Melt superheating on the microstructure and mechanical properties of diecast Al-Mg-Si-Mn alloy

Yang, Wenchao; Yang, Xinliang; Ji, Shouxun

doi:10.1007/s12540-015-4215-2

Cited by 16 publications

(3 citation statements)

References 43 publications

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“…Mn reduces die soldering and corrects the Fe phase by transforming the β-Fe needles (FeSiAl 5 ) into the Chinese script-like morphology (α-Fe, (Fe, Mn) 3 Si 2 Al 15 ). Additionally, Mn provides good ejection behaviour [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Solution and Artificial Aging Treatments on the Microstructure and Mechanical Properties of Die-Cast Al–Si–Mg Alloys

Kang

Park

Choi

et al. 2021

Metals

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Heat treatment is widely used to improve the properties of Al–Si–Mg alloys and its outcomes are influenced by the parameters applied during the treatment. This study describes the effect of the solution and artificial aging treatments on the microstructure and mechanical properties of die-cast Al–Si–Mg alloys. The microstructure of the as-cast Al–Si–Mg alloy was mainly composed of α-Al, complex needle-type eutectic Si particles, Mg2Si, and α-AlFeMn. The complex needle-type eutectic Si particles disintegrated into spheroidal morphologies, while the Mg2Si was dissolved due to the solid solution treatment. The maximum yield strength (YS) and ultimate tensile strength (UTS) values were 126.06 and 245.90 MPa at 520 °C after 90 min of solution heat treatment, respectively. Although the YS and UTS values of the Al–Si–Mg alloys reduced due to the solution treatment, the elongation (EL) of the solid solution heat-treated Al–Si–Mg alloys was improved in comparison to that of the as-cast Al–Si–Mg alloy. The maximum YS and UTS of 239.50 and 290.93 MPa were obtained after performing artificial aging at 180 °C for 180 min, respectively. However, the EL of the aging heat-treated alloy was reduced by a minimal value.

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Section: Introductionmentioning

confidence: 99%

Influence of the Solution and Artificial Aging Treatments on the Microstructure and Mechanical Properties of Die-Cast Al–Si–Mg Alloys

Kang

Park

Choi

et al. 2021

Metals

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“…The setup cost of other thermal, physical, and mechanical processing techniques is relatively high, and chemical additions are less economical than melt superheating methods. 7 It has been reported that melting and casting at high superheat temperatures results in the dissolution of harmful heterogeneities and the formation of fine-grain microstructure in alloys. 5,[8][9][10] Wang et al 11 reported that an increase in undercooling with increase in superheat temperature results in the formation of equiaxed and nearly globular silicon crystals in Al-Si alloys.…”

Section: Introductionmentioning

confidence: 99%

X-ray Computed Tomography Studies on Porosity Distribution in Vacuum Induction Cast Al-7Si Alloys

Mathew

Williams

Srirangam

2021

JOM

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Porosity in aluminum alloys is a great concern to the casting and automotive industry. In this publication, porosity formation in air-melted and vacuum induction melted (VIM) aluminum alloys was studied and compared to understand its effect on microstructure and mechanical properties of Al-7Si alloys. Al-7Si alloys were cast at 700°C and 900°C in a muffle furnace and VIM furnace. Microstructural results show that the alloys cast in muffle furnace refined the eutectic silicon compared with the cast samples prepared in VIM furnace. X-ray computed tomography (XCT) was used for three-dimensional (3D) visualization and quantification of porosity in these alloys. The volume fraction of pores was observed to be higher in alloy air-melted at 900°C compared with 700°C. XCT results from VIM alloy samples showed no significant porosity when cast at either 700°C or 900°C. The morphology of large pores in alloys air-melted at 700°C represents the formation of shrinkage porosity due to the incomplete flow of molten metal during solidification. Tensile test results show that the elongation property of VIM alloy was increased by more than 20% compared with air-melted alloy. The tensile strength and elongation were observed to be higher for alloy samples cast at 700°C compared with 900°C for both air-melted and VIM alloys. The findings from microstructure, XCT, and tensile tests show that vacuum induction melting improves the mechanical properties of the alloy compared with air-melted alloy.

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“…At present, methods have been developed to control the formation of the structure and properties of aluminum alloys through the use of various physical methods for treating melts in the processes of melting and crystallization. For these purposes, tested methods such as temperature-speed and temperature-time processing [6][7][8][9], the effects of magnetic and electric fields [10][11][12], ultrasonic and vibration processing [13][14][15], and several others.…”

Section: Introductionmentioning

confidence: 99%

Archives of Foundry Engineering

Konovalov

Gromov

Zaguliyaev

et al. 2019

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By the method of modern physical material science (optic microscopy scanning and transmission electron microscopy) the analysis of structural phase states, the morphology of the second phase inclusions and defect substructure of Al-Si alloy (silumin) of hypoeutectic composition, subjected to electron beam processing was done with the following parameters: energy density 25-35 J/cm 2 , beam length 150 μs, pulse number -3, pulse repetition rate -0.3 Hz, pressure of residual gas (argon) 0.02 Pa. The surface irradiation results in the melting of the surface layer, the dissolution of boundary inclusions, the stricture formation of high speed cellular crystallization of submicron sizes, the repeated precipitation of the second phase nanodimentional particles. With the increased distance from the irradiation surface the layer containing the second phase inclusions of quasi-equilibrium shape along with the crystallization cells was revealed. It is indicative of the processes of Al-Si alloy structure globalization on electron beam processing.

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Melt superheating on the microstructure and mechanical properties of diecast Al-Mg-Si-Mn alloy

Cited by 16 publications

References 43 publications

Influence of the Solution and Artificial Aging Treatments on the Microstructure and Mechanical Properties of Die-Cast Al–Si–Mg Alloys

Influence of the Solution and Artificial Aging Treatments on the Microstructure and Mechanical Properties of Die-Cast Al–Si–Mg Alloys

X-ray Computed Tomography Studies on Porosity Distribution in Vacuum Induction Cast Al-7Si Alloys

Archives of Foundry Engineering

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