期刊
SURFACE & COATINGS TECHNOLOGY
卷 202, 期 13, 页码 3115-3120出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2007.11.011
关键词
nickel-titanium; nickel-titanium-copper; nickel-titanium-hafnium; thin film; shape memory; indentation
资金
- Engineering and Physical Sciences Research Council [GR/R95364/01] Funding Source: researchfish
Thin sputtered films of binary (Ni-Ti) and ternary (Ni-Ti-Hf and Ni-Ti-Cu) shape memory alloys have been subjected to nanoindentation over a range of temperature (up to 400 degrees C), using a small diameter spherical indenter. The load-displacement plots obtained during these experiments have been interpreted so as to reveal whether the imposed strain was being at least partly accommodated by the martensitic phase transformation, ie whether superelastic deformation was taking place. This was done by evaluating the remnant indent depth ratio (depth after unloading/depth at peak load), which is expected to have a relatively small value if superelastic deformation and recovery are significant. It is confirmed that this procedure, which has previously been validated for bulk material, can be applied to these thin films (similar to 2 mu m in thickness). The results indicate that ternary alloys with up to about 20 at.%Hf or 10 at.%Cu can exhibit superelastic behaviour over suitable temperature ranges. (C) 2007 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据