Microstructure and compressive deformation of hypereutectic Al-Si-Fe based P/M alloys fabricated by spark plasma sintering

DC FieldValueLanguage
dc.contributor.author김목순-
dc.date.accessioned2017-04-20T16:30:07Z-
dc.date.available2017-04-20T16:30:07Z-
dc.date.issued201408-
dc.identifier.issn1003-6326-
dc.identifier.other-INHA-Al−Si−Febasedalloysareattractivelight-weightstructuralmaterialsforautomotiveenginecomponentsbecauseoftheirhighwearresistance,lowdensityandlowthermalexpansion.Al−17Si−5Fe−2Cu−1Mg−1Ni−1Zralloyswereproducedincompactformbyasparkplasmasintering(SPS)techniqueusinggasatomizedpowders.Themeangrainsizeofthecompactwas530nm,andfineequiaxedgrainsanduniformlydistributedprecipitateswereobservedinthecompact.ThecompressivedeformationbehavioroftheSPSedmaterialswasexaminedatvarioustemperaturesandstrainrates.Allthetruestress−truestraincurvesshowedsteadystateflowafterreachingpeakstress.Thepeakstressdecreasedwithincreasingtesttemperatureanddecreasingstrainrate.Inthedeformedspecimens,theequiaxedgrainmorphologyandthedislocationmicrostructurewithintheequiaxedgrainswereobserved.Thesefactsstronglyindicatedtheoccurrenceofdynamicrecrystallizationduringhightemperaturedeformationofthepresentalloy.-
dc.identifier.uriAl−Si−Fe 基铝合金材料由于具有高耐磨性、低密度以及低热膨胀性能,因而主要用于汽车发动机部件。 利用气体雾化粉末,采用放电等离子体烧结技术制备 Al−17Si−5Fe−2Cu−1Mg−1Ni−1Zr 合金。所制备材料的晶粒 尺寸为 530 nm,并且观察到细等轴晶粒和均匀分布的析出物。研究了放电等离子体烧结技术制备的材料在不同温 度和应变速率下的压缩变形行为。结果表明,所有的真应力−真应变曲线在达到峰值应力后呈稳态流动趋势,随 着测试温度的升高和应变速率的降低,峰值应力呈下降趋势。在变形样品中,观察到了等轴晶粒和等轴晶粒中的 位错结构。这些现象说明,合金在高温变形过程中发生了动态再结晶。en_US
dc.identifier.urihttp://dspace.inha.ac.kr/handle/10505/39837-
dc.description2346~2351-
dc.description.abstractTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA-
dc.description.abstractVol24 Startpage 2346 Endpage 2351-
dc.languageDOI: 10.1016/S1003-6326(14)63355-0-
dc.publisherTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA-
dc.relation.ispartofseries24-
dc.subjectAl−Si−Fe alloy, powder metallurgy, spark plasma sintering, microstructure, deformation, Al−Si−Fe 合金, 粉末冶金, 放电等离子体技术, 显微组织, 变形-
dc.titleMicrostructure and compressive deformation of hypereutectic Al-Si-Fe based P/M alloys fabricated by spark plasma sintering-
dc.title.alternative放电等离子体烧结技术制备过共晶 Al−Si−Fe 粉末冶金 合金的显微组织和压缩变形行为-
dc.typeArticle-
dc.identifier.DOIAl−Si−Fe based alloys are attractive light-weight structural materials for automotive engine components because of their high wear resistance, low density and low thermal expansion. Al−17Si−5Fe−2Cu−1Mg−1Ni−1Zr alloys were produced in compact form by a spark plasma sintering (SPS) technique using gas atomized powders. The mean grain size of the compact was 530 nm, and fine equiaxed grains and uniformly distributed precipitates were observed in the compact. The compressive deformation behavior of the SPSed materials was examined at various temperatures and strain rates. All the true stress−true strain curves showed steady state flow after reaching peak stress. The peak stress decreased with increasing test temperature and decreasing strain rate. In the deformed specimens, the equiaxed grain morphology and the dislocation microstructure within the equiaxed grains were observed. These facts strongly indicated the occurrence of dynamic recrystallization during high temperature deformation of the present alloy.-
dc.contributor.alternativeJewoosoo KIM, Gwang-Seon JANG, Mok-Soon KIM, Jeong-Keun LEE-
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College of Engineering(공과대학) > Materials Science & Engineering (신소재공학) > Local Access Journal, Reports (신소재공학 논문, 보고서)
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