Indentation characteristics of superelastic nickel-titanium wires and a preliminary study of copper-bonded joints between them

A. J. Muir Wood; V. Gergely; T. W. Clyne

doi:10.1117/12.538613

21 July 2004 Indentation characteristics of superelastic nickel-titanium wires and a preliminary study of copper-bonded joints between them

A. J. Muir Wood, V. Gergely, T. W. Clyne

Author Affiliations +

Proceedings Volume 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics; (2004) https://doi.org/10.1117/12.538613
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

Wires of nickel-titanium have been tensile tested to evaluate their elastic constants, super-elastic characteristics and strength. These data are compared with the response of the same material to (hot stage) indentation testing, using both nano-indentation and micro-indentation equipment, and both a Berkovich and a spherical indenter. Indentation characteristics indicative of super-elastic behaviour are identified. In particular, the observation of enhanced indentation strain recovery when tested above the Af temperature, compared with tests performed at lower temperature, is recorded here and appears to represent a reliable indicator of super-elastic behaviour. Wires have also been joined together by liquid phase sintering, after a copper electroplating treatment, and by solid state diffusion bonding. Microstructural studies of these joints revealed the expected phases. Preliminary mechanical studies have given an indication that it may be possible to produce strong, highly porous super-elastic material in this way.

Citation Download Citation

A. J. Muir Wood, V. Gergely, and T. W. Clyne "Indentation characteristics of superelastic nickel-titanium wires and a preliminary study of copper-bonded joints between them", Proc. SPIE 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics, (21 July 2004); https://doi.org/10.1117/12.538613

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available