Structural characterisation and stability of new nanoquasicrystalline Al-based alloys

Galano, M.; Audebert, F.; Cantor, B.; Stone, Ian

doi:10.1016/j.msea.2003.10.066

Cited by 48 publications

(41 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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). With enough time of permanence at high temperature, i.e.…”

Section: Resultsmentioning

confidence: 99%

Aleaciones cuasicristalinas Al93Fe3Cr2Ti2

Natale¹,

Cremaschi²,

Todd³

et al. 2015

REVMETAL

View full text Add to dashboard Cite

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

show abstract

Section: Resultsmentioning

confidence: 99%

Aleaciones cuasicristalinas Al93Fe3Cr2Ti2

Natale¹,

Cremaschi²,

Todd³

et al. 2015

REVMETAL

View full text Add to dashboard Cite

show abstract

“…Galano, Audebert, Stone, Prima, Tomut and Cantor [35][36][37][38][39][40][41][42][43][44][45] investigated the structure of a wide range of melt spun alloys in the AlFeCrTiVNbTa system. The alloys were based on the generic formula Al93Fe3Cr2ETM2 where ETM is an early transition metal.…”

Section: Melt Spun Microstructuresmentioning

confidence: 99%

Multicomponent and High Entropy Alloys

Cantor

2014

Entropy

501

187

View full text Add to dashboard Cite

This paper describes some underlying principles of multicomponent and high entropy alloys, and gives some examples of these materials. Different types of multicomponent alloy and different methods of accessing multicomponent phase space are discussed. The alloys were manufactured by conventional and high speed solidification techniques, and their macroscopic, microscopic and nanoscale structures were studied by optical, X-ray and electron microscope methods. They exhibit a variety of amorphous, quasicrystalline, dendritic and eutectic structures.Keywords: alloying strategy; amorphous alloys; fcc single phase; Gibbs phase rule; high entropy alloys; icosahedral phase; multicomponent alloys; quasicrystals; solid solubility Multicomponent Alloys Alloying StrategiesThe conventional way of developing a new material is to select the main component based upon some primary property requirement, and to use alloying additions to confer secondary properties. This strategy has led to many successful multicomponent materials with a good balance of engineering properties. Typical examples include high-temperature nickel superalloys and corrosion-resistant stainless steels. In some cases two principal components are used, such as in copper-zinc brasses or alumino-silicate refractories.Cantor [1] was the first to point out that this kind of conventional alloying strategy leads to an enormous amount of knowledge about materials based on one or sometimes two components, but little or no knowledge about materials containing several main components in approximately equal proportions. Information and understanding about alloys close to the corners and edges of a OPEN ACCESS

show abstract

“…The imperfections can be of the geometrical or structural (as clusters in amorphous matrix of Al-based al-(823) loys) origin [1,7,5]. The dominant geometrical imperfections on the ribbon surface are inherent properties of the metallic glass prepared by melt spinning method.…”

Section: Resultsmentioning

confidence: 99%

Low Temperature Failure of Al₉₀Fe₇Ta₃Amorphous Alloys

et al. 2010

View full text Add to dashboard Cite

show abstract

Structural characterisation and stability of new nanoquasicrystalline Al-based alloys

Cited by 48 publications

References 25 publications

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>

Multicomponent and High Entropy Alloys

Low Temperature Failure of Al₉₀Fe₇Ta₃Amorphous Alloys

Contact Info

Product

Resources

About

Structural characterisation and stability of new nanoquasicrystalline Al-based alloys

Cited by 48 publications

References 25 publications

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>

Multicomponent and High Entropy Alloys

Low Temperature Failure of Al90Fe7Ta3Amorphous Alloys

Contact Info

Product

Resources

About

Low Temperature Failure of Al₉₀Fe₇Ta₃Amorphous Alloys