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EBSD and AFM observations of the microstructural changes induced by low temperature plasma carburising on AISI 316

Corujeira Gallo, Santiago and Dong, Hanshan 2011, EBSD and AFM observations of the microstructural changes induced by low temperature plasma carburising on AISI 316, Applied surface science, vol. 258, no. 1, pp. 608-613, doi: 10.1016/j.apsusc.2011.06.158.

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Title EBSD and AFM observations of the microstructural changes induced by low temperature plasma carburising on AISI 316
Author(s) Corujeira Gallo, SantiagoORCID iD for Corujeira Gallo, Santiago orcid.org/0000-0002-7305-2931
Dong, Hanshan
Journal name Applied surface science
Volume number 258
Issue number 1
Start page 608
End page 613
Total pages 6
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2011-10-15
ISSN 0169-4332
Keyword(s) Plasma carburising
Active screen
Expanded austenite
Microstructure
Summary Low temperature plasma carburising (LTPC) has been increasingly accepted as a hardening process for austenitic stainless steels because it produces a good combination of tribological and corrosion properties. The hardening mechanism is based on the supersaturation of the austenitic structure with carbon, which greatly hardens the material, significantly expands the fcc unit cell, produces high levels of compressive residual stresses and, ultimately, leads to the occurrence of deformation bands and rotation of the crystal lattice. The microstructural changes introduced during plasma carburising have a significant impact on the mechanical, tribological and corrosion performance and, for this reason, the microstructure of expanded austenite or S-phase has been extensively studied. However, modern surface characterisation techniques could provide new insights into the formation mechanism of S-phase layers. In this work, backscattered electron diffraction and atomic force microscopy were used to characterise the surface layers of expanded austenite produced by LTPC in an active screen furnace. Based on the experimental results, the plastic deformation, its dependence on crystallographic orientation, the evolution of grain boundaries, and their effects on mechanical, tribological and corrosion properties are discussed. © 2011 Elsevier B.V. All rights reserved.
Language eng
DOI 10.1016/j.apsusc.2011.06.158
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 869999 Manufacturing not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2011, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30088203

Document type: Journal Article
Collection: Institute for Frontier Materials
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