Effect of Alloying Elements (Magnesium and Copper) on Hot Cracking Susceptibility of AlSi<sub>7</sub>MgCu Alloys

Bozorgi, Salar; Haberl, Katharina; Kneißl, Christian; Pabel, Thomas; Schumacher, Peter

doi:10.1002/9781118062050.ch14

Cited by 9 publications

(9 citation statements)

References 7 publications

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“…The hot tearing susceptibility category of the bycatch value was determined as follows [21,42]: < 0.5 = no hot tearing susceptibility, 0,5 -1.25 = small tearing susceptibility, 1.25 -2.25 = moderate tearing susceptibility, 2.25 -3.5 = high hot tearing susceptibility, > 3.5 = very high hot tearing susceptibility.…”

Section: Tearing Types Wf Valuementioning

confidence: 99%

“…Fig. 25 shows a model used with a combination of several "dog-bone" rod lengths, which were applied to both metal and sand castings [42]. Fig.…”

Section: Mould Type For Hot Tearing Observationmentioning

confidence: 99%

“…25. The HCI method sample model [42] The Test Developed in the Laboratory of Foundry Moulds Technology of the Faculty of Foundry Engineering, According to the Laboratory of Foundry Moulds Technology (Faculty of Foundry Engineering), continuous stress measurements were carried out during the solidification of the sand mould, which was used to determine the cooling and inhibited shrinkage rates in the casting product (Fig. 26).…”

Section: Mould Type For Hot Tearing Observationmentioning

confidence: 99%

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Archives of Foundry Engineering

2022

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Hot tearing is a casting defect responsible for external and internal cracks on casting products. This irregular undesired formation is often observed during solidification and freezing. The solidification of molten metal also causes thermal contraction and shrinkage, indicating the occurrence of hot tearing when the alloy is restrained by the mould design. The parameters affecting this process include the pouring and mould temperatures, the chemical composition of the alloy, and the mould shape. Also, the factors affecting hot tearing susceptibility include pouring and mould temperatures, the grain refiner, as well as pouring speed. There are many methods of measuring the level of susceptibility to hot tearing, one of which is the thermal contraction evaluation during metal solidification, observed in cast products through several mould types. This paper discusses the hot tearing overview, the effect of pouring temperature, mould temperature, grain refiner, pouring speed on hot tearing, the type of mould, and criterion for hot tear observation.

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Section: Tearing Types Wf Valuementioning

confidence: 99%

“…Fig. 25 shows a model used with a combination of several "dog-bone" rod lengths, which were applied to both metal and sand castings [42]. Fig.…”

Section: Mould Type For Hot Tearing Observationmentioning

confidence: 99%

Section: Mould Type For Hot Tearing Observationmentioning

confidence: 99%

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Archives of Foundry Engineering

2022

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“…Current Al alloys use Cu to increase strength by hardening [ 8 ]. Commercially used hardenable Al-Si alloys are being replaced by new types of Al alloys that use either a system other than Al-Si (e.g., AlCu7MnZr) or are modified by alloying existing Al-Si alloys with selected elements (e.g., AlSi7MgCu0.5, AlSi8Cu3, or AlSi10Mg0.3Cu) [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Study of the Influence of Zirconium, Titanium and Strontium on the Properties and Microstructure of AlSi7Mg0.3Cu0.5 Alloy

et al. 2022

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The aim of the paper is to describe and specify the properties and microstructure of Al-Si alloy using Zr, a combination of Zr with elements used in the grafting of Al (Ti) alloys, and modification (Sr). Al-Si alloys with a combination of Zr and Ti and Sr elements represent an opportunity for the development of new aluminum alloys with a specific use. The experiment focused on the analysis of the synergistic effects of Zr with Ti and Zr with Sr on a AlSi7Mg0.3Cu0.5 alloy. The experimental alloys contained a constant Zr content of 0.15 wt. % and were alloyed with a gradual addition of Ti and Sr in the range of 0.1 to 0.3 wt. % for Ti, and 0.1 to 0.3 wt. % for Sr. The experimental samples were cast by meltable model casting technology. In variants with a constant addition of Zr 0.15 wt. % and a gradual addition of Ti, we observed an increase in the values of mechanical characteristics, with a significant decrease in ductility. When evaluating the structure of experimental alloys, Ti affected it by increasing the number of precipitated Zr phases. Experimental alloys with Zr and Sr addition were characterized by nucleation of Zr phases in angular morphology. It can be concluded that the investigated elements are expected to have a positive (strengthening) effect even at higher operating temperatures.

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“…Al-Cu-Mg alloy is a typical casting material with high strength, toughness and good corrosion resistance, so it is widely applied in aerospace field. However, many studies [6][7][8] show that the Al-Cu-Mg alloys have high sensitivity of hot tearing because the severe shrinkage of the alloy occurs during solidification, which impairs the castability of this alloy. The high mechanical pressure during squeeze casting process can effectively feed the shrinkage porosity and decrease the number of the defects in castings.…”

Section: Introductionmentioning

confidence: 99%

Study on Microstructure Distribution of Al-Cu-Mg Alloy in Squeeze Casting Process

Zheng

Chen

et al. 2022

J. Phys.: Conf. Ser.

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The squeeze casting process is an advanced technology, which is suitable for a wide range of alloys including Al-Cu-Mg alloys. The high pressure in squeeze casting process both refines the microstructure and enhances the mechanical property of the alloys. The heat transfer and solidification process are complex with the chilling mould and pressure of machine punch. This results in the inhomogeneous microstructure and property in casting alloy. This study focuses on the distribution of microstructure, chemical composition, and hardness of Al-Cu-Mg alloy along the radial direction of casting. The composition and area fraction of eutectic phases are characterized. Moreover, the relationship between the microstructure and mechanical property was also analysed to show the characteristic of microstructure in squeeze casting process.

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Effect of Alloying Elements (Magnesium and Copper) on Hot Cracking Susceptibility of AlSi₇MgCu Alloys

Cited by 9 publications

References 7 publications

Archives of Foundry Engineering

Archives of Foundry Engineering

Study of the Influence of Zirconium, Titanium and Strontium on the Properties and Microstructure of AlSi7Mg0.3Cu0.5 Alloy

Study on Microstructure Distribution of Al-Cu-Mg Alloy in Squeeze Casting Process

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Effect of Alloying Elements (Magnesium and Copper) on Hot Cracking Susceptibility of AlSi7MgCu Alloys

Cited by 9 publications

References 7 publications

Archives of Foundry Engineering

Archives of Foundry Engineering

Study of the Influence of Zirconium, Titanium and Strontium on the Properties and Microstructure of AlSi7Mg0.3Cu0.5 Alloy

Study on Microstructure Distribution of Al-Cu-Mg Alloy in Squeeze Casting Process

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Product

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Effect of Alloying Elements (Magnesium and Copper) on Hot Cracking Susceptibility of AlSi₇MgCu Alloys