Evolution of Internal Stresses During Cyclic Superelastic Deformation of NiTi Investigated by X-ray Synchrotron Diffraction
Year: 2015
Type: article
Abstract: Cyclic tensile superelastic deformation of NiTi was investigated using high resolution in-situ synchrotron x-ray diffraction method. Diffraction patterns were recorded under applied stress prior and after the stress induced martensitic transformation, analyzed and interpreted in view of the evolution of microstructure in the transforming polycrystal. A simple bicrystal scheme of the polycrystal transformation is used to rationalize the experimental evidence on microstructure evolution during cycling. It is claimed that the instability of cyclic superelastic response of NiTi is due to the gradual rise of internal stresses originating from the accumulation of plastic deformation accompanying the martensitic transformation in constrained polycrystalline environment.
Source: Materials Today Proceedings
Authors: P. Sedmak, P. Sittner, J. Pilch, C. Curfs
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $200
Awards: G2462374288, Experimentally justified multiscale modelling of shape memory alloys, Optimization of microstructure and properties of SMA filaments through control of recovery processes during heat treatment by ultra short DC pulse, Fatigue of NiTiX High Temperature Shape Memory Alloy Actuators /FACT/
OpenAlex ID: W2201492067