Influence of Thermal Parameters, Microstructure, and Morphology of Si on Machinability of an Al–7.0 wt.% Si Alloy Directionally Solidified

Silva, Cássio; Leal, Layo R. M.; Guimarães, Emanuelle C.; Júnior, Paulo M.; Moreira, Antonio Luciano Seabra; Rocha, Otávio Fernandes Lima da; Silva, Adrina P.

doi:10.1155/2018/9512957

Cited by 14 publications

(23 citation statements)

References 37 publications

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“…, whose exponent (-2/3) has been validated by several experimental investigations on unsteady-state directional solidification of aluminum-based binary and multicomponent alloys, for both horizontal and vertical directions 2,16,17,23,[25][26][27][28]38,39 . Among the works on transient solidification, it is emphasized those reported for binary Al-Si 2,38,39 and multicomponent Al-Si-(Cu and Mg) 23,[25][26][27][28]30 alloys.…”

Section: Introductionmentioning

confidence: 82%

Relationship Between Aluminum-Rich/Intermetallic Phases and Microhardness of a Horizontally Solidified AlSiMgFe Alloy

et al. 2018

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An experimental study with an A356-AlSiMgFe alloy was developed to evaluate the microhardness performance in the microstructure resulting of an unsteady-state horizontal solidification process. The Al-7wt%Si-0.3wt%Mg-0.15wt%Fe alloy was elaborated and directionally solidified in a water-cooled horizontal solidification device. In order to experimentally determine the cooling and growth rates (V L and T R , respectively), a thermal analysis was also conducted during solidification. Microstructural characterization by optical microscopy, SEM/EDS elemental mapping and microanalysis of the punctual EDS compositions allowed to observe the presence of an Al-rich dendritic phase (Al (α)) with interdendritic phases second composed of an eutectic mixture: Al (α-eutectic) + Si + Al 8 Mg 3 FeSi 6(π) + Mg 2 Si (θ). Furthermore, the dendritic microstructure was characterized by measuring the secondary dendritic spacings (λ 2) along the horizontally solidified ingot. Higher HV values were observed within the eutectic mixture.

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Section: Introductionmentioning

confidence: 82%

Relationship Between Aluminum-Rich/Intermetallic Phases and Microhardness of a Horizontally Solidified AlSiMgFe Alloy

et al. 2018

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“…AISI T6, for example, has carbon and vanadium as elements directly responsible for wear resistance and high hot hardness; tungsten, molybdenum, and cobalt as elements that improve cutting properties and increase the hardness at elevated temperatures; and chromium as the element which has the property of improving the oxidation resistance and the secondary hardening (Hetzner, 2001). In their studies, Silva et al (2018), when analyzing the high-speed steel tool wear in an Al-Si alloy, found that for certain solidification parameters not only the end of life of this tool type is not reached, but the wear values are not high, justifying the use of this cutting tool.…”

Section: Methodsmentioning

confidence: 99%

“…After the necking tests, the tool flank wear was measured. Following the methodology used by Silva et al (2018), the tools were submitted to visual and metric analysis. In this way, a Zoom stereomicroscope, was used after the machining to obtain the images of chisels at a magnification of 20x.…”

Section: Methodsmentioning

confidence: 99%

“…Current studies have analyzed the significant correlation between microstructural parameters of solidification and machinability, however, there are few studies in the literature that do this analysis in non-ferrous alloys. Silva et al (2018), when analyzing machinability by establishing a correlation between shear temperature and the microstructure in the columnar zone of an Al-7wt% Si ingot, solidified in a horizontal directional system, concluded that the maximum and average shear temperatures increase with increasing of the secondary dendritic spacing. They also found that, for positions further away from the metal/mold interface, in the columnar zone, tool wear decreases.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the lathe rotation and structural parameters in the machinability of an Al-3.0wt% si alloy / Influência da rotação do torno e parâmetros estruturais na usinabilidade de uma liga Al-3%si

Monteiro¹,

Figueiredo²,

Costa³

et al. 2022

BJDV

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The metal alloys structures resulting from the solidification process can influence the machinability of these materials, however, few studies have attempted to establish relationships between microstructure and machining properties. This study aimed to verify the influence of lathe rotation and secondary dendritic arm spacing, λ2, on the maximum flank wear (Vbmax) of an Al-3.0wt.%Si alloy solidified in a horizontal directional device under unsteady-state conditions. After the analysis of the results it can be observed that for the same rotation, the variation of Vbmax as a function of λ2 can be expressed through a power-type function, , where “a” and “b” are constants, denoting, therefore, that bigger secondary dendritic arm spacing contributes to greater tool wear. It was also been found that, for the same dendritic arm spacing, higher rotations contribute to greater tool flank wear.

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“…In metal cutting operations, a huge amount of cutting energy is converted to heat energy at the tool-chip interface due to sliding friction [35,36]. It is essential to measure the heat generated in terms of temperature at the cutting tool tip or primary cutting edge to assess the effectiveness of cutting fluid used.…”

Section: Cutting Temperaturementioning

confidence: 99%

Performance evaluation of novel developed biodegradable metal working fluid during turning of AISI 420 material

Nune

Chaganti

2020

J Braz. Soc. Mech. Sci. Eng.

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In the present scenario, metalworking fluids or cutting fluids are contributing a significant amount among the consumables used in the machining industry. Most of the industries use oil-based cutting fluids, which may cause skin and respiratoryrelated health issues to workers when they are exposed for longer hours. These limitations lead to developing non-oil-based novel cutting fluids to the industry. In this work, the biodegradability performance of newly developed cutting fluid was measured and compared with commonly used oil-based cutting fluid by the industries. Also, the performance of newly developed cutting fluid was investigated in the machining of AISI 420 stainless steel turbine blade material with an uncoated carbide tool. To circulate and recycle the developed cutting fluid at the machining zone, an experimental setup was developed. The developed cutting fluid performance was estimated over dry and oil-based cutting fluid environment conditions. The experiments were designed based on Taguchi L 27 orthogonal array while keeping the material removal rate as constant at 668 mm 3 s −1. The control factors were cutting environment, depth of cut, feed, and cutting speed. An optimal control parameter combination for minimal surface roughness of 0.31 μm, tool wear 18.7 μm, and temperature 178 °C was obtained. This study is expected to deliver a scientific path toward the novel development of non-oil-based cutting fluids for enhancing the machining quality and safety.

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Influence of Thermal Parameters, Microstructure, and Morphology of Si on Machinability of an Al–7.0 wt.% Si Alloy Directionally Solidified

Cited by 14 publications

References 37 publications

Relationship Between Aluminum-Rich/Intermetallic Phases and Microhardness of a Horizontally Solidified AlSiMgFe Alloy

Relationship Between Aluminum-Rich/Intermetallic Phases and Microhardness of a Horizontally Solidified AlSiMgFe Alloy

Influence of the lathe rotation and structural parameters in the machinability of an Al-3.0wt% si alloy / Influência da rotação do torno e parâmetros estruturais na usinabilidade de uma liga Al-3%si

Performance evaluation of novel developed biodegradable metal working fluid during turning of AISI 420 material

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