The nanomechanical properties of hardened 60NiTi were studied using nanoindentation. The hardened 60NiTi consists of two regions: the NiTi + Ni₄Ti₃ region, which is composed of a B2 NiTi matrix and nanoscale Ni₄Ti₃ precipitates, and the globular Ni₃Ti precipitates. Blind nanoindentation was first performed on 60NiTi using a diamond Berkovich without differentiating the regions. The two regions were then selectively indented using a diamond cube corner nanoindenter. The results show that the elastic modulus and hardness of the NiTi + Ni₄Ti₃ region were similar to those of bulk 60NiTi. The Ni₃Ti phase was found to have an elastic modulus that is more than double that of bulk 60NiTi and the NiTi + Ni₄Ti₃ region. The hardness was also found to be significantly higher. This study not only provides the first quantitative measurements of the mechanical properties of Ni₃Ti precipitates within 60NiTi but also suggests that the presence of large amounts of easily imaged Ni₃Ti could serve as a good indication of reduced amounts of Ni₄Ti₃, which could lead to lower overall hardness of the material.

使用纳米压痕研究了硬化的60NiTi的纳米力学性能。硬化的60NiTi由两个区域组成：由B2 NiTi基体和纳米级Ni ₄ Ti ₃沉淀物组成的NiTi + Ni ₄ Ti ₃区域，以及球状Ni ₃ Ti沉淀物。首先使用金刚石Berkovich在60NiTi上进行盲纳米压痕，而无需区分区域。然后使用菱形立方角纳米压头选择性地压入两个区域。结果表明，NiTi + Ni ₄ Ti ₃区的弹性模量和硬度与块状60NiTi相似。镍₃发现Ti相的弹性模量是整体60NiTi和NiTi + Ni ₄ Ti ₃区的弹性模量的两倍以上。还发现硬度明显更高。这项研究不仅提供了对60NiTi内Ni ₃ Ti析出物力学性能的首次定量测量，而且表明大量易成像的Ni ₃ Ti的存在可以很好地表明Ni ₄ Ti ₃含量的减少，这可能会导致材料的整体硬度降低。