Effect of porosity and micro-defects on plastically deformed porous materials

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	2014-03-01T01:15:18Z
dc.date.available	2014-03-01T01:15:18Z
dc.date.issued	1999	en
dc.identifier.issn	0924-0136	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13423
dc.subject	porosity	en
dc.subject	micro-defects	en
dc.subject	plastically deformed 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	Crack initiation	en
dc.subject.other	Crack propagation	en
dc.subject.other	Defects	en
dc.subject.other	Inclusions	en
dc.subject.other	Mechanical properties	en
dc.subject.other	Numerical methods	en
dc.subject.other	Plastic deformation	en
dc.subject.other	Plastic flow	en
dc.subject.other	Plasticity	en
dc.subject.other	Porosity	en
dc.subject.other	Powder metal products	en
dc.subject.other	Sintering	en
dc.subject.other	Microdefects	en
dc.subject.other	Plastically deformed porous materials	en
dc.subject.other	Porous materials	en
dc.title	Effect of porosity and micro-defects on plastically deformed porous materials	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0924-0136(99)00265-4	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0924-0136(99)00265-4	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	A modified plasticity theory for sintered powder materials, taking into account the real complex state of porosity and micro-defects (cracks, non-metallic inclusions, etc.) is proposed. Equations for plastic flow were developed and methods for calculating the true mechanical properties are suggested. The yield criterion derived, in conjuction with simple uniaxial compression tests conducted on specimens of the porous material, may evaluate the real state of the material porosity related to micro-defects which may constitute the sources for the initiation and propagation of cracks, even in high compressive stress fields such as those developed in most manufacturing processes, as well as the formation of new pores during plastic deformation. (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)00265-4	en
dc.identifier.isi	ISI:000083884000016	en
dc.identifier.volume	96	en
dc.identifier.issue	1-3	en
dc.identifier.spage	117	en
dc.identifier.epage	123	en