Influence of Heat Treatments on Microstructure and Magnetic Domains in Duplex Stainless Steel S31803

Influence of Heat Treatments on Microstructure and Magnetic Domains in Duplex Stainless Steel S31803

The influence of heat treatments on microstructure and magnetic domains in duplex stainless steel S31803 is studied using an innovative structural characterization protocol. Electron backscatter diffraction (EBSD) maps as well as magnetic force microscopy (MFM) images acquired on the same region of...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Vol. 49; no. 8; pp. 3515 - 3524
Main Authors: Dille, Jean, Pacheco, Clara Johanna, Camerini, Cesar Giron, Malet, Loic Charles, Nysten, Bernard, Pereira, Gabriela Ribeiro, De Almeida, Luiz Henrique, Alcoforado Rebello, João Marcos
Format: Journal Article
Language:English
Published: New York Springer US 01-08-2018
Springer Nature B.V
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Duplex stainless steels
Electron backscatter diffraction
Ferrite
Heat treating
Heat treatment
Image acquisition
Magnetic domains
Magnetic fields
Materials Science
Metallic Materials
Microstructure
Nanotechnology
Sigma phase
Stainless steel
Structural analysis
Structural Materials
Surfaces and Interfaces
Thin Films
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Summary:The influence of heat treatments on microstructure and magnetic domains in duplex stainless steel S31803 is studied using an innovative structural characterization protocol. Electron backscatter diffraction (EBSD) maps as well as magnetic force microscopy (MFM) images acquired on the same region of the sample, before and after heat treatment, are compared. The influence of heat treatments on the phase volumetric fractions is studied, and several structural modifications after heat treatment are highlighted. Three different mechanisms for the decomposition of ferrite into sigma phase and secondary austenite are observed during annealing at 800 °C. MFM analysis reveals that a variety of magnetic domain patterns can exist in one ferrite grain.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-018-4721-1