Nanoquasicrystalline Al–Fe–Cr–Nb alloys produced by powder metallurgy

dc.contributor.authorPeres, Maurício Mirdhaui
dc.contributor.authorAudebert, Fernando E.
dc.contributor.authorGalano, Marina L.
dc.contributor.authorRios, C. Triveño
dc.contributor.authorKasama, H.
dc.contributor.authorKiminami, Claudio Shyinti
dc.contributor.authorBotta, Walter Jose
dc.contributor.authorBolfarini, Claudemiro
dc.date.accessioned2021-08-16T14:28:19Z
dc.date.available2021-08-16T14:28:19Z
dc.date.issued2013-11-15
dc.description.resumoNano-quasicrystalline Al–Fe–Cr based alloys produced by rapid solidification processes exhibit high strength at elevated temperatures. Nevertheless, the quasicrystalline particles in these systems become unstable at high temperature limiting the industrial applications. In early works, it was observed that the use of Nb or Ta increases the stability of the Al–Fe–Cr quasicrystalline phase delaying the microstructural transformation to higher temperatures. Thus, these nano-quasicrystalline Al-based alloys have become promising new high strength material to be used at elevated temperatures in the automotive and aero-nautical industries. In previous works, nano-quasicrystalline Al–Fe–Cr–Nb based alloys were obtained by rapid solidification using the melt-spinning technique. In order to obtain bulk alloys for industrial applications other fabrication routes such as powder production by gas atomization followed by compaction and extrusion are required. In the present work, the production of Al–Fe–Cr–Nb based alloys by powder atomization at laboratory scale was investigated. The powders obtained were sieved in different ranges of sizes and the microstructures were characterised by means of X-ray diffraction, scanning and transmission electron microscopy, and energy dispersive of X-ray analysis. Mechanical properties have been measured by compression tests at room temperature and at 250 C. It was observed that a very high temperature is required to produce these alloys by gas atomization; the icosahedral quasicrystalline phase can be retained after the atomization in powder sizes typically under 75 lm, and also after the extrusion at 375 C. The extruded bars were able to retain a very high strength at elevated temperature, around 60% of the yield stress at room temperature, in contrast with the 10–30% typically obtained for many commercial Al alloyspt_BR
dc.identifier.citationAUDEBERT, F.; GALANO, M.; RIOS, C. Triveño; KASAMA, H.; PERES, M.; KIMINAMI, C.; BOTTA, W.J.; BOLFARINI, C.. Nanoquasicrystalline Al–Fe–Cr–Nb alloys produced by powder metallurgy. Journal Of Alloys And Compounds, [S.L.], v. 577, p. 650-657, nov. 2013. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838813015600?via%3Dihub. Acesso em: 02 mar. 2021. http://dx.doi.org/10.1016/j.jallcom.2013.06.162.pt_BR
dc.identifier.doi10.1016/j.jallcom.2013.06.162
dc.identifier.issn0925-8388
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/33164
dc.languageenpt_BR
dc.publisherElsevierpt_BR
dc.rightsAttribution 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/br/*
dc.subjectAluminium alloyspt_BR
dc.subjectQuasicrystalspt_BR
dc.subjectRapid solidificationpt_BR
dc.subjectPowder metallurgypt_BR
dc.titleNanoquasicrystalline Al–Fe–Cr–Nb alloys produced by powder metallurgypt_BR
dc.typearticlept_BR

Arquivos

Pacote Original

Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
NanoquasicrystallineAlloysProduced_PERES_2013.pdf
Tamanho:
1.56 MB
Formato:
Adobe Portable Document Format
Nenhuma Miniatura disponível
Baixar

Licença do Pacote

Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.45 KB
Formato:
Item-specific license agreed upon to submission
Nenhuma Miniatura disponível
Baixar