(中国科学院金属研究所 沈阳材料科学国家(联合)实验室，沈阳 110016)
摘 要: 利用纳米压痕仪研究Ti-24Nb-4Zr-8Sn (Ti2448)合金不同取向单晶体的硬度和弹性模量。结果表明：Ti2448合金单晶表现出各向异性，不同晶面的压入模量和纳米压痕硬度值不同，(001)、(011)和(111)晶面的压入模量分别为68.1、69.1和78.9 GPa，纳米压痕硬度分别为3.5、3.5和3.0 GPa；不同晶面压入模量和纳米压痕硬度的相对大小规律与常规方法测量结果一致，但无法相互换算。
关键字: Ti2448合金；单晶；纳米压痕；硬度；弹性模量
（Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences,
Shenyang 110016, China）
Abstract:Nanoindentation techniques were used to determine the hardness and elastic modulus of Ti-24Nb-4Zr-8Sn (abbreviated as Ti-2448) single crystals with different orientation surfaces. Both hardness and elastic modulus anisotropy were observed. The indentation modulus is 68.1, 69.1 and 78.9 GPa on (001), (011) and (111) surfaces, respectively, and the indentation hardness is 3.0, 3.5 and 3.5 GPa, respectively. The variation of the hardness and elastic modulus tested by nanoidentation is consistent with that obtain by the conventional testing method, but the results could not transfer to that of conventional testing method.
Key words: Ti2448 alloy; single crystals; nanoindentation; hardness; elastic modulus
