Effect of Fe-rich intermetallics on the microstructure and mechanical properties of thixoformed A380 aluminum alloy

İrizalp, Simge Gençalp; Saklakoğlu, Nurşen

doi:10.1016/j.jestch.2014.03.006

Cited by 47 publications

(35 citation statements)

References 22 publications

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“…They also point to the possibility of the formation of a similarly structured phase Al 16 Fe 1.7 Mn 2.3 Si 3 . In their research, G. Irizalp et al [24] demonstrate that in cast aluminum alloys, manganese reacts with iron, forming multi-component intermetallic phases in the form of precipitations, which assume different forms and chemical compositions, depending on the amount of manganese in the alloy. The phases present in the Al-Fe-Mn-Si system characterize in high hardness as well as thermal stability in the scope of the supersaturation temperatures of aluminum alloys, which can constitute an obstacle in the process of plastic treatment.…”

Section: Metallographic Microscopic Studiesmentioning

confidence: 99%

Influence of Plastic Strain Accumulation in Continuous Ingots during ECAP on Structure and Recrystallization Temperature of AlCu4MgSi Alloy

2020

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This work attempts to process AlCu4MgSi (AW 2017A) alloy continuous ingots by means of the equal channel angular pressing (ECAP) method. The equal channel angular pressing (ECAP) technique has been widely investigated in recent years as the most promising severe plastic deformation (SPD) method. The presented research was focused on the precise determination of the phase composition of the precipitates formed in the AlCu4MgSi alloy and its influence on intensive plastic deformation. In the second stage, the research was focused on explaining the recrystallization process. With the use of the high-temperature X-ray diffraction (HT-XRD) technique, the changes in the dislocation substructure at various recrystallization annealing temperatures were analyzed.

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Section: Metallographic Microscopic Studiesmentioning

confidence: 99%

Influence of Plastic Strain Accumulation in Continuous Ingots during ECAP on Structure and Recrystallization Temperature of AlCu4MgSi Alloy

2020

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“…11g and 1, 3, 9 and 10 in Fig. 12g, respectively) were identified in the literature as Al 24 Si 2 (FeMn) 6 and Al 15 Si 2 (FeMn) 3 [16][17][18]. This Fe-rich intermetallic can have a polyhedral or [16,17].…”

Section: Intermetallic Concentration and Morphologymentioning

confidence: 93%

Microstructural refinement of 355 aluminium alloys by ultrasonic melt treatment (UST)

Paula

Zoqui

2019

SN Appl. Sci.

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Chemical grain refining of high-silicon-content aluminium alloys, such as 355 alloy, is impaired by the high silicon content. One solution is the use of ultrasonic melt treatment (UST). This study sought to determine the duration of UST and type of horn (steel or Ti) required to achieve optimal grain refining in these alloys. Samples produced by conventional casting underwent UST for different times with steel and Ti horns and were compared with as-cast samples. For all the conditions studied, analysis of the samples showed that UST is an effective grain refining technique and yields satisfactory values of average grain size and primary and secondary dendrite arm spacing (λ 1 , λ 2) as well as low porosity. The chemical composition of the samples was analysed by SEM-EDS mapping and point analysis to identify the intermetallic phases before and after UST. Best results were achieved after only 20 s of UST with a steel horn. UST for this length of time with a steel horn produced a homogeneous microstructure and possible homogeneous mechanical properties. Grain size was 160 µm; primary dendrite arm spacing, or dendrite cell size, was 130 µm; secondary arm spacing was approximately 18 µm; and Vickers hardness was approximately 95 HV.

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“…The metallography of the as-cast Al 50 Ti 15 Cr 15 Mn 20 alloy indicated that the flake-shaped FCC phase was surrounded by the BCC phase, as illustrated in Figure 2A. Flake-shaped phases adversely affect mechanical properties because the stress concentration at the edges of flake-shaped phases would cause the cracks to propagate rapidly [19,20]. On contrary, the Al 50 Ti 20 Cr 20 Mn 10 alloy with the 35 vol.% BCC phase and a highly equi-axial shape FCC phase can yield high ductility due to the blunt edge of FCC phases.…”

Section: Theoretical Density (G/cm 3 )mentioning

confidence: 99%

Development of Novel Lightweight Dual-Phase Al-Ti-Cr-Mn-V Medium-Entropy Alloys with High Strength and Ductility

Liao

Chen

et al. 2020

Entropy

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A novel lightweight Al-Ti-Cr-Mn-V medium-entropy alloy (MEA) system was developed using a nonequiatiomic approach and alloys were produced through arc melting and drop casting. These alloys comprised a body-centered cubic (BCC) and face-centered cubic (FCC) dual phase with a density of approximately 4.5 g/cm3. However, the fraction of the BCC phase and morphology of the FCC phase can be controlled by incorporating other elements. The results of compression tests indicated that these Al-Ti-Cr-Mn-V alloys exhibited a prominent compression strength (~1940 MPa) and ductility (~30%). Moreover, homogenized samples maintained a high compression strength of 1900 MPa and similar ductility (30%). Due to the high specific compressive strength (0.433 GPa·g/cm3) and excellent combination of strength and ductility, the cast lightweight Al-Ti-Cr-Mn-V MEAs are a promising alloy system for application in transportation and energy industries.

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Effect of Fe-rich intermetallics on the microstructure and mechanical properties of thixoformed A380 aluminum alloy

Cited by 47 publications

References 22 publications

Influence of Plastic Strain Accumulation in Continuous Ingots during ECAP on Structure and Recrystallization Temperature of AlCu4MgSi Alloy

Influence of Plastic Strain Accumulation in Continuous Ingots during ECAP on Structure and Recrystallization Temperature of AlCu4MgSi Alloy

Microstructural refinement of 355 aluminium alloys by ultrasonic melt treatment (UST)

Development of Novel Lightweight Dual-Phase Al-Ti-Cr-Mn-V Medium-Entropy Alloys with High Strength and Ductility

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