Bulk Nanostructured Aluminium Alloy Al&lt;sub&gt;93&lt;/sub&gt;Fe&lt;sub&gt;3&lt;/sub&gt;Cr&lt;sub&gt;2&lt;/sub&gt;Ti&lt;sub&gt;2&lt;/sub&gt;: Processing and Characterisation

Chlup, Zdeněk; Todd, Iain; Lieblich, Marcela; Chlupová, Alice; O’Dwyer, J.

doi:10.4028/www.scientific.net/msf.426-432.2417

Cited by 11 publications

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“…As has been seen above, the QC phase present in the alloy studied in this work is quite stable, and thus, it would contribute to the high mechanical properties of this alloy at high temperatures (Chlup et al, 2003;Galano et al, 2009a;Todd et al, 2004). Effectively, Fe and Cr are quasicrystal formers in Al base alloys, and Ti produces a significant refinement of the icosahedral particle size as well as an increase of the stability (Galano et al, 2004).…”

Section: Resultsmentioning

confidence: 69%

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Aleaciones cuasicristalinas Al93Fe3Cr2Ti2

Natale¹,

Cremaschi²,

Todd³

et al. 2015

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Aluminium alloy powder having a nominal composition of Al 93 Fe 3 Cr 2 Ti 2 (at%) has been prepared using gas atomisation. The atomised powder present a microstructure of an aluminium matrix reinforced with a spherical quasicrystalline icosahedral phase, in the range of nanometre in size. The powder was consolidated into bars using warm extrusion. The microstructure of the extruded bars retains the quasicrystalline microstructure and the bars present outstanding mechanical properties, i.e. proof stress of 280 MPa at 300 °C. Upon heating the microstructure evolves towards the equilibrium. The thermal evolution was investigated by means of x-ray diffraction, differential scanning calorimeter, scanning electron microscopy and transmission electron microscopy. According to these observations a transformation in two steps is proposed. A first step consists in the decomposition of the supersaturated solid solution of the matrix and the quasicrystals, and a second step in the transformation of the quasicrystals into the equilibrium phases. 93 Fe 3 Cr 2 Ti 2 . Se ha obtenido por atomización por gas polvo de la aleación Al 93 Fe 3 Cr 2 Ti 2 (at%). Este polvo presenta una microestructura de una matriz de aluminio reforzada por precipitados icosaédricos de tamaño nanométrico. El polvo fue consolidado por extrusión en forma de barras cilíndricas. La microestructura de las barras retiene la microestructura cuasicristalina de las partículas de polvo. El material consolidado presenta propiedades mecánicas prometedoras, como un límite elástico de 280 MPA a 300 °C. Con los tratamientos térmicos, la microestructura evoluciona hacia el equilibrio. Esta evolución se estudia por difracción de rayos x, calorimetría diferencial de barrido, microscopías electrónicas de barrido y de transmisión. A la luz de los resultados obtenidos se propone que la transformación de las fases con el tiempo de tratamiento térmico ocurre en dos pasos. Primeramente, tiene lugar la descomposición de la solución solida sobresaturada, tanto en la matriz como en los cuasicristales, y posteriormente los cuasicristales se transforman en las fases de equilibrio del sistema: α RESUMEN: Aleaciones cuasicristalinas Al

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Section: Resultsmentioning

confidence: 69%

“…The Al 93 Fe 3 Cr 2 Ti 2 extruded bars (Chlup et al, 2003) show high strength at elevated temperatures, with a proof stress of 280 MPa at 300 °C and an elongation of 1.8%, Table 1. These good mechanical properties decrease with temperature.…”

Section: Introductionmentioning

confidence: 99%

Aleaciones cuasicristalinas Al93Fe3Cr2Ti2

Natale¹,

Cremaschi²,

Todd³

et al. 2015

REVMETAL

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“…The resulting bulk alloys consisted mainly of icosahedral particles embedded in an a-Al matrix, and exhibited excellent elevated temperature ultimate tensile strength (UTS) of 520 MPa at 200°C and 360 MPa at 300°C. Chlup et al [3] also studied the same alloys produced in bulk shape by extrusion from gas-atomized powders. They obtained extruded bars with proof strength of 200 MPa at 350°C.…”

Section: Introductionmentioning

confidence: 96%

“…However, nanostructured materials with high strength generally suffer from insufficient ductility and reduced toughness compared with conventional microcrystalline materials [1]. On the other hand, a metal matrix nanocomposite, the nanoquasicrystalline Al 93 Fe 3 Cr 2 Ti 2 (at.%) alloy, showed an excellent balance of mechanical properties at elevated temperature [2,3], with higher strength and elongation at high temperature than commercial Al alloys such as AA-2618 or hypereutectic Al-Si-based alloys [2,3]. Inoue and Kimura [2] studied bulk extruded Al 93 Fe 3 Cr 2 Ti 2 samples produced from gasatomized powders with particle size fractions below 125 lm.…”

Section: Introductionmentioning

confidence: 98%

Nanoquasicrystalline Al–Fe–Cr-based alloys. Part II. Mechanical properties

et al. 2009

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“…The powder particles were obtained by gas atomization and the consolidation of the powders was achieved via warm extrusion [1,2]. The evolution of the microstructure during processing as well as with further thermal treatments was investigated.…”

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Thermal evolution of nanoquasicrystalline Al93Fe3Cr2Ti2 alloy

Cremaschi

Natale

Lieblich

2007

Journal of Alloys and Compounds

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In this work, thermal evolution of bulk nanoquasicrystalline Al 93 Fe 3 Cr 2 Ti 2 material, obtained by consolidation of nanoquasicrystalline powder particles, is studied. The powder particles were obtained by gas atomization and the consolidation of the powders was achieved via warm extrusion [1,2]. The evolution of the microstructure during processing as well as with further thermal treatments was investigated. The consolidated material contains spherical particles of an icosahedral i-phase of around 200 nm in diameter. The quasicrystalline phase is detected even after 1 h at 500 • C, and afterwards, it evolves through a metastable Al 6 Fe phase to the equilibrium phases.

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Bulk Nanostructured Aluminium Alloy Al<sub>93</sub>Fe<sub>3</sub>Cr<sub>2</sub>Ti<sub>2</sub>: Processing and Characterisation

Cited by 11 publications

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Aleaciones cuasicristalinas Al<sub>93</sub>Fe<sub>3</sub>Cr<sub>2</sub>Ti<sub>2</sub>

Aleaciones cuasicristalinas Al<sub>93</sub>Fe<sub>3</sub>Cr<sub>2</sub>Ti<sub>2</sub>

Nanoquasicrystalline Al–Fe–Cr-based alloys. Part II. Mechanical properties

Thermal evolution of nanoquasicrystalline Al93Fe3Cr2Ti2 alloy

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