Modeling of the influence of coarsening on viscoplastic behavior of a 319 foundry aluminum alloy

Martinez, Rémi; Russier, V.; Couzinié, Jean-Philippe; Guillot, Ivan; Cailletaud, Georges

doi:10.1016/j.msea.2012.07.096

Cited by 14 publications

(9 citation statements)

References 53 publications

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“…Cu atoms changed lattice distortion of α -Al substrate and obstructed the dislocation movement. Moreover, a pinning effect caused by Al 2 Cu precipitate may hinder the dislocation movement [40].…”

Section: Resultsmentioning

confidence: 99%

Effect of Cu on microarc oxidation coated Al–xCu alloys

Dai

Zhang

et al. 2021

Surface Engineering

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Microarc oxidation (MAO) coatings were produced on the Al-Cu alloys at different oxidation times. Surface morphologies, phase composition and residual stress, and wear resistance were analysed by SEM and a laser scanning confocal microscopy, X-ray diffraction, and reciprocating friction and wear tester, respectively. Increases in surface roughness, porosity, cracks, thickness, and α-Al 2 O 3 content were found in the MAO coatings on Al-4.5Cu alloy. Presence of intermetallic Al 2 Cu in the Al-4.5Cu alloy improved wear resistance and induced residual compressive stress formation in the coatings. Heat accumulation of intermetallic Al 2 Cu was the key factor that led to the differences in coating microstructure and nature of residual stress. In addition, mechanical properties of the coated samples were slightly changed compared to that of bare Al-Cu alloys. Presence of intermetallic Al 2 Cu was advantageous to wear resistance and oxide film formation of MAO coated Al-Cu alloys.

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Section: Resultsmentioning

confidence: 99%

Effect of Cu on microarc oxidation coated Al–xCu alloys

Dai

Zhang

et al. 2021

Surface Engineering

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“…The microstructure is essentially formed by a dendritic-like Al-rich primary phase and an intergranular Si-rich main eutectic. The latter is shown in detail in Figure 2d [22,[36][37][38]. The latter morphology is found in abundance in the microstructure of the B319+Fe alloy.…”

Section: Microstructural Characterizationmentioning

confidence: 92%

“…The "arms" of the skeleton shape develop according to the direction in which the solute flows in the surrounding liquid, giving the characteristic Chinese script morphology. The polyhedral morphology is formed by the nucleation of the α-Fe phase directly from the liquid before the α-Al phase in regions with a higher solute concentration [22,[37][38][39]. The rounder shape is formed because of the higher thermodynamic stability of a lower ratio of surface energy to volume energy.…”

Section: Microstructural Evolution During Isothermal Heat Treatmentmentioning

confidence: 99%

Thixoforming of an Fe-Rich Al-Si-Cu Alloy—Thermodynamic Characterization, Microstructural Evolution, and Rheological Behavior

Brollo

Proni

Zoqui

2018

Metals

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Thixoforming depends on three factors: (a) the thermodynamic stability of the solid-to-liquid transformation in the presence of temperature fluctuations; (b) the size and morphology of the solid particles in the liquid in the semisolid state; and (c) the rheology of the semisolid slurry during formation. In this study, these parameters were characterized for an Al-Si-Cu alloy with a high Fe content (B319+Fe alloy). Fe is usually found in raw metal produced by recycling, and its removal increases processing costs. This study is an attempt to use this lower-cost alloy for the thixoforming route. Thermodynamic analysis was performed by numerical simulation (under Scheil conditions) and the application of the differentiation method (DM) to differential scanning calorimetry (DSC) curves recorded during heating cycles up to 700 • C at 5, 10, 15, 20, and 25 • C/min. The processing window was evaluated by comparing the results of the DM and those of the analysis of open-die thixoforged samples after isothermal heat treatment at 575, 582, 591, and 595 • C for 0, 30, 60, and 90 s. The microstructural and rheological behavior of the semisolid slurry was analyzed at 591 and 595 • C for all four soak times. Isothermal heat treatment caused the refinement and spheroidization of the solid phase. Good agreement between the predicted thermodynamic behavior and the microstructural behavior of the thixoformed B319+Fe alloy samples was observed. Although the alloy exhibited a coarse microstructure, it was microstructurally and rheologically stable at all temperatures and for all the soak times studied, indicating that B319+Fe is a promising raw material for thixoforming.

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“…Air cooling system is by compressed air direct cooling piezoelectric ceramic piece position. According to the previous work [20,21], the ultrasonic cavitation effect in the slurry zone of the Al melt can greatly inhibit the growth of grain. The Cu elements can more evenly distributed in the matrix.…”

Section: Experimental and Characterisationmentioning

confidence: 99%

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

Jiang

et al. 2023

Materials Science and Technology

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High-intensity ultrasonic melt treatment technique plays a key role in improving the performance of large-scale 2219 alloy ingot (Φ630 mm × 4500 mm). In this current paper, ultrasonic treatment-assisted casting techniques were developed and applied to manufacture large-scale 2219 aluminium (Al) alloy ingot in direct chill casting (DC). The industry-level experiments revealed that the α-Al grains of the ingot with ultrasonic (USDC) were refined, the area fraction of the coarse Al2Cu eutectic phase showed a decreasing trend, and the mechanical properties were lightly improved than without ultrasonic ingot (DC). Based on the present results and previous proposed hypotheses, the synergistic effects of cavitation and acoustic streaming were considered as the dominant mechanisms of USDC.

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Modeling of the influence of coarsening on viscoplastic behavior of a 319 foundry aluminum alloy

Cited by 14 publications

References 53 publications

Effect of Cu on microarc oxidation coated Al–xCu alloys

Effect of Cu on microarc oxidation coated Al–xCu alloys

Thixoforming of an Fe-Rich Al-Si-Cu Alloy—Thermodynamic Characterization, Microstructural Evolution, and Rheological Behavior

The microstructure and mechanical properties of 2219 alloy during ultrasonic treatment

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