Abstract
Controlled reversible changes in surface texture and topography are of interest to many applications, including information storage, optical communication devices, micro-fluidic instruments for drug delivery, and smart tribological surfaces for friction and wear control. Here, we demonstrate a method of inducing two-way reversible changes in an indentation made on the surface of a shape memory NiTi alloy. The two-way indent shape change is accomplished by thermomechanical training of spherical indents in NiTi shape memory alloy. After training, spherical indents exhibit two-way depth recovery: Shallow indent depth at high temperature and deep indent depth at low temperature. The reversible depth change is about 45% of the total indent depth and is stable over many cycles. The reversible depth change can have a wide range of engineering applications.
Original language | English |
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Article number | 131904 |
Journal | Applied Physics Letters |
Volume | 88 |
Issue number | 13 |
DOIs | |
State | Published - 2006 |
Bibliographical note
Funding Information:The authors would like to thank A. Weiner and W. Ni for their generous help during this study. The authors are also grateful to the National Science Foundation for partial support of this work under SGER CMS 0336810 and GOALI CMS 0510294.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)