Characteristic evolution of residual stress in shape memory Fe-Mn-Si-Cr alloys

S. Suzuki, E. P. Kwon, S. I. Tanaka

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

Abstract

Since the matrix phase is transformed to martensitic phase in shape memory alloys (SMAs) during plastic deformation, complicated residual stresses may arise during deformation, and they may affect the shape recovery ability of the alloys. Thus, it is important to be able to characterize the residual stresses formed in SMAs during plastic deformation and annealing. In this study, X-ray diffraction was used to characterize the residual stress formed in a Fe-Mn-Si-Cr SMA, which was deformed in the tensile direction and subsequently annealed. The results showed that the compressive stress persisted in the tensile direction of the face-centered cubic (fcc) matrix upon tensile deformation and unloading. Compressive stress is believed to result from the hexagonal close-packed (hcp) phase formed during stress-induced martensitic transformation. After the deformed samples were annealed to recover their shapes, the residual stress was considerably reduced. This is believed to be due to the decrease in the formation of the hcp phase or to the recovery of their shapes during annealing. Our results indicated that residual stress in the fcc matrix phase is associated with the shape recovery characteristics of the alloys after martensitic and reverse martensitic transformations.

Original languageEnglish
Title of host publicationInternational Conference on Residual Stresses 9 (ICRS 9)
PublisherTrans Tech Publications Ltd
Pages374-379
Number of pages6
ISBN (Print)9783037858493
DOIs
Publication statusPublished - 2014 Jan 1
Event9th International Conference on Residual Stresses, ICRS 2012 - Garmisch-Partenkirchen, Germany
Duration: 2012 Oct 72012 Oct 9

Publication series

NameMaterials Science Forum
Volume768-769
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other9th International Conference on Residual Stresses, ICRS 2012
CountryGermany
CityGarmisch-Partenkirchen
Period12/10/712/10/9

Keywords

  • Fe-Mn-Si-Cr alloy
  • Martensitic transformation
  • Shape memory effect

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Suzuki, S., Kwon, E. P., & Tanaka, S. I. (2014). Characteristic evolution of residual stress in shape memory Fe-Mn-Si-Cr alloys. In International Conference on Residual Stresses 9 (ICRS 9) (pp. 374-379). (Materials Science Forum; Vol. 768-769). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.768-769.374