Multiscale approach of hardness in aluminium alloy: Consideration of rate dependent behaviour

Charitidis, CA

dc.contributor.author	Charitidis, CA	en
dc.date.accessioned	2014-03-01T02:53:56Z
dc.date.available	2014-03-01T02:53:56Z
dc.date.issued	2012	en
dc.identifier.issn	02670836	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36491
dc.subject	Aluminium alloy	en
dc.subject	Deformation	en
dc.subject	Hardness	en
dc.subject	Indentation	en
dc.subject	Multiscale	en
dc.subject	Rate dependent	en
dc.title	Multiscale approach of hardness in aluminium alloy: Consideration of rate dependent behaviour	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1179/1743284711Y.0000000122	en
heal.identifier.secondary	http://dx.doi.org/10.1179/1743284711Y.0000000122	en
heal.publicationDate	2012	en
heal.abstract	Many materials display strong indentation size effects regarding hardness when the material and characteristic length scales associated with non-uniform plastic deformation are of the same order at micrometre and submicrometre levels. The failure of classical mechanics to predict these size effects has led to a multiscale mathematical approach that could significantly impact the issue of bridging the nano-, micro- and mesoscales. In the present work, a multiscale approach of hardness in engineering aluminium alloys is performed by mathematical modelling based on gradient methods and verification by nanoindentation and microindentation experiments. Furthermore, in order to bridge the different scales and to consider comprehensively these issues, rate dependent measurements are considered. The highly localised plastic deformation appearance under the nanoindentation is also investigated through pile-up deformation consideration. © 2012 Institute of Materials, Minerals and Mining.	en
heal.journalName	Materials Science and Technology (United Kingdom)	en
dc.identifier.doi	10.1179/1743284711Y.0000000122	en
dc.identifier.volume	28	en
dc.identifier.issue	9-10	en
dc.identifier.spage	1127	en
dc.identifier.epage	1134	en