Effects of sonoprocessing on microstructure and mechanical properties of A390 aluminium alloy

Youn, Jeong Il; Kang, Bok-Hyun; Ko, Dae Gyun; Kim, Y. J.

doi:10.1179/136404608x361828

Cited by 10 publications

(9 citation statements)

References 5 publications

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“…In the case of combining two applications the maximum value of the tensile strength is obtained. Similar results were previously reported that ultrasonic vibration caused an increase of the tensile strength of A390 [9], near-eutectic Al-Si [14], AlSi9Cu3 [19], Mg-8Li-3Al [24], AA7075 [28] alloys.…”

Section: Mechanical Propertiessupporting

confidence: 91%

Improving mechanical properties of AlSi10Mg aluminum alloy using ultrasonic melt treatment combined with T6 heat treatment

Vatansever¹,

Ertürk²,

Karabay³

2020

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The purpose of this study is examining the effects of ultrasonic melt treatment on microstructure and mechanical properties of the AlSi10Mg alloy. In this study, ultrasonic melt treatment with different frequencies and duration was applied to AlSi10Mg molten alloy. Also, T6 heat treatment was applied to samples which were obtained by ultrasonic melt treatment (UST) with different application parameters to investigate the combination of T6 heat treatment and UST effect on the microstructure and mechanical properties. The microstructure of cast samples was characterized by optical and scanning electron microscopy. Also, hardness and tensile tests were carried out. The results indicate that primary α-Al phases are transformed from coarse dendrites to smaller dendrites by the ultrasonic melt treatment. Besides, secondary dendrite arm spacing of the alloy decreased and mechanical properties such as hardness and tensile strength increased. UST reduces the secondary dendrite arm spacing (SDAS) of the aluminum alloy to 50 %. Additionally, increasing treatment time contributes to hardness up to 12 % and tensile strength up to 50 %.

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Section: Mechanical Propertiessupporting

confidence: 91%

Improving mechanical properties of AlSi10Mg aluminum alloy using ultrasonic melt treatment combined with T6 heat treatment

Vatansever¹,

Ertürk²,

Karabay³

2020

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“…The light improvement of hardness in UST samples can be related to the finer grains induced by the treatment [ 39 ]. The smaller standard deviation in both grain size and hardness measurements can be due to the homogenizing effect of the ultrasound itself, which also promotes a more uniform microstructure and solute distribution, as already demonstrated by the authors elsewhere [ 38 , 42 ] as well as being known from literature [ 39 , 49 , 50 , 51 ].…”

Section: Resultsmentioning

confidence: 60%

Influence of Ultrasound Treatment on Cavitation Erosion Resistance of AlSi7 Alloy

Pola¹,

Montesano²,

Tocci³

et al. 2017

Materials

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Ultrasound treatment of liquid aluminum alloys is known to improve mechanical properties of castings. Aluminum foundry alloys are frequently used for production of parts that undergo severe cavitation erosion phenomena during service. In this paper, the effect of the ultrasound treatment on cavitation erosion resistance of AlSi7 alloy was assessed and compared to that of conventionally cast samples. Cavitation erosion tests were performed according to ASTM G32 standard on as-cast and heat treated castings. The response of the alloy in each condition was investigated by measuring the mass loss as a function of cavitation time and by analyzing the damaged surfaces by means of optical and scanning electron microscope. It was pointed out that the ultrasound treatment increases the cavitation erosion resistance of the alloy, as a consequence of the higher chemical and microstructural homogeneity, the finer grains and primary particles and the refined structure of the eutectic induced by the treatment itself.

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“…There are numerous attempts to improve tool wear by reducing the primary silicon crystal size. Youn et al [5] and Feng et al [6] reported the use of ultrasound vibration, electromagnetic stirring was applied by Lu et al [7], while Anuradee et al [8] applied electromagnetic vibration. Beside mechanical refinements, the addition of alloying elements, such as phosphorus may refine the primary silicon as well.…”

Section: Introductionmentioning

confidence: 99%

Tensile and fatigue properties, machinability and machined surface roughness of Al-Si-Cu alloys

et al. 2019

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In this paper, the aim was to determine if ASC91 (9 % Al, 1 % Cu) could be replaced with ASC73 (7 % Al, 3 % Cu) aluminium alloy, with presumably improved machinability due to lower silicon content (9 to 7 %) and retained mechanical properties due to a higher copper content (1 to 3 %). The test samples were excised from cylinder heads produced by the lost-foam casting technique in industrial conditions. The tensile properties (proof strength, ultimate tensile strength, elongation and modulus of elasticity), fatigue performance, microstructure and machinability of two as-cast aluminium alloys were examined. The results of the fatigue tests were statistically analyzed using the staircase method described in the UNI 3964 standard. Tensile properties of the ASC91 were higher, while fatigue properties were higher in the ASC73 alloy. The resultant force was lower for the ASC73, while roughness was lower for the ASC73 alloy, if the feed per tooth is higher than 0.21 mm/t. Two main factors that influence such behaviour are the amount of eutectic silicon and the α-solid solution adhesion to the cutting tool.

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Effects of sonoprocessing on microstructure and mechanical properties of A390 aluminium alloy

Cited by 10 publications

References 5 publications

Improving mechanical properties of AlSi10Mg aluminum alloy using ultrasonic melt treatment combined with T6 heat treatment

Improving mechanical properties of AlSi10Mg aluminum alloy using ultrasonic melt treatment combined with T6 heat treatment

Influence of Ultrasound Treatment on Cavitation Erosion Resistance of AlSi7 Alloy

Tensile and fatigue properties, machinability and machined surface roughness of Al-Si-Cu alloys

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