Study on hardness and microstructural characteristics of sand cast Al-Si-Cu alloys

Zeren, Muzaffer; Karakulak, Erdem

doi:10.1007/s12034-009-0095-8

Cited by 9 publications

(7 citation statements)

References 7 publications

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“…The alloys mechanical properties rely on the size, shape, as well as the distribution of the eutectic silicon, ɑ-Al grains/dendrites, and the presence of alloying element in case of Al-Si alloys. This agrees with the results of ZerenandKarakulak [7]. The elongation results for all samples of aluminium-silicon alloys increased which explains the increased deposition hardening caused by the increase of silicon content in the aluminium alloys.…”

Section: Resultssupporting

confidence: 92%

“…This increase was due to copper and silicon. The reason behind the increment of the hardness is linked with the creation of intermetallic compound phase Al2Cu [7].…”

Section: Resultsmentioning

confidence: 99%

“…ZerenandKarakulak et al [7] have studied the impact of copper contents on the microstructural and hardness characteristics of sand cast Al-Si-Cu alloys. Al-Si alloys with 2% and 5% Cu have been used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Copper on Tensile and Hardness of Al-Si Alloy in Automotive Application

Mohmmed

Noory

2022

IJP

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In current research Copper was employed for preparing a ternary system of Al–Si alloy in different (0.2–2.5 wt. %) the best was taken is (1.5%wt) of copper that circumstances of solidification for improving the mechanical performance of the available in aluminium alloy. Cast iron molds were prepared to obtain tensile strength testing specimens. Alloys were prepared by employing gas furnaces. The molten metal was poured into a preheated cast-iron mold. The obtained alloy structures were studied using an X-ray diffractometer and optical microscopy. The mechanical performance of the prepared alloys was examined under the influence of different hardening conditions in both heat and non-heat-treated conditions. The outcomes showed at the ideal input status of friction stir processing, the cast alloy microstructure was enhanced in terms of refinement of eutectic and primary Si particles, homogeneous dispersion of Si, and the reduction in porosity. The mineral compounds formed during the hardening process were examined using an optical microscope. The highest maximum tensile strength (UTS) was 120 MPa for sample Al-22.5Si, and 147 MPa for sample Al-21Si-1.5Cu, while the highest hardness was 77 HB for sample Al-22.5Si, and 90 HB for sample Al-21Si-1.5Cu.

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Section: Resultssupporting

confidence: 92%

“…This increase was due to copper and silicon. The reason behind the increment of the hardness is linked with the creation of intermetallic compound phase Al2Cu [7].…”

Section: Resultsmentioning

confidence: 99%

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Effect of Copper on Tensile and Hardness of Al-Si Alloy in Automotive Application

Mohmmed

Noory

2022

IJP

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“…Owing to excellent castability, good specific strength, low coefficient of thermal expansion as well as good wear resistance, Al-based alloys of the ANSI series 319.1 and 333.1 (in which compositions lie mostly within the ranges 5.5-10%Si and 3-4%Cu) have a wide range of applications in automotive and aeronautics industries such as manufacture of cylinder heads, pistons and engine blocks [1][2][3][4]. Al-7Si-Mg cast alloys (typically A356 and A357 alloys) are equally extensively applied in both aerospace and automotive industries due to their excellent formability, high corrosion resistance, and good comprehensive mechanical properties [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and microhardness in horizontally solidified Al–7Si–0.15Fe–(3Cu; 0.3Mg) alloys

Souza

Lima

Rizziolli

et al. 2018

Materials Science and Technology

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Transient horizontal directional solidification (THDS) experiments have been carried out with Al–7wt.%Si–0.15Fe, Al–7wt.%Si–3wt.%Cu–0.15wt.%Fe and Al–7wt.%Si–0.3wt.%Mg–0.15wt.%Fe alloys, to identify experimental relationships between growth rates ( GR), cooling rates ( CR), tertiary dendrite arm spacings (λ3) and microhardness (HV). Optical microscopy and scanning electron microscopy/energy-dispersive spectrometry (SEM/EDS) were used to perform a comprehensive microstructural characterisation of the β-Al5FeSi, ω-Al7Cu2Fe, θ-Al2Cu, π-Al8Mg3FeSi6 and α-Mg2Si intermetallic phases. The addition of Cu and Mg to the Al–7wt.%Si–0.15wt.%Fe alloy led to the precipitation of ω and π phases from the β phase. It has been found for all analysed alloys that power experimental functions given by λ3 = constant.( GR)-1.1 and λ3 = constant.( CR)-0.55 best describe the variation of λ3 with corresponding thermal and microstructural parameters.

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“…The strengthening contribution from precipitation is typically a function of both precipitate size and fraction. As the Cu content increases, there is a continuous increase in hardness, but strength and especially ductility depend on how the Cu is distributed [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Consequences of Inappropriate Temperatures of the Solution Heat Treatment in Al-Si-Cu Cast Alloys

Kuchariková

Tillová

Švecová

2020

DDF

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Al-Si-Cu alloy systems have a great importance in the casting industry due to their excellent castability, good mechanical properties and wear resistance. Addition of alloying elements, such as Mg and Cu, makes these alloys heat treatable. Improving of their mechanical properties allows their using in new, more demanding applications (e.g. engines, cylinder heads etc.). The most applied heat treatment for this alloy is a T6 (age hardening). Such a heat treatment is required for precipitation of the Al2Cu hardening dispersed phase that increases the mechanical properties of Al alloys. Therefore, the consequences of different solution heat treatment temperatures 505, 515 and 525 °C for AlSi9Cu3 and 515, 525 and 545 °C for AlSi12Cu1Fe cast alloys, with holding times 2, 4, 8, 16 and 32 hours, were investigated in this study. The effect of solution treatment was evaluated based on changes in microstructure (optical microscopy) and mechanical properties (hardness, impact energy and ultimate tensile strength). The study confirms the strengthening of the experimental alloys caused by application of optimum conditions of T6 and melting of the Cu-rich phases with application of inappropriate solution temperature, as well as distortion and changes of the testing bars.

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Study on hardness and microstructural characteristics of sand cast Al-Si-Cu alloys

Cited by 9 publications

References 7 publications

Effect of Copper on Tensile and Hardness of Al-Si Alloy in Automotive Application

Effect of Copper on Tensile and Hardness of Al-Si Alloy in Automotive Application

Microstructure and microhardness in horizontally solidified Al–7Si–0.15Fe–(3Cu; 0.3Mg) alloys

Consequences of Inappropriate Temperatures of the Solution Heat Treatment in Al-Si-Cu Cast Alloys

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