Understanding the effect of Ni content on microstructures and tensile properties of AlSi10Mg alloy samples under a variety of solidification rates

Moura, Danusa Araújo de; Gouveia, Guilherme Lisboa de; Gomes, Leonardo Fernandes; Spinelli, José Eduardo

doi:10.1016/j.jallcom.2022.166496

Cited by 4 publications

(1 citation statement)

References 42 publications

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“…Rejection of denser Ni and Co in the interdendritic liquid most likely induce a flow in the interdendritic channel towards the dendrite base. This flow destabilizes primary dendrite side walls, leading to increased secondary branching and reduced λ 2 25 . Regarding to the microstructural details, SEM/EDS analyses and results of the various phases formed can be seen in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

The Impacts of Co and Ni Additions to High Solute Content Fe-Contaminated Al alloys in Beneficing Microstructure and Tensile Properties

Xavier,

Spinelli

2024

Mat. Res.

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The accumulation of tramp impurities, particularly Fe, during recycling of Al alloys frequently leads to the production of coarse intermetallics during solidification, which affect final product mechanical properties. Because lowering the Fe concentration and/or using thermomechanical processing to subdivide the particles is expensive, it is preferred to modify the morphology, size, and distribution of the IMCs during solidification. Benefiting the properties of Al-contaminated alloys entails increased recyclability and a reduction in the usage of virgin primary Al and downcycled alloys. The Al-8%Si-0.8%Fe-2.5%Cu-1.0%Zn (in wt.%) alloy was modified with 0.7%Ni and 0.7%Co. Both dendritic growth and tensile properties were evaluated for the three alloys. The secondary dendrite arm spacing values (λ 2 ) were found very refined for all alloys. The λ 2 in the modified alloys was even more reduced. The Co addition of 0.7% reached higher values of tensile strength (220 MPa) as compared to the others without major losses in ductility. The addition of Co can enhance strength by up to 15%, considering more refined microstructures.

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Section: Resultsmentioning

confidence: 99%

The Impacts of Co and Ni Additions to High Solute Content Fe-Contaminated Al alloys in Beneficing Microstructure and Tensile Properties

Xavier,

Spinelli

2024

Mat. Res.

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Development and characterization of in‐situ nickel aluminide reinforced Al‐Si matrix composites by stir casting

Saiyathibrahim,

Jatti,

Dhanapal

et al. 2024

Engineering Reports

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Aluminium matrix composites (AMCs) exhibit promising mechanical properties that are required for the aeronautical and automotive industries. In the current research, A413 (eutectic AlSi) alloy is employed as matrix material, and nickel based trialuminide (Al3Ni) with primary Si particles as reinforcements to manufacture aluminium matrix composites through the stir casting process. A total of three varieties of composite alloys containing 3, 6, and 9 wt% of nickel were used to fabricate stir cast composites, and their microstructural features, along with mechanical properties, such as tensile strength, impact strength, and hardness, were evaluated. Furthermore, the dry sliding wear behavior for three different applied loads (10, 20, and 30 N) was studied. Scanning electron microscopy (SEM) revealed nucleation of Al3Ni nickel trialuminide and increase of primary Si phases as well as exhibited even dissemination of such reinforcements in α‐Al. The composite with the highest nickel content (9 wt%) had a microstructure that consisted of 31 vol% in‐situ Al3Ni intermetallic and 8.1 vol% primary Si particles. This composite demonstrated a maximum increase of 25.93% in hardness and 40.30% in tensile strength. The quality index values of composites with in‐situ reinforcements were higher compared to that of A413 alloy, which had the lowest quality index value of 248.83 MPa, representing a 9.91% decrease. The impact strength of the composite was found to be reduced by a maximum of 50% and showed a significant loss in ductility also when compared with A413 aluminium alloy. Wear resistance was found to be increased with the evolution of in‐situ reinforcements inside the matrix, whereas an increase in applied load resulted in a higher wear rate. The uniform dispersion and good interfacial bonding between the aluminium matrix and in‐situ reinforcements (nickel trialuminide and primary Si) are showing preeminent mechanical properties and can be a novel composite material for industrial applications.

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Influence of Ni on the Microstructures and Mechanical Properties of Heat-Treated Al-Cu-Ce-Mn-Zr Alloys

Yuan

et al. 2023

Crystals

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In order to enhance the high-temperature mechanical performance to meet service requirements, the microstructures and tensile properties of heat-treated Al-8.4Cu-2.3Ce-1.0Mn-0.2Zr-xNi (x = 0, 0.5, 1.0, 2.0, 4.0 wt.%) were investigated. The metallographic analysis techniques have been used to examine the microstructural changes with different Ni contents. Results show that after adding 0.5% Ni to the Al-8.4Cu-2.3Ce-1.0Mn-0.2Zr alloy, the spheroidized Al7Cu4Ni phase is formed. With Ni content further increasing, the Al8CeCu4 and Al24MnCu8Ce3 phases disappear, and the nano-sized Al20Cu2Mn3 and Al2Cu phases decrease gradually. When Ni content reaches 4.0%, the Al3CuNi phase appears. It turns out that the addition of 0.5% Ni has significantly improved the tensile properties at 400 °C. The ultimate tensile strength, yield strength, and elongation of Al-8.4Cu-2.3Ce-1.0Mn-0.2Zr-0.5Ni alloy at 400 °C reach 103 MPa, 93 Mpa, and 18.0%, respectively, which makes the alloy possible to be employed at 400 °C. The intermetallic micro-skeleton, composed of thermostable Al8CeCu4, Al24MnCu8Ce3, Al16Cu4Mn2Ce, and Al7Cu4Ni phases at the grain boundaries as well as nano-sized Al20Cu2Mn3 and Al2Cu precipitates in the grains, contributes to the good elevated-temperature tensile strength. The fracture mechanism is changed from quasi-cleavage at ambient temperature to coexistence of quasi-cleavage and dimple at 400 °C.

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Understanding the effect of Ni content on microstructures and tensile properties of AlSi10Mg alloy samples under a variety of solidification rates

Cited by 4 publications

References 42 publications

The Impacts of Co and Ni Additions to High Solute Content Fe-Contaminated Al alloys in Beneficing Microstructure and Tensile Properties

The Impacts of Co and Ni Additions to High Solute Content Fe-Contaminated Al alloys in Beneficing Microstructure and Tensile Properties

Development and characterization of in‐situ nickel aluminide reinforced Al‐Si matrix composites by stir casting

Influence of Ni on the Microstructures and Mechanical Properties of Heat-Treated Al-Cu-Ce-Mn-Zr Alloys

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