Shape memory at nanometer scales

Published

Conference Paper

Nickel-titanium (NiTi) shape memory alloys undergo relatively large recoverable inelastic deformations via a stress-induced martensitic phase transformation. The nanoindentation experimental results presented in this study are the first to show evidence of discrete forward and reverse stress-induced thermoelastic martensitic transformations in nanometer scaled volumes of material. Shape recovery due to indentation, followed by subsequent heating, is demonstrated for indents depths in the sub 10 nm range via atomic force microscopy. It is also shown that the local material structure can be utilized to modify transformation behavior at nanometer scales, yielding insight into the nature of stress-induced martensitic phase transformations at small scales and providing opportunity for the design of nanometer sized NiTi actuators. © 2006 Materials Research Society.

Duke Authors

Cited Authors

  • Frick, CP; Lang, TW; Spark, K; Gall, K

Published Date

  • May 8, 2006

Published In

Volume / Issue

  • 888 /

Start / End Page

  • 69 - 74

International Standard Serial Number (ISSN)

  • 0272-9172

International Standard Book Number 10 (ISBN-10)

  • 155899842X

International Standard Book Number 13 (ISBN-13)

  • 9781558998421

Citation Source

  • Scopus