Powder metallurgy Al–6Cr–2Fe–1Ti alloy prepared by melt atomisation and hot ultra-high pressure compaction

Dám, Karel; Vojtěch, Dalibor; Průša, Filip

doi:10.1016/j.msea.2012.10.017

Cited by 22 publications

(7 citation statements)

References 22 publications

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“…Transition metals-modified Al-Fe-Cr-X bulk alloys possess relatively high strength and creep resistance up to 573 K. Their preserved mechanical properties at elevated temperature have been attributed also to the presence of small intermetallic particles (e.g. Al 13 Cr 2 , Al 13 Fe 4 , Al 3 Nb) that are finely dispersed within the α-Al matrix and are characterised by excellent thermal stability and high hardness [6][7][8][9][10]. The Al 13 Cr 2 phase, also called Al 45 Cr 7 or Al 7 Cr depending on the exact stoichiometry, is an intermetallic phase with a complex, asymmetric crystal structure.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, phase formation and properties of rapid solidified Al–Fe–Cr–Ti alloys

Araújo

Micheloti

Kiminami

et al. 2020

Materials Science and Technology

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Improvements in the mechanical strength of Al–Fe–Cr–Ti alloys have been demonstrated when non-equilibrium microstructures are developed. This paper investigated the effect of cooling rate and composition on the phase formation, microstructure and properties of new Al96.6Fe1.5Cr1.7Ti0.2 and Al91.6Fe4.9Cr2.2Ti1.3 (at.-%) alloys. Wedge-shaped samples produced by suction casting were characterised by optical, scanning electron microscopy, differential scanning calorimetry, X-ray diffraction, energy dispersive X-ray spectroscopy and microhardness. The results showed that the morphology and size of the phases precedent of the flower-like phases change from small, spherical particles to large flower-like phases with decreasing the cooling rate. The presence of intermetallic phases Al13Fe4, Al13Cr2 and Al3Ti in the Al91.6Fe4.9Cr2.2Ti1.3 alloy, resulted in a hardness 1.6 times higher compared to the Al96.6Fe1.5Cr1.7Ti0.2 alloy.

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Section: Introductionmentioning

confidence: 99%

Microstructure, phase formation and properties of rapid solidified Al–Fe–Cr–Ti alloys

Araújo

Micheloti

Kiminami

et al. 2020

Materials Science and Technology

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“…Figures 1a, b display the volume density distribution and the accumulated mass distribution versus particle diameter for PH and PS powders as atomized. These curves are important to evaluate the distribution within a collection of particles and as commonly observed in gas atomized powders [10,15], the powders produced in this work showed a wide particle size range. As shown in Table 1, PH was produced under higher GMR and atomization pressure.…”

Section: Morphological Characterizationmentioning

confidence: 86%

“…Al-Fe-Cr-Ti alloys have been produced by gas atomization [2,10] aiming to obtain non-equilibrium microstructures. However, the biggest challenge is to produce a non-equilibrium and homogeneously dispersed microstructure.…”

Section: Methodsmentioning

confidence: 99%

Morphological and microstructural characterization of Al95Fe2 Cr2 Ti1 powders produced by two different gas atomizers

Araújo¹,

Micheloti²,

Kiminami³

et al. 2021

Tecnol. Metal. Mater. Min.

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“…Through the current work, PM technology is shown to be a viable technology for processing Al-based alloys with high contents of transition metals [8]. The thermal stability and creep tests reveal that the PM alloys outperform (by more than a factor of three in the creep test) the casting alloy, which is commonly considered to be thermally stable [10,11]. In this study, an industrial feasibility study was performed for a large-scale production of Al-Mo and Al-Mn alloy prepared in the form of melt spun ribbons and subsequent consolidation of discrete RS particles by extrusion.…”

Section: Introductionmentioning

confidence: 88%

Rapidly solidified Al-Mo and Al-Mn ribbons: microstructure and mechanical properties of extruded profiles

CAVOJSKY¹,

Sr.²,

JANIČKOVIČ³

et al. 2021

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Two alloys of composition Al-Mo(3; 5) at.% and Al-Mn(3; 5) at.% were studied in the form of compacted cuts of rapid solidification ribbons. The structure of samples was composed of fcc α-Al solid solution oversaturated with Mo and Mn, intermetallic Al12Mo and Al6Mn phases, all in ultrafine submicron grain size. The kinetics of structural changes and their effect on mechanical properties were described as a function of annealing temperature and time. The discrete RS particles (chopped ribbons) were compacted into simple structural profiles using conventional and relatively inexpensive direct extrusion method. All compacted profiles exhibited similar structure as precursor materials, incl. even grain size. Almost theoretical density with no identified porosity and gas entrapment was achieved. The extruded profiles were extremely thermally stable; no structural changes were detected even after annealing at 300 • C for 24 h. The best mechanical properties were obtained for compacted RS AlMo5 ribbons: their UTS at room temperature exceeded 385 MPa at 5 % elongation to fracture. UTS at 300 • C/24 h regularly exceeded 375 MPa what is 5 times higher than UTS of conventionally used Al alloys. Young's modulus (E) of extruded compact at RT was 90 GPa what means an increase of more than 25 % in E/ρ compared with standard Al. K e y w o r d s : aluminium, mechanical properties, melt-spinning, rapid solidification, thermal stability

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Powder metallurgy Al–6Cr–2Fe–1Ti alloy prepared by melt atomisation and hot ultra-high pressure compaction

Cited by 22 publications

References 22 publications

Microstructure, phase formation and properties of rapid solidified Al–Fe–Cr–Ti alloys

Microstructure, phase formation and properties of rapid solidified Al–Fe–Cr–Ti alloys

Morphological and microstructural characterization of Al95Fe2 Cr2 Ti1 powders produced by two different gas atomizers

Rapidly solidified Al-Mo and Al-Mn ribbons: microstructure and mechanical properties of extruded profiles

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