A comparative study of austenitic structure in NiTi and Fe based shape memory alloys after severe plastic deformation

C. Gurau, G. Gurau, L. G. Bujoreanu, F. M. B. Fernandes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The effect of high speed high pressure torsion (HS-HPT) was studied in NiTi and FeMnSiCr SMAs, by comparison. Severe plastic deformation was performed in austenite state for both types of alloys. The alloys subjected to HS-HPT, reduced their grain size due to microstructure fragmentation by compression and torsion. The active elements were achieved being able to support variable ranges of processing parameters like force, pressure, rotation speed and time of torsion. The evolution of microstructural refinement in the samples subjected to different deformation by HS-HPT, were studied by optical and scanning electron microscopy observation and the thermal effect was reveled using differential scanning calorimetry (DSC). (C) 2015 The Authors. Published by Elsevier Ltd.

Original languageEnglish
Title of host publicationInternational Conference on Martensitic Transformations (ICOMAT 2014)
EditorsJose San Juan, Angel López-Echarri, María L. Nó, Gabriel A. López
Place of PublicationAmsterdam, Netherlands
PublisherELSEVIER SCIENCE BV
Pages905-908
Number of pages4
Volume2
DOIs
Publication statusPublished - 2015
Event14th International Conference on Martensitic Transformations (ICOMAT) - Bilbao, Spain
Duration: 6 Jul 201411 Jul 2014

Publication series

NameMaterials today-Proceedings
PublisherElsevier Science B.V.
NumberSuppl. 3
Volume2
ISSN (Print)2214-7853

Conference

Conference14th International Conference on Martensitic Transformations (ICOMAT)
CountrySpain
CityBilbao
Period6/07/1411/07/14

Keywords

  • Severe Plastic Deformation
  • High Pressure Torsion
  • Shape Memory Alloy
  • Transformation Temperature
  • Martensitic transformation
  • FeMnSiCr
  • NiTi
  • Grain refining
  • HIGH-PRESSURE TORSION
  • TRANSFORMATION

Cite this

Gurau, C., Gurau, G., Bujoreanu, L. G., & Fernandes, F. M. B. (2015). A comparative study of austenitic structure in NiTi and Fe based shape memory alloys after severe plastic deformation. In J. S. Juan, A. López-Echarri, M. L. Nó, & G. A. López (Eds.), International Conference on Martensitic Transformations (ICOMAT 2014) (Vol. 2, pp. 905-908). (Materials today-Proceedings; Vol. 2, No. Suppl. 3). ELSEVIER SCIENCE BV. https://doi.org/10.1016/j.matpr.2015.07.428