Local characterization of austenite and ferrite phases in duplex stainless steel using MFM and nanoindentation

Karim Raafat Gadelrab, Guang Li, Matteo Chiesa, Tewfik Souier

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The local mechanical properties of ferritic and austenitic domains in a duplex stainless steel are locally studied by nanoindentation. The elastic and plastic properties of the two phases are determined. Without any specific surface treatment (chemical or electrochemical), the austenitic and ferritic domains present in the duplex stainless steel are distinguished using magnetic force microscopy. The magnetic scans allow nanoindentation results to be assigned to the respective phase, yielding the local mechanical properties of the duplex steel. The magnetic scans also show a sharp transition between the phases that is maintained even inside indentations. The ferrite phase is found to supersede austenite in the elastic modulus, hardness, and strain-hardening exponent, while both phases possess similar yield strength. Interface properties are a weighted average of the phase properties.

Original languageEnglish
Pages (from-to)1573-1579
Number of pages7
JournalJournal of Materials Research
Volume27
Issue number12
DOIs
Publication statusPublished - Jun 28 2012

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magnetic force microscopy
Stainless Steel
Nanoindentation
nanoindentation
austenite
Austenite
Ferrite
stainless steels
ferrites
Stainless steel
mechanical properties
Magnetic force microscopy
Mechanical properties
strain hardening
Steel
yield strength
surface treatment
indentation
Indentation
Strain hardening

ASJC Scopus subject areas

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

Cite this

Local characterization of austenite and ferrite phases in duplex stainless steel using MFM and nanoindentation. / Gadelrab, Karim Raafat; Li, Guang; Chiesa, Matteo; Souier, Tewfik.

In: Journal of Materials Research, Vol. 27, No. 12, 28.06.2012, p. 1573-1579.

Research output: Contribution to journalArticle

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