Characterization Of Dendritic Microstructure, Intermetallic Phases, And Hardness Of Directionally Solidified Al-mg And Al-mg-si Alloys

dc.creatorBrito
dc.creatorCrystopher; Costa
dc.creatorThiago A.; Vida
dc.creatorTalita A.; Bertelli
dc.creatorFelipe; Cheung
dc.creatorNoe; Spinelli
dc.creatorJose Eduardo; Garcia
dc.creatorAmauri
dc.date2015-AUG
dc.date2016-06-07T13:34:10Z
dc.date2016-06-07T13:34:10Z
dc.date.accessioned2018-03-29T01:49:52Z
dc.date.available2018-03-29T01:49:52Z
dc.identifier
dc.identifierCharacterization Of Dendritic Microstructure, Intermetallic Phases, And Hardness Of Directionally Solidified Al-mg And Al-mg-si Alloys. Springer, v. 46A, p. 3342-3355 AUG-2015.
dc.identifier1073-5623
dc.identifierWOS:000356728100006
dc.identifier10.1007/s11661-015-2967-4
dc.identifierhttp://link.springer.com/article/10.1007%2Fs11661-015-2967-4
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/243861
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1307559
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionDespite the widespread application of Al-Mg-Si alloys, especially in the automotive industry, interrelations of solidification thermal parameters (cooling rate and growth rate), microstructure, and hardness are not properly established. For instance, the control of the scale of the microstructure on both Al-Mg and Al-Mg-Si alloys by adequate pre-programming of the solidification thermal parameters remains a task to be accomplished. In the present study, the directional solidification (DS) of these alloys under unsteady-state solidification conditions is investigated in an attempt to characterize the evolution of microstructural features, macrosegregation, and hardness as a function of local solidification thermal parameters along the DS castings length. Silicon addition to the Al-Mg alloy was found not to affect the sizes of primary and secondary dendrite arm spacings, but induced the onset of tertiary dendritic branches and affected also the size and distribution of intermetallic particles within the interdendritic regions. The Al-Mg-Si alloy is characterized by a more complex arrangement of phases, including binary (alpha-Al + Mg2Si) and refined ternary (alpha-Al + Mg2Si + AlFe(Si) eutectic mixtures. As a consequence, a higher Vickers hardness profile is shown to be associated with the ternary Al-Mg-Si alloy DS casting. For both alloys examined, hardness is shown to increase with the increase in the microstructural spacing according to Hall-Petch type equations. (C) The Minerals, Metals & Materials Society and ASM International 2015
dc.description46A
dc.description8
dc.description
dc.description3342
dc.description3355
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFAEPEX-UNICAMP
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFAPESP [2012/08494-0, 2012/16328-2, 2013/23396-7]
dc.description
dc.description
dc.description
dc.languageen
dc.publisherSPRINGER
dc.publisher
dc.publisherNEW YORK
dc.relationMETALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
dc.rightsfechado
dc.sourceWOS
dc.subjectUnsteady-state Conditions
dc.subjectCooling Rate
dc.subjectTensile Properties
dc.subjectAluminum-alloys
dc.subjectArm Spacings
dc.subjectBehavior
dc.subjectGrowth
dc.subjectCu
dc.subjectPredictions
dc.subjectConvection
dc.titleCharacterization Of Dendritic Microstructure, Intermetallic Phases, And Hardness Of Directionally Solidified Al-mg And Al-mg-si Alloys
dc.typeArtículos de revistas


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