Cooling Rate, Hardness and Microstructure of Aluminum Cast Alloys

Akhyar, Akhyar; Farhan, Ahmad

doi:10.18063/msmr.v2i1.354

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…Thus, the motion of dislocation becomes easier and the hardness of the system decreases. Another possible reason is that the low zinc content alloys solidify at higher temperatures making it difficult to increase hardness by grain refinement [14][15].…”

Section: Hardnessmentioning

confidence: 99%

Effect of Zn content on microstructure and properties of hypoeutectic and near-eutectic Al-Si alloys

Dhakar

Kumar

Manani

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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In this research, the microstructure and mechanical properties of permanent mould cast Al-Si (7 wt.% and 12 wt.%) alloys without and with different amounts of Zn (1 wt.%, 2 wt.% and 4 wt.%) were analysed. The Al-xSi-yZn alloys have been prepared through a stir casting process using an Al-15 wt.% Si master alloy at 800 °C. Optical microscopic analyses have revealed variation in the α-Al matrix and Si needles in the alloy with the variation in Zn content. The mechanical properties analysis has shown that the hardness, tensile strength and wear resistance of the alloys increase with the addition of Si but decrease with the addition of Zn, within the limit of the alloying additions of the present research.

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Section: Hardnessmentioning

confidence: 99%

Effect of Zn content on microstructure and properties of hypoeutectic and near-eutectic Al-Si alloys

Dhakar

Kumar

Manani

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…It is shown in studies that increase in solidification time decreases the hardness [4]. Higher freezing range attribute to lower hardness through cooling rate plays a vital role to determine the microstructure which eventually affects mechanical behaviour of any alloy [5].…”

Section: Introductionmentioning

confidence: 99%

Computer-Aided Analysis of Solidification Time and its Effect on Hardness for Aluminium Copper Alloy

Tripathy

Sutradhar

2021

Lecture Notes in Mechanical Engineering

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Aluminium alloys are known for their very good strength to weight ratio. Aluminium alloy finds its applications depending upon the alloying agent/agents added. Among other alloying materials Copper, Silicon, Magnesium are some of the alloying agents which are largely used with Aluminium, as they improve the strength of the alloy without affecting the density when compared to pure Aluminium. Addition of Silicon to pure Aluminium improves the strength of the resulting alloy at room temperature. But at higher temperatures (above 150°C) strength of Aluminium-Silicon (Al-Si) alloy is very poor. It is a preferred alloying agent when it comes to casting as the Al-Si alloy shows good casting ability compared to other (alloy without having silicon). But in the present study Copper is used with Aluminium as the major alloying material and silicon is either absent or present only as impurity.Copper addition to the Aluminium improves the alloy strength at room as well as at high temperatures, but at the cost of quality of the cast component. To get good quality, defect-free castings and to improve yield 'casting simulation software' can be used which can predict the casting defects virtually. So in the present study effect of adding Copper in the absence of silicon is studied where casting simulation software helped to predict the solidification time and quality of final cast component. Prediction of solidification time for different compositions of alloy gives an idea about the hardness of the alloy. Simulation results from two types of sand castings (spiral shape, step) are compared for their solidification time. The variation in solidification time with variation of copper weight percentage which is 4, 8, 12% for this experiment is studied. It was found that for a fixed composition the solidification results from both types of sand casting (spiral shape and five-step component) are of similar nature. The shop floor casting of the five step component is done and Rockwall hardness for all three compositions tested. Prediction of solidification time and shrinkage defects results obtained through virtual casting process helps in improving

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Cooling Rate, Hardness and Microstructure of Aluminum Cast Alloys

Cited by 2 publications

References 7 publications

Effect of Zn content on microstructure and properties of hypoeutectic and near-eutectic Al-Si alloys

Effect of Zn content on microstructure and properties of hypoeutectic and near-eutectic Al-Si alloys

Computer-Aided Analysis of Solidification Time and its Effect on Hardness for Aluminium Copper Alloy

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