A new high-strength and corrosion-resistant Al–Si based casting alloy

Liang, Zhumei; Ye, Bing; Zhang, Lin; Wang, Q.G.; Yang, Wei; Wang, Q.D.

doi:10.1016/j.matlet.2013.01.112

Cited by 50 publications

(12 citation statements)

References 12 publications

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“…The EDS profiles of Al, Si, and O showed the depletion of aluminum and the enrichment of silicon in the correspondence of the attack ( Figure 3 ). The selective dissolution of α-aluminum phase with respect to silicon particles is due to the higher practical nobility of the silicon particles [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior of Heat-Treated AlSi10Mg Manufactured by Laser Powder Bed Fusion

et al. 2018

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This experimental work is aimed at studying the effect of microstructural modifications induced by post-processing heat treatments on the corrosion behavior of silicon-aluminum alloys produced by means of laser powder bed fusion (LPBF). The manufacturing technique leads to microstructures characterized by the presence of melt pools, which are quite different compared to casting alloys. In this study, the behavior of an AlSi10Mg alloy was evaluated by means of intergranular corrosion tests according to ISO 11846 standard on heat-treated samples ranging from 200 to 500 °C as well as on untreated samples. We found that temperatures above 200 °C reduced microhardness of the alloy, and different corrosion morphologies occurred due to the modification of both size and distribution of silicon precipitates. Selective penetrating attacks occurred at melt pool borders. The intergranular corrosion phenomena were less intense for as-produced specimens without heat treatments compared to the heat-treated specimens at 200 and 300 °C. General corrosion morphologies were noticed for specimens heat treated at temperatures exceeding 400 °C.

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Section: Resultsmentioning

confidence: 99%

Corrosion Behavior of Heat-Treated AlSi10Mg Manufactured by Laser Powder Bed Fusion

et al. 2018

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“…[86][87][88] It is well-recognised that silicon is cathodic with respect to the aluminium matrix, which may lead to the formation of micro-galvanic couples, resulting in localised corrosion phenomena. 89,90 Meanwhile, the corrosion rate of Al-Si alloys was verified to increase with increasing silicon content in a 0.5 M NaCl solution at 25°C. 91 Thus, this unique microstructure caused a selective attack to occur along a preferential path at the MPBs for the SLMed AlSi10Mg alloy as displayed in Fig.…”

Section: Molten Pool Boundaries (Mpbs)mentioning

confidence: 96%

Corrosion of metallic materials fabricated by selective laser melting

Kong

2019

npj Mater Degrad

181

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Additive manufacturing is an emerging technology that challenges traditional manufacturing methods. However, the corrosion behaviour of additively manufactured parts must be considered if additive techniques are to find widespread application. In this paper, we review relationships between the unique microstructures and the corresponding corrosion behaviour of several metallic alloys fabricated by selective laser melting, one of the most popular powder-bed additive technologies for metals and alloys. Common issues related to corrosion in selective laser melted parts, such as pores, molten pool boundaries, surface roughness and anisotropy, are discussed. Widely printed alloys, including Ti-based, Al-based and Fe-based alloys, are selected to illustrate these relationships, and the corrosion properties of alloys produced by selective laser melting are summarised and compared to their conventionally processed counterparts.

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“…Liang et al [29] studied the corrosion resistance and high strength of an Al-Si-based casting alloy. Because Al-Si-based casting alloys exhibit good castability, great strength-to-weight ratio, and reduced manufacturing costs, they have a variety of applications in the automotive industries.…”

Section: Overview On Application and Improved Properties Of Laserdepomentioning

confidence: 99%

The Effects of Rapid Cooling on the Improved Surface Properties of Aluminium Based Coatings by Direct Laser Deposition

Fatoba¹,

Makhatha²,

Akinlabi³

2017

Aluminium Alloys - Recent Trends in Processing, Characterization, Mechanical Behavior and Applications

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The deterioration of materials during industrial application poses a serious threat to the materials structural integrity. A material's susceptibility to wear and surface damage can be reduced by alteration of its surface chemistry, morphology and crystal structure. Therefore, modification of surface properties plays an important role in optimizing a material's performance for a given application. Modern industrial applications require materials with special surface properties such as high hardness, wear and corrosion resistance, therefore materials engineers are vital to regularly examine how the microstructure of a material can be altered. Aluminium-based alloys have a wide application in the automotive, domestic and aerospace industries due to their excellent mechanical properties such as good weldability, sound castability and outstanding resistance to corrosion. The purpose of this research is to enhance inherent properties of the materials to create new products or improve on existing ones. The most effective engineering solution to prevent or minimize such surface region of a component is done by fibre lasers. It was concluded that Hypereutectic Al-Si alloys having transition metals are exceptional materials due to their specific properties. The addition of Cu, Fe, Cr, Si, Mg and Ni to Al-based alloys can improve the mechanical properties at both ambient and elevated temperatures.

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A new high-strength and corrosion-resistant Al–Si based casting alloy

Cited by 50 publications

References 12 publications

Corrosion Behavior of Heat-Treated AlSi10Mg Manufactured by Laser Powder Bed Fusion

Corrosion Behavior of Heat-Treated AlSi10Mg Manufactured by Laser Powder Bed Fusion

Corrosion of metallic materials fabricated by selective laser melting

The Effects of Rapid Cooling on the Improved Surface Properties of Aluminium Based Coatings by Direct Laser Deposition

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