Article (Scientific journals)
Unveiling the complex wear sequence of a directed energy deposited 316L+WC hierarchical composite against alumina
Maurizi-Enrici, Tommaso; Mario, Daniele; Dedry, Olivier et al.
2023In Journal of Materials Research and Technology
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Keywords :
Directed energy deposition; Metal matrix composite; Dry sliding interrupted tests; Wear cyclical regime; Wear mechanisms
Abstract :
[en] In this work, the addition of 20 vol. % of tungsten carbide (WC) to 316L powder processed by direct energy deposition (DED) leads to a hierarchical composite. The modified austenitic microstructure is reinforced by partially dissolved WC, and by a network of solidification carbides. Wear tests for DEDed composite sliding against alumina were carried out, highlighting a cyclical wear regime different from the steady state one achieved on the reference DEDed 316L under similar conditions. The wear behaviour of the DEDed composite sliding against alumina was investigated when considering significant variations of both the friction coefficient (CoF) and the penetration depth (PDe). A novel approach based on interrupted wear tests was applied to better understand the role of the complex hierarchical microstructure of the DEDed composite on its wear behaviour. The wear tracks were analysed through scanning electron microscopy and profilometer at the different stages. This approach allows to observe the evolution of the wear rate with the progress of the test and to identify the corresponding mechanisms that involve adhesive, abrasive and oxidative wears. The influence of WC reinforcements, of the composite matrix or of the counterbody considered solely or in association under dry sliding conditions are discussed thus helping to unveil the complex wear sequence of the DEDed composite. The interrupted wear tests approach also helps to highlight the contribution of the short run-in period and that of the subsequent cyclical regime to the wear rate while considering repeated compaction, breakdown and reformation of a protective tribolayer.
Disciplines :
Materials science & engineering
Author, co-author :
Maurizi-Enrici, Tommaso  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Mario, Daniele
Dedry, Olivier  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Castagne, Sylvie;  KU Leuven - Katholieke Universiteit Leuven [BE] > Department of Mechanical Engineering and Flanders Make@KU Leuven-M&A
Mertens, Anne  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Tchuindjang, Jérôme Tchoufack  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Language :
English
Title :
Unveiling the complex wear sequence of a directed energy deposited 316L+WC hierarchical composite against alumina
Publication date :
24 July 2023
Journal title :
Journal of Materials Research and Technology
ISSN :
2238-7854
eISSN :
2214-0697
Publisher :
Elsevier BV
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
IAWATHA
Funders :
FEDER - Fonds Européen de Développement Régional [BE]
Available on ORBi :
since 06 August 2023

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