Open-die forging of sintered cylindrical billets: an analytical approach

Mamalis, AG; Petrossian, GL; Manolakos, DE

dc.contributor.author	Mamalis, AG	en
dc.contributor.author	Petrossian, GL	en
dc.contributor.author	Manolakos, DE	en
dc.date.accessioned	2014-03-01T01:14:58Z
dc.date.available	2014-03-01T01:14:58Z
dc.date.issued	1999	en
dc.identifier.issn	0924-0136	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13282
dc.subject	forging/upsetting	en
dc.subject	plasticity/porosity	en
dc.subject	porous materials	en
dc.subject.classification	Engineering, Industrial	en
dc.subject.classification	Engineering, Manufacturing	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Billets (metal bars)	en
dc.subject.other	Computer simulation	en
dc.subject.other	Dies	en
dc.subject.other	Friction	en
dc.subject.other	Interfaces (materials)	en
dc.subject.other	Mechanical properties	en
dc.subject.other	Porosity	en
dc.subject.other	Porous materials	en
dc.subject.other	Sintering	en
dc.subject.other	Upsetting (forming)	en
dc.subject.other	Axisymmetric cylindrical billets	en
dc.subject.other	Forging upsetting	en
dc.subject.other	Plasticity porosity	en
dc.subject.other	Porous billets	en
dc.subject.other	Sintered cylindrical billets	en
dc.subject.other	Forging	en
dc.title	Open-die forging of sintered cylindrical billets: an analytical approach	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0924-0136(99)00266-6	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0924-0136(99)00266-6	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	The open-die forging (upsetting) of sintered porous materials is used widely as one of the key metal processing operations for fabricating various engineering products, and in some cases, for predicting the mechanical properties of such materials. In the present paper, an analysis of the upsetting of axisymmetric cylindrical billets of porous materials is made on the basis of plasticity theory. A newly established yield function for porous materials - proposed by the authors - is applied to simulate the consolidation of porous billets, taking into account the current state of porosity at each stage of deformation. The proposed theoretical model, combined with the concepts of the "slab method" and assuming suitable friction conditions at the workpiece/tool interface, provides with a valuable design tool, allowing for a more precise evaluation of the process loading and the shape changes of the porous billets obtained during upsetting. (C) 1999 Elsevier Science S.A. All rights reserved.	en
heal.publisher	Elsevier Science S.A., Lausanne, Switzerland	en
heal.journalName	Journal of Materials Processing Technology	en
dc.identifier.doi	10.1016/S0924-0136(99)00266-6	en
dc.identifier.isi	ISI:000083884000015	en
dc.identifier.volume	96	en
dc.identifier.issue	1-3	en
dc.identifier.spage	112	en
dc.identifier.epage	116	en