Exceptionally high strength and good ductility in an ultrafine-grained 316L steel processed by severe plastic deformation and subsequent annealing

Moustafa El-Tahawy, Pedro Henrique R. Pereira, Yi Huang, Hyeji Park, Heeman Choe, Terence G. Langdon, Jenő Gubicza

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

An investigation was conducted to evaluate the effect of annealing at different temperatures on the tensile properties of ultrafine-grained 316L stainless steel processed by high-pressure torsion (HPT). A “moderate-temperature” annealing at 740 K resulted in reduced strength and elongation due to the annihilation of mobile dislocations. A “high-temperature” annealing at 1000 K yielded a remarkably good combination of yield strength (∼1330 MPa) and elongation to failure (∼43%) which can be attributed to the almost full reversion of α′-martensite formed during HPT into γ-austenite while the grain size remained very fine with a value of about 200 nm.

Original languageEnglish
Pages (from-to)240-242
Number of pages3
JournalMaterials Letters
Volume214
DOIs
Publication statusPublished - Mar 1 2018

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Keywords

  • Annealing
  • Deformation and fracture
  • Metals and alloys
  • Microstructure
  • Nanocrystalline materials

ASJC Scopus subject areas

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

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