Effect of high speed high pressure torsion parameters on grain refinement of coned shape Fe based SMA active elements

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

Research output: Contribution to journalArticle

1 Citation (Scopus)


High Speed High Pressure Torsion (HS-HPT) refers to processing that involves a combination of high pressure with torsional straining. This technique allows the efficient grain refinement on shape memory alloy brittle (CuAlNi) or with very low plasticity (FeMnSiCr). HS-HPT involve slippage between anvils and sample this means the SPD occurs at specific temperature. The recrystallization during HS-HPT on shape memory alloys determines their functionality without supplemental heat treatments. The samples manufactured by HS-HPT are discs, rings or coned shaped, 20-40 mm in diameter and 1mm - 0.2 mm thickness. Varying HS-HPT parameters coned shaped elements with increasing deformation degree were produced from Fe28Mn6Si7Cr [ mass %] shape memory alloy. Scanning electron microscopy (SEM) observations, highlighted ultrafine structure. Experiments show that the mechanical properties of the alloy can be enhanced by HS-HPT. (C) 2015 The Authors. Published by Elsevier Ltd.

Original languageEnglish
Pages (from-to)897-900
Number of pages4
JournalMaterials today-Proceedings
Publication statusPublished - 2015
Event14th International Conference on Martensitic Transformations (ICOMAT) - Bilbao, Spain
Duration: 6 Jul 201411 Jul 2014


  • Severe Plastic Deformation
  • High Pressure Torsion
  • Shape Memory Alloy
  • Martensitic transformation
  • FeMnSiCr
  • Grain refining

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