Effect of Thermomechanical Processing on Texture and Superelasticity in Fe–Ni-Co-Al–Ti-B Alloy

Doyup Lee, Toshihiro Omori, Kwangsik Han, Yasuyuki Hayakawa, Ryosuke Kainuma

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The texture and superelasticity were investigated in austenitic Fe–Ni-Co-Al–Ti-B alloy with various reduction ratios of cold rolling and heating ratios in annealing. The rolled sheets show the {110} 〈112〉 deformation texture at a reduction ratio higher than 80%, while the texture hardly changes in the primary recrystallization at 1000 °C. The β (B2) precipitates inhibit the grain growth at this temperature, but they dissolve during heating, and secondary recrystallization occurs due to decreased pinning force at temperatures higher than 1100 °C, resulting in texture change to {210} 〈001〉. The recrystallization texture is more strongly developed when the reduction ratio and heating rate are high and slow, respectively. The 90% cold-rolled and slowly heated sheet shows the recrystallization texture and high fraction of low-angle boundaries. As a result, ductility and superelasticity can be drastically improved in the 90% cold-rolled sheet, although superelasticity was previously obtained only in thin sheets with 98.5% reduction.

Original languageEnglish
Pages (from-to)102-111
Number of pages10
JournalShape Memory and Superelasticity
Volume4
Issue number1
DOIs
Publication statusPublished - 2018 Mar 1

Keywords

  • Deformation texture
  • Ferrous shape memory alloy
  • Fe–Ni-Co-Al–Ti-B
  • Recrystallization texture
  • Secondary recrystallization
  • Superelasticity

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Effect of Thermomechanical Processing on Texture and Superelasticity in Fe–Ni-Co-Al–Ti-B Alloy'. Together they form a unique fingerprint.

  • Cite this