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

被引：2

作者：

Wood, AJM ^{[1
]}

Gergely, V ^{[1
]}

Clyne, TW ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, Gordon Lab, Cambridge CB2 3QZ, England

来源：

SMART STRUCTURES AND MATERIALS 2004: ACTIVE MATERIALS: BEHAVIOR AND MECHANICS | 2004年 / 5387卷

关键词：

shape memory alloy; nickel-titanium; Ni-Ti; superelastic; joints; indentation;

D O I：

10.1117/12.538613

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 stain recovery when tested above the A(f) 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.

引用

页码：268 / 275

页数：8

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