Effect of ECAP processing temperature on an austenitic TWIP steel's microstructure, texture and mechanical properties

Marcos Natan da Silva Lima, Samuel Filgueiras Rodrigues*, Majid Al-Maharbi, Jessica Calvo Muñoz, José María Cabrera Marrero, Hamilton Ferreira Gomes de Abreu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The development of microstructure and texture of twinning-induced plasticity (TWIP) steel sheet during ECAP at two temperatures (250° and 350°) up to four passes were investigated. The high chromium content is the differential of this TWIP steel, a chemical element that reduces the stacking-fault energy and increases corrosion resistance. By imposing ECAP, the volume fraction of twins, dislocation density, and yield strength significantly increase while ductility decreases. This study compared the effect of temperature during applied severe plastic deformation (SPD). Thin parallel slip bands’ high density was observed, and in addition to an intense micro shear, banding took place when pressing was continued by increasing the number of passes. The martensitic transformation was not detected in the deformation-twinning microstructure after more passes. The relationship between the microstructure, strain-hardening behavior, and mechanical properties was investigated after two different deformation schedules of ECAP. The best balance between high strength and good ductility (1915 MPa and 7%) was obtained after four passes at 250 °C and 350 °C. It was found that the quantity of ECAP pass affects the displacement substructure with the formation of shear bands, subgrains, and various variants of twins. These also influenced strain-hardening behavior, microhardness, texture, and ultimate strength.

Original languageEnglish
Pages (from-to)1757-1775
Number of pages19
JournalJournal of Materials Research and Technology
Publication statusPublished - May 1 2023


  • Equal-Channel angular pressing
  • Grain size effect
  • Kernel average misorientation
  • Mechanical properties
  • TWIP steel
  • Texture

ASJC Scopus subject areas

  • Ceramics and Composites
  • Biomaterials
  • Surfaces, Coatings and Films
  • Metals and Alloys

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