

A High-Throughput Experimental Characterization of Composition-Elasticity Relationship of Cu-Ni-Ti Alloy

铍铜合金性能优异,但潜存毒性危害, Cu-Ni-Ti合金是替代铍铜的潜在候选材料。采用多元扩散偶实验方法对Cu-Ni-Ti合金展开研究,进行Cu-Ni-Ti合金的成分-弹性性能关系的高通量表征。结果表明,根据成分变化情况可将扩散偶Cu-Ni-Ti界面扩散层分为具有独特相组成的若干区域。在650℃热处理400 h后的Cu-Ni-Ti界面扩散层的纳米压痕点区域包括了纯Cu, fcc(Cu), CuTi, fcc(Ti),纯Ti和Cu-Ni无限互溶固溶体等几个相区,在700℃热处理400 h后的Cu-Ni-Ti界面扩散层的压痕点区域依次包括了纯Ti, hcp(Ti),化合物两相区、 Cu-Ni固溶体和纯Ni等几个相区。对应不同相区域和成分,其弹性模量和硬度呈现一定的规律性变化。由本文所述的高通量研究方法和实验结果,可对Cu-Ni-Ti铜合金体系的成分-弹性性能关系进行定性或定量分析。

Beryllium copper elastic alloys show excellent properties but have the danger of poisonousness.The Cu-Ni-Ti alloy is a potential alternative as the substitution of beryllium copper alloy.At present,a high-throughput diffusion-multiple experiment was done to investigate the composition-elasticity relationship of the Cu-Ni-Ti alloy.The results showed that the diffusion layer could be divided into several parts with different phases by the composition distribution.The nanoindentation region of the diffusion layer after the diffusion-multiple sample heating for 400 h at 650℃ consisted of pure Cu,fcc(Cu),CuTi,fcc(Ti),pure Ti and Cu-Ni binary solution.The nanoindentation region after the sample heating for 400 h at 700℃ consisted of pure Ti,hcp(Ti),two-compound region,Cu-Ni binary solution and pure Ni.The elastic modulus and hardness showed regular changes in different phase regions.On the basis of the high-throughput approach and the results obtained,the relationship between the composition and elasticity of Cu-Ni-Ti copper alloy could be analyzed qualitatively or quantitatively.