Computer simulation of the shape memory effects in Fe-Mn type alloys accounting for the features of the FCC - HCP phase transformation

Research outputpeer-review

5 Citations (Scopus)

Abstract

An approach is presented to describe the mechanical behaviour of shape memory alloys undergoing a fcc - hcp phase transformation. Previously encouraging results have been obtained within the frames of the structure-analytical theory [1]. They were achieved by introducing specific limitations on the maximum allowable size of martensite and austenite crystals. The model described in this report differs by the averaging procedure which is organised in a way to account for the symmetry of fcc and hcp lattices as well as the symmetry of the transformation strain tensor. The results of modelling have shown that symmetrical considerations can explain the transformation plasticity (strain accumulation due to a transformation in a stressed specimen) while direct or reverse transformations, the incompleteness of the strain recovery in the subsequent reverse or direct transformation and the asymmetry of the mechanical behaviour for these two transformations. A qualitative agreement whith experiments on Fe-Mn alloys (except for the scale of the asymmetry between direct and reverse transformations) has been acheived, the errors of modelling being probably connected with the dislocation plasticity not accounted for in the model.

Original languageEnglish
Pages (from-to)178-183
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3345
DOIs
Publication statusPublished - 1 Dec 1997
EventInternational Workshop on New Approaches to High-Tech Materials: Nondestructive Testing and Computer Simulations in Materials Science and Engineering - St. Petersburg
Duration: 9 Jun 199713 Jun 1997

Fingerprint

Memory Effect
Phase Transformation
Shape Memory
Shape memory effect
phase transformations
Computer Simulation
computerized simulation
Phase transitions
Plasticity
Computer simulation
Reverse
Martensite
Austenite
Mechanical Behavior
Tensors
plastic properties
Asymmetry
Recovery
asymmetry
Crystals

Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

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abstract = "An approach is presented to describe the mechanical behaviour of shape memory alloys undergoing a fcc - hcp phase transformation. Previously encouraging results have been obtained within the frames of the structure-analytical theory [1]. They were achieved by introducing specific limitations on the maximum allowable size of martensite and austenite crystals. The model described in this report differs by the averaging procedure which is organised in a way to account for the symmetry of fcc and hcp lattices as well as the symmetry of the transformation strain tensor. The results of modelling have shown that symmetrical considerations can explain the transformation plasticity (strain accumulation due to a transformation in a stressed specimen) while direct or reverse transformations, the incompleteness of the strain recovery in the subsequent reverse or direct transformation and the asymmetry of the mechanical behaviour for these two transformations. A qualitative agreement whith experiments on Fe-Mn alloys (except for the scale of the asymmetry between direct and reverse transformations) has been acheived, the errors of modelling being probably connected with the dislocation plasticity not accounted for in the model.",
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AU - Volkov, A. E.

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N2 - An approach is presented to describe the mechanical behaviour of shape memory alloys undergoing a fcc - hcp phase transformation. Previously encouraging results have been obtained within the frames of the structure-analytical theory [1]. They were achieved by introducing specific limitations on the maximum allowable size of martensite and austenite crystals. The model described in this report differs by the averaging procedure which is organised in a way to account for the symmetry of fcc and hcp lattices as well as the symmetry of the transformation strain tensor. The results of modelling have shown that symmetrical considerations can explain the transformation plasticity (strain accumulation due to a transformation in a stressed specimen) while direct or reverse transformations, the incompleteness of the strain recovery in the subsequent reverse or direct transformation and the asymmetry of the mechanical behaviour for these two transformations. A qualitative agreement whith experiments on Fe-Mn alloys (except for the scale of the asymmetry between direct and reverse transformations) has been acheived, the errors of modelling being probably connected with the dislocation plasticity not accounted for in the model.

AB - An approach is presented to describe the mechanical behaviour of shape memory alloys undergoing a fcc - hcp phase transformation. Previously encouraging results have been obtained within the frames of the structure-analytical theory [1]. They were achieved by introducing specific limitations on the maximum allowable size of martensite and austenite crystals. The model described in this report differs by the averaging procedure which is organised in a way to account for the symmetry of fcc and hcp lattices as well as the symmetry of the transformation strain tensor. The results of modelling have shown that symmetrical considerations can explain the transformation plasticity (strain accumulation due to a transformation in a stressed specimen) while direct or reverse transformations, the incompleteness of the strain recovery in the subsequent reverse or direct transformation and the asymmetry of the mechanical behaviour for these two transformations. A qualitative agreement whith experiments on Fe-Mn alloys (except for the scale of the asymmetry between direct and reverse transformations) has been acheived, the errors of modelling being probably connected with the dislocation plasticity not accounted for in the model.

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