Metallographic screening of grain boundary engineered type 304 austenitic stainless steel

An electrochemical etching method for the identification of grain boundary engineered type 304 austenitic stainless steel microstructures is described. The method can be applied for rapid microstructure screening to complement electron backscatter diffraction analysis. A threshold parameter to ident...

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Bibliographic Details
Published in:Materials characterization 2014-08, Vol.94, p.111-115
Main Authors: Hanning, F., Engelberg, D.L.
Format: Article
Language:English
Subjects:
Austenitic stainless steel
Austenitic stainless steels
BACKSCATTERING
COMPARATIVE EVALUATIONS
Complement
Cross-disciplinary physics: materials science
rheology
Electrochemical polarisation
ELECTROCHEMISTRY
Electron back scatter diffraction
ELECTRON DIFFRACTION
ETCHING
Exact sciences and technology
GRAIN BOUNDARIES
Grain boundary engineering
MATERIALS SCIENCE
METALLOGRAPHY
Microstructure
Nitric acid
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
POLARIZATION
Screening
Solidification
STAINLESS STEEL-304
Thresholds
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Summary:An electrochemical etching method for the identification of grain boundary engineered type 304 austenitic stainless steel microstructures is described. The method can be applied for rapid microstructure screening to complement electron backscatter diffraction analysis. A threshold parameter to identify grain boundary engineered microstructure is proposed, and the application of metallographic etching for characterising the degree of grain boundary engineering discussed. •As-received (annealed) and grain boundary engineered microstructures were compared.•Electro-chemical polarisation in nitric acid solutions was carried out.•A metallographic screening method has been developed.•The screening method complements EBSD analysis for microstructure identification.
ISSN:1044-5803
1873-4189
DOI:10.1016/j.matchar.2014.05.016