Mechanical characterization of Ti(C,N)-based cermets fabricated through different colloidal processing routes

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Show simple item record Dios Pérez, Miguel de Gordo Odériz, Elena Alvaredo Olmos, Paula Kraleva, I. González, Z. Ferrari, Begoña Bermejo, Raúl 2018-04-17T09:09:40Z 2020-01-25T00:00:04Z 2018-01-25
dc.identifier.bibliographicCitation Journal of Alloys and Compounds, 732, (Jan. 2018), 806-817.
dc.identifier.issn 0925-8388
dc.description.abstract In this work the influence of different colloidal processing routes on the mechanical behavior of several Ti(C,N)-based cermets has been studied. The materials were designed with a Ti(C, N) content ranging between 80 and 85 vol %, in a Fe-Ni alloy matrix (with and without carbon addition). Three processing techniques were investigated: (i) Slip Casting (SC), (ii) Slip Casting + Cold Isostatic Pressing (SC+CIP), and (iii) Spray-Dry + Uniaxial Pressing (SDP). Biaxial strength distributions were determined in all samples using the ball-on-three-balls (B3B) method on disc-shaped specimens. Results were interpreted in the framework of Weibull theory. The characteristic strength ranged between 1090 MPa and 1870 MPa. A fractographic analysis performed on selected specimens showed different critical flaws, depending on the processing route, related to the composition and porosity level in each case. Single Edge V-Notched Beam (SEVNB) specimens fabricated with SDP were tested under 4-point-bending, in order to identify the effect of Fe-Ni content and carbon addition on their fracture resistance. Detailed fractographic analyses revealed slightly different mechanisms of fracture associated with the Fe-Ni and carbon content. Fracture toughness values ranging between similar to 12 and similar to 14 MPa m(1/2) were measured. Based upon these findings the SDP route is proposed to improve both the strength and toughness of Ti(C, N) cermets, which can be enhanced by the addition of carbon during the colloidal processing.
dc.description.sponsorship The authors acknowledge the financial support from the Spanish Government through the projects MAT2015-70780-C4-1-P and MAT2015-70780-C4-2-P, and the Regional Government of Madrid through the program MULTIMAT-CHALLENGE, ref. S2013/MIT-2862. M.Dios acknowledges MINECO through the grant BES-2013-065760.
dc.format.extent 11
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2017 Elsevier B.V. All rights reserved
dc.subject.other Colloidal processing
dc.subject.other Powder metallurgy techniques
dc.subject.other Ti(C,N)-based cermets
dc.subject.other Biaxial strength
dc.subject.other Fracture
dc.title Mechanical characterization of Ti(C,N)-based cermets fabricated through different colloidal processing routes
dc.type article
dc.subject.eciencia Materiales
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. MAT2015-70780-C4-1-P
dc.relation.projectID Gobierno de España. MAT2015-70780-C4-2-P
dc.relation.projectID Comunidad de Madrid. S2013/MIT-2862/MULTIMAT-CHALLENGE
dc.relation.projectID Gobierno de España. BES-2013-065760
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 806
dc.identifier.publicationissue January 2018
dc.identifier.publicationlastpage 817
dc.identifier.publicationtitle Journal of Alloys and Compounds
dc.identifier.publicationvolume 732
dc.identifier.uxxi AR/0000020834
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