Effect of alumina inclusions on microstructure and mechanical properties of 62 WC, 32 (Ti-W) C and 6 Co compacts

Article

Albdiry, Mushtaq and Alethari, Haydar. 2012. "Effect of alumina inclusions on microstructure and mechanical properties of 62 WC, 32 (Ti-W) C and 6 Co compacts." International Journal of Microstructure and Materials Properties. 7 (4), pp. 329-340. https://doi.org/10.1504/IJMMP.2012.048523
Article Title

Effect of alumina inclusions on microstructure and mechanical properties of 62 WC, 32 (Ti-W) C and 6 Co compacts

ERA Journal ID41275
Article CategoryArticle
AuthorsAlbdiry, Mushtaq (Author) and Alethari, Haydar (Author)
Journal TitleInternational Journal of Microstructure and Materials Properties
Journal Citation7 (4), pp. 329-340
Number of Pages12
Year2012
Place of PublicationGeneva, Switzerland
ISSN1741-8410
1741-8429
Digital Object Identifier (DOI)https://doi.org/10.1504/IJMMP.2012.048523
Web Address (URL)http://www.inderscience.com/offer.php?id=48523
Abstract

This investigation is aimed at understanding the role of adding ceramic inclusion, alumina (Al2O3) on the densification, microstructure and mechanical properties of cemented carbide cutting inserts. The samples were
prepared of an initial mixture of 62 WC, 32 (Ti-W) C and 6 Co wt% particulates; different additions of Al2O3 of 1, 2, 3 and 4 wt% were introduced to that mixture. The testing specimens were compacted via powder metallurgy at 200 MPa and sintered at 1,410°C under vacuum. The green and sintered densities have decreased; the figures of macrohardness, Vickers hardness and transverse rupture strength have also deteriorated with the increase of alumina content. The macrohardness has almost declined of 30% at 3% alumina. This is ascribed to the interfacial grain-boundary decohesion between Al2O3 and carbide particles as can be observed from scanning electron microscopy images which depicts the monolithic clusters in the final consolidation of the compacts.

Keywordspowder metallurgy; cemented carbides; alumina; inclusion; microstructure and materials properties
ANZSRC Field of Research 2020400406. Powder and particle technology
401607. Metals and alloy materials
401605. Functional materials
Public Notes

Copyright © 2012 Inderscience Enterprises Ltd. Permanent restricted access to published version due to publisher copyright policy.

Byline AffiliationsDepartment of Mechanical and Mechatronic Engineering
University of Babylon, Iraq
Institution of OriginUniversity of Southern Queensland
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