Microdeformationn behaviour of Al-SiC metal matrix composites

dc.contributor.authorMyriounis, D. P.en
dc.contributor.authorHasan, S. T.en
dc.contributor.authorMatikas, T. E.en
dc.date.accessioned2015-11-24T17:35:56Z
dc.date.available2015-11-24T17:35:56Z
dc.identifier.issn0927-6440-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/14187
dc.rightsDefault Licence-
dc.subjectparticulate reinforced aluminium alloysen
dc.subjectmetal matrix compositesen
dc.subjectinterfacial strengthen
dc.subjectdeformationen
dc.subjectprecipitationen
dc.subjectaluminumen
dc.subjectmicrostructureen
dc.subjectdeformationen
dc.subjectdiffusionen
dc.subjectfractureen
dc.titleMicrodeformationn behaviour of Al-SiC metal matrix compositesen
heal.abstractThe satisfactory performance of metal matrix composites depends critically on their integrity, the heart of which is the quality of the matrix-reinforcement interface. The nature of the interface depends in turn on the processing of the MMC component. At the micro-level, the development of local concentration gradients around the reinforcement can be very different according to the nominal conditions. These concentration gradients are due to the metal matrix attempting to deform during processing. This plays a crucial role in the micro-structural events of segregation and precipitation at the matrix-reinforcement interface. Equilibrium segregation occurs as a result of impurity atoms relaxing in disordered sites found at interfaces, such as grain boundaries, whereas non-equilibrium segregation arises because of imbalances in point defect concentrations set up around interfaces during non-equilibrium heat treatment processing. The amount and width of segregation depend very much on (a) the heat treatment temperature and the cooling rate, (b) the concentration of solute atoms and (c) the binding energy between solute atoms and vacancies. An aluminium-silicon-magnesium alloy matrix reinforced with varying amounts of silicon carbide particles was used in this study. A method of calculation has been applied to predict the interfacial fracture strength of aluminium, in the presence of magnesium segregation at metal matrix interface. Preliminary results show that the model succeeds in predicting the trends in relation to segregation and intergranular fracture strength behaviour in these materials. Microhardness profiles of reinforced and un-reinforced aluminium alloys are reported. The presence of precipitates at alloy-reinforcement interface identified by Nano-SEM.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.primaryDoi 10.1163/156855408784655292-
heal.identifier.secondary<Go to ISI>://000258259400004-
heal.journalNameComposite Interfacesen
heal.journalTypepeer reviewed-
heal.languageen-
heal.publicationDate2008-
heal.publisherTaylor & Francisen
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικώνel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

Αρχεία

Φάκελος/Πακέτο αδειών

Προβολή: 1 - 1 of 1
Φόρτωση...
Μικρογραφία εικόνας
Ονομα:
license.txt
Μέγεθος:
1.74 KB
Μορφότυπο:
Item-specific license agreed upon to submission
Περιγραφή: