Title: Stress-induced transformation behavior of a polycrystalline NiTi shape memory alloy
Subtitle: Micro and macromechanical investigations via in situ optical microscopy
Authors: Brinson, Lynda Catherine
Schmidt, Ina 
Lammering, Rolf  
Language: en
Subject (DDC): Ingenieurwissenschaften
Subject: Phase Transformation
Issue Date: 2004
Document Type: Article
Journal / Series / Working Paper (HSU): Journal of the Mechanics and Physics of Solids 
Volume: 52
Issue: 7
Page Start: 1549
Page End: 1571
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.
Organization Units (connected with the publication): Mechanik 
ISSN: 00225096
DOI: 10.1016/j.jmps.2004.01.001
Rights: 4.0 deutsch
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