Interconnection between the solidification and precipitation hardening processes of an AlSiCu alloy

Magno, Igor A.; Souza, Fabrício; Costa, Thiago A.; Nascimento, Jacson Malcher; Silva, Adrina P.; Rocha, Otávio Fernandes Lima da

doi:10.1080/02670836.2019.1591028

Cited by 16 publications

(6 citation statements)

References 49 publications

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“…Fe-rich IMCs such as Al 7 Cu 2 Fe within remnant interdendritic zones have been observed, since these particles are insoluble in the matrix at the solution treatment temperature, as can be confirmed by the solidification path presented by Barros et al [14]. Contrary characteristics were observed for horizontally solidified Al–Si–Cu [15,17,21,37] and Al–Si–Mg [38] multicomponent alloys and subsequently heat treated by T6, since dendritic microstructure has been observed in the samples of these alloys after solution treatment, except for the tertiary branches that were collapsed. It is important to highlight that Si is insoluble in the dendritic matrix during solution treatment, which acts as a stabilising element of the dendritic network.…”

Section: Resultsmentioning

confidence: 79%

Length scale of solidification microstructure tailoring corrosion resistance and microhardness in T6 heat treatment of an Al–Cu–Mg alloy

Barros

Cruz

Silva

et al. 2020

Corrosion Engineering, Science and Technology

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The combined effects of solidification microstructure refining scale and T6 heat treatment conditions on corrosion behaviour and Vickers microhardness of an Al-3 wt-% Cu-0.5 wt-% Mg alloy were studied. Then, representative samples having quite distinct primary dendritic spacings were solution treated at 495°C for 3 h and artificially aged at 200°C during different times. It was found that the feature of finer solidification microstructure having higher corrosion current density and higher microhardness can be inherited to subsequent T6 heat treatments. In contrast to the as-cast condition, the aging times of 0.5 and 1 h were shown to promote lower corrosion rates without corrosion occurring at the central region of Al-rich matrix. On the other hand, the aging time of 3 h led to a significant decrease in both the corrosion resistance and the microhardness. Finally, a comparative analysis with other works from the literature was also conducted.

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Section: Resultsmentioning

confidence: 79%

Length scale of solidification microstructure tailoring corrosion resistance and microhardness in T6 heat treatment of an Al–Cu–Mg alloy

Barros

Cruz

Silva

et al. 2020

Corrosion Engineering, Science and Technology

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“…5. Finer microstructures have also allowed better dissolution of Al 2 Cu and obtaining spherical-like Si particles during Treatment by T6 in AlSiCu alloys [17,18,27,29].…”

Section: Resultsmentioning

confidence: 99%

Solidification and Heat-treatment Conditions Affecting the Tensile Properties and Fracture Feature of an Automotive AlSiMg Alloy

Barbosa

Azevedo

Costa

et al. 2023

Silicon

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In this work, a study on the interrelationship between the solidi cation and heat-treatment processes parameters with tensile properties and fracture feature was performed with an automotive AlSiMg alloy. For that, samples of the horizontally solidi ed Al7Si0.3Mg (wt.%) alloy were subjected to the T6-heat treatment as well as tensile tests were performed on both investigated samples, under conditions established from the literature. The solidi cation conditions such as growth and cooling rates and the secondary dendritic spacing (V L and T R and λ 2 , respectively) and their effects on the ultimate tensile strength (σ UTS ) and elongation (E%) were evaluated. It was observed higher σ UTS values in the heat-treated samples and ner microstructures have inherited a better E% performance. Analysis by SEM/EDS fractography on both samples showed a mix between brittle and ductile fractures, constituted by cleavage facets, secondary cracks, facets covered with micro-voids, tear ridges and dimples. It has allowed deducing on the occurrence of a transition from ductile to brittle fracture along the solidi ed ingot as well as the predominance of brittle fracture in the heat-treated samples.

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“…The stainless-steel mold used has a wall thickness of 3mm, a length of 160mm, a height of 60mm and a width of 60mm. More details on horizontal solidification device can be found in recently published works [24][25][26]. The thermocouples were used to monitor temperatures along the length of the casting and these data were acquired automatically.…”

Section: Methodsmentioning

confidence: 99%

Influence of Solidification Parameters and Solute Content on the Machinability of Two Lead-Free Babbit Metals

Costa Maciel

2023

Current Trends in Eng Sc

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Studies suggest that white metal Sn-Sb alloys are the most commonly type of babbit metal used in industry. However, it is necessary to evaluate manufacturing characteristics and solute contents that leads the best machining conditions. This work presents a correlation between solidification parameters and machinability of Sn-2.0wt%Sb and Sn-5.5wt%Sb alloys, solidified in a horizontal directional device, evaluating the influence of solute content on these results. Cutting temperatures were measured in dry necking processes along the length of the ingot. It was observed that the reverse cellular-dendritic transition influenced the cutting temperature results. The range of cell and dendrite spacings varies approximately from 40 to 330 μm on the Sn-2.0wt%Sb alloy and from 15 to 240 μm on the Sn-5,5wt%Sb alloy. In the cellular region, higher values are found for the Sn-5.5wt%Sb alloy, but in the dendritic region, these values were higher for the Sn-2.0wt%Sb alloy.

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Interconnection between the solidification and precipitation hardening processes of an AlSiCu alloy

Cited by 16 publications

References 49 publications

Length scale of solidification microstructure tailoring corrosion resistance and microhardness in T6 heat treatment of an Al–Cu–Mg alloy

Length scale of solidification microstructure tailoring corrosion resistance and microhardness in T6 heat treatment of an Al–Cu–Mg alloy

Solidification and Heat-treatment Conditions Affecting the Tensile Properties and Fracture Feature of an Automotive AlSiMg Alloy

Influence of Solidification Parameters and Solute Content on the Machinability of Two Lead-Free Babbit Metals

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