Aluminum-silicon alloys.

Kitaoka, Sanji; Fujikura, Chozo; Kamio, Akihiko

doi:10.2464/jilm.38.426

Cited by 21 publications

(5 citation statements)

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“…Kitaoka [9] reviewed the castability of Al-Si binary casting alloys, concluding that solidification cracks, flowability of molten metals, and shrinkage cavities varied drastically depending on the silicon content. Additionally, Kitaoka et al [10] showed that the tensile strength and breaking elongation of Al-Si binary alloys remarkably increased and decreased, respectively, with increasing silicon content. Based on this knowledge, the silicon content in Al-Si SLM materials is also expected to affect the densification behavior during SLM and the properties of the materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of silicon content on densification, mechanical and thermal properties of Al-xSi binary alloys fabricated using selective laser melting

Kimura

Nakamoto

Mizuno

et al. 2017

Materials Science and Engineering: A

142

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The effect of the silicon content on the densification of Al-xSi binary alloys (x = 0, 1, 4, 7, 10, 12, and 20 mass%) fabricated using selective laser melting (SLM) were systematically studied. By optimizing laser scanning parameters for each Al-xSi powder, almost fully dense SLM samples (more than 99.5% relative density) could be achieved for the Al-0Si (pure aluminum), and Al-4~20Si alloys. The Al-1Si SLM sample, on the other hand, contained many microcracks, considered to be solidification cracks. The Al-1Si SLM sample, in the solid-liquid coexisting state, was brittle and no healing of

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Section: Introductionmentioning

confidence: 99%

Effect of silicon content on densification, mechanical and thermal properties of Al-xSi binary alloys fabricated using selective laser melting

Kimura

Nakamoto

Mizuno

et al. 2017

Materials Science and Engineering: A

142

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“…In recent years, the process of heat treatment for Al -Si base alloys containing Cu and/or Mg element has been investigated in certain aspects [1][2][3][4]. The age-hardening mechanisms responsible for strengthening is based on the formation of intermetallic compounds during decomposition of a metastable supersaturated solid solution obtained by solution treatment and quenching (precipitation hardening).…”

Section: Introductionmentioning

confidence: 99%

Age-hardening behavior of cast Al–Si base alloy

Zhao

et al. 2004

Materials Letters

217

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“…In one of the representative applications of Al alloys in the automobile industry, Al cast alloys are used for making cylinder blocks and heads in diesel or gasoline engines [ 1 , 2 , 3 , 4 ]. Al–Si alloys are a general series of cast-type alloys [ 5 ] and are generally used as Al alloy components formed by the casting process. The high thermal conductivity and low density of Al–Si alloys make them favorable alternatives to cast iron in the fabrication of automotive engine components.…”

Section: Introductionmentioning

confidence: 99%

“…The addition of Cu as an alloying element can improve the strength of Al–Si alloys, and Al–Si–Cu ternary alloys are generally used as conventional materials in cylinder heads fabricated via sand and gravity die casting processes [ 6 , 7 , 8 , 9 , 10 ]. One of the conventional Al–Si–Cu cast alloys is the AC2B alloy (denoted according to Japan Industry Standard: JIS), with a nominal composition of Al–6Si–3Cu (mass%) [ 5 ]. On being subjected to heat treatment, the AC2B alloy can achieve improved strength by precipitation hardening.…”

Section: Introductionmentioning

confidence: 99%

Precipitation Hardening at Elevated Temperatures above 400 °C and Subsequent Natural Age Hardening of Commercial Al–Si–Cu Alloy

Takata

Suzuki

et al. 2021

Materials

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The precipitation of intermetallic phases and the associated hardening by artificial aging treatments at elevated temperatures above 400 °C were systematically investigated in the commercially available AC2B alloy with a nominal composition of Al–6Si–3Cu (mass%). The natural age hardening of the artificially aged samples at various temperatures was also examined. A slight increase in hardness (approximately 5 HV) of the AC2B alloy was observed at an elevated temperature of 480 °C. The hardness change is attributed to the precipitation of metastable phases associated with the α-Al15(Fe, Mn)3Si2 phase containing a large amount of impurity elements (Fe and Mn). At a lower temperature of 400 °C, a slight artificial-age hardening appeared. Subsequently, the hardness decreased moderately. This phenomenon was attributed to the precipitation of stable θ-Al2Cu and Q-Al4Cu2Mg8Si6 phases and their coarsening after a long duration. The precipitation sequence was rationalized by thermodynamic calculations for the Al–Si–Cu–Fe–Mn–Mg system. The natural age-hardening behavior significantly varied depending on the prior artificial aging temperatures ranging from 400 °C to 500 °C. The natural age-hardening was found to strongly depend on the solute contents of Cu and Si in the Al matrix. This study provides fundamental insights into controlling the strength level of commercial Al–Si–Cu cast alloys with impurity elements using the cooling process after solution treatment at elevated temperatures above 400 °C.

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Aluminum-silicon alloys.

Cited by 21 publications

References 0 publications

Effect of silicon content on densification, mechanical and thermal properties of Al-xSi binary alloys fabricated using selective laser melting

Effect of silicon content on densification, mechanical and thermal properties of Al-xSi binary alloys fabricated using selective laser melting

Age-hardening behavior of cast Al–Si base alloy

Precipitation Hardening at Elevated Temperatures above 400 °C and Subsequent Natural Age Hardening of Commercial Al–Si–Cu Alloy

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