Outstanding Tensile Ductility in High Iron-Containing Al-Si-Cu Alloys

Freitas, Brenda Juliet Martins; Jorge, Alberto Moreira; Zepon, Guilherme; Kiminami, Cláudio Shyinti; Botta, Walter José; Bolfarini, Claudemiro

doi:10.1007/s11661-020-05744-x

Cited by 8 publications

(2 citation statements)

References 28 publications

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“…This has led to the development of a variety of aluminum-based alloys with enhanced mechanical and tribological properties for a wide range of engineering applications. These alloys exhibit high strength to weight ratio, good machinability and lower cost of fabrication [ 1 , 2 , 3 , 4 ]. Further enhancement in the properties has been achieved by the development of aluminum metal matrix composites (MMCs) by adding different reinforcements [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Thermal Evaluation of Aluminum Hybrid Nanocomposite Reinforced with Alumina and Graphene Oxide

et al. 2021

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Aluminum matrix composites are among the most widely used metal matrix composites in several industries, such as aircraft, electronics, automobile, and aerospace, due to their high specific strength, durability, structural rigidity and high corrosion resistance. However, owing to their low hardness and wear resistance, their usage is limited in demanding applications, especially in harsh environments. In the present work, aluminum hybrid nanocomposite reinforced with alumina (Al2O3) and graphene oxide (GO) possessing enhanced mechanical and thermal properties was developed using spark plasma sintering (SPS) technique. The focus of the study was to optimize the concentration of Al2O3 and GO content in the composite to improve the mechanical and thermal properties such as hardness, compressive strength, heat flow, and thermal expansion. The nanocomposites were characterized by FESEM, EDS, XRD and Raman spectroscopy to investigate their morphology and structural properties. In the first phase, different volume percent of alumina (10%, 20%, 30%) were used as reinforcement in the aluminum matrix to obtain (Al+X% Al2O3) composite with the best mechanical/thermal properties which was found to be 10 V% of Al2O3. In the second phase, a hybrid nanocomposite was developed by reinforcing the (Al + 10 V% Al2O3) with different weight percent (0.25%, 0.5%, 1%) of GO to obtain the optimum composition with improved mechanical/thermal properties. Results revealed that the Al\10 V% Al2O3\0.25 wt.% GO hybrid nanocomposite showed the highest improvement of about 13% in hardness and 34% in compressive strength as compared to the Al\10V% Al2O3 composite. Moreover, the hybrid nanocomposite Al\10 V% Al2O3\0.25 wt.% GO also displayed the lowest thermal expansion.

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Section: Introductionmentioning

confidence: 99%

Mechanical and Thermal Evaluation of Aluminum Hybrid Nanocomposite Reinforced with Alumina and Graphene Oxide

et al. 2021

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“…Recycled casting Al alloys with high Fe content showed a significant improvement in ductility after thermomechanical processing. [ 11,17,18 ] Increase in ductility was mainly related to the roundness of the intermetallics as well as their improved cohesion with the α‐Al matrix. For these wrought alloys, the homogenously distributed secondary phases may increase the cohesion of the particles with the matrix acting as a powerful pinning core for crack propagation.…”

Section: Introductionmentioning

confidence: 99%

The Roles of Ni and Co in Dendritic Growth and Tensile Properties of Fe‐Containing Al–Si–Cu–Zn Scraps under Slow and Fast Solidification Cooling

et al. 2021

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Studies of Fe‐contaminated Al‐based scraps have drawn attention for years. However, little has been researched about the effects of cobalt (Co) and nickel (Ni) additions to contaminated scraps both under slow solidification (directional solidification, DS) and fast solidification regime (copper mold centrifugal casting, CC). As such, the current study examines a representative low‐alloy Al–Si chemistry from industrial scraps, i.e., the Al–7%Si–0.6%Fe–0.35%Cu–0.25%Zn (% by weight). This alloy is changed independently using Ni and Co. It is observed that a mixture of uneven distributed α and β Fe‐bearing particles prevails for all tested alloys and solidification conditions. The coexistence of both phases agrees with the charts proposed by Gorny's work for the range of secondary dendritic spacing, λ 2, observed. Although the Fe‐containing particles are smaller for fast‐solidified samples, they still maintain the acute morphology and, in some cases, the Chinese script shape. This results in a reduction in ductility of the order of 65% for the nonmodified and Ni‐modified samples considering mean λ 2 varying from 20 μm (DS) to 6.5 μm (CC), despite improvements in mechanical strength. Furthermore, addition of Co results in a higher number of Fe‐based particles within the microstructure. In this case, the largest particle/α‐Al interfacial area results in slightly poor ductility (~6–8%) and higher strength (175–205 MPa), with less ductility loss when DS and CC samples are compared.

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Ductile and Corrosion-Resistant Aluminum Alloy From Recycled Secondary Aluminum Scraps Containing Iron Impurities

Freitas

Koga

Mendes³

et al. 2023

Metall Mater Trans B

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Outstanding Tensile Ductility in High Iron-Containing Al-Si-Cu Alloys

Cited by 8 publications

References 28 publications

Mechanical and Thermal Evaluation of Aluminum Hybrid Nanocomposite Reinforced with Alumina and Graphene Oxide

Mechanical and Thermal Evaluation of Aluminum Hybrid Nanocomposite Reinforced with Alumina and Graphene Oxide

The Roles of Ni and Co in Dendritic Growth and Tensile Properties of Fe‐Containing Al–Si–Cu–Zn Scraps under Slow and Fast Solidification Cooling

Ductile and Corrosion-Resistant Aluminum Alloy From Recycled Secondary Aluminum Scraps Containing Iron Impurities

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