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Surface Hardening of NiTi Shape Memory Alloy Induced by the NanoStructured Layer After Surface Mechanical Attrition Treatment

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Abstract:

To conduct grain refinement induced by plastic deformation, NiTi shape memory alloy is processed by surface mechanical attrition treatment. The process leads to surface nanocrystallization and consequently surface hardening. The cross sectional microhardness of the treated NiTi is measured and compared to those of annealed NiTi specimens with residual stress relaxation and recrystallization. Our results show that surface nanocrystallization induced by surface mechanical attrition treatment is an effective method to enhance the surface hardness and anti-wear properties of NiTi shape memory alloy for the biomedical application.

Keywords: NANOCRYSTALLINES; NANOINDENTATION; NITI SHAPE MEMORY ALLOY; SURFACE HARDENING; SURFACE MECHANICAL ATTRITION TREATMENT

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.4062

Publication date: December 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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