Stress-induced transformation behavior of a polycrystalline NiTi shape memory alloy: Micro and macromechanical investigations via in situ optical microscopy
Publication date
2004
Document type
Research article
Author
Brinson, Lynda Catherine
Schmidt, Ina
Lammering, Rolf
Organisational unit
Scopus ID
ISSN
Series or journal
Journal of the Mechanics and Physics of Solids
Periodical volume
52
Periodical issue
7
First page
1549
Last page
1571
Part of the university bibliography
✅
Keyword
Phase Transformation
Microstructure
Abstract
An experimental investigation of the micro and macromechanical transformation behavior of polycrystalline NiTi shape memory alloys was undertaken. Special attention was paid to macroscopic banding, variant microstructure, effects of cyclic loading, strain rate and temperature effects. Use of an interference filter on the microscope enabled observation of grain boundaries and martensitic plate formation and growth without recourse to etching or other chemical surface preparation. Key results of the experiments on the NiTi include observation of localized plastic deformation after only a few cycles, excellent temperature and stress relaxation correlation, a refined definition of "full transformation" for polycrystalline materials, and strain rate dependent effects. Several of these findings have critical implications for understanding and modeling of shape memory alloy behavior. © 2004 Elsevier Ltd. All rights reserved.
Version
Not applicable (or unknown)
Access right on openHSU
Metadata only access