Inam, A, Drummond-Brydson, R and Edmonds, DV (2015) Effect of starting microstructure upon the nucleation sites and distribution of graphite particles during a graphitising anneal of an experimental medium-carbon machining steel. Materials Characterization, 106. 86 - 92. ISSN 1044-5803
Abstract
Abstract The potential for using graphite particles as an internal lubricant during machining is considered. Graphite particles were found to form during graphitisation of experimental medium-carbon steel alloyed with Si and Al. The graphite nucleation sites were strongly influenced by the starting microstructure, whether ferrite-pearlite, bainite or martensite, as revealed by light and electron microscopy. Favourable nucleation sites in the ferrite-pearlite starting microstructure were, not unexpectedly, found to be located within pearlite colonies, no doubt due to the presence of abundant cementite as a source of carbon. In consequence, the final distribution of graphite nodules in ferrite-pearlite microstructures was less uniform than for the bainite microstructure studied. In the case of martensite, this study found a predominance of nucleation at grain boundaries, again leading to less uniform graphite dispersions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2015, Elsevier Ltd. This is an author produced version of a paper published in Materials Characterization. Uploaded in accordance with the publisher's self-archiving policy |
Keywords: | Bainite; Ferrite/pearlite; Free-machining steel; Graphitization; Martensite |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Institute for Materials Research (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Jun 2015 13:33 |
Last Modified: | 15 May 2016 21:57 |
Published Version: | http://dx.doi.org/10.1016/j.matchar.2015.05.014 |
Status: | Published |
Publisher: | Elsevier Inc. |
Identification Number: | 10.1016/j.matchar.2015.05.014 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:86918 |