Research on the Effect of Pouring Temperature on Hot-Tear Susceptibility of A206 Alloy by Simulation

Nasresfahani, Mohamad Reza; Rajabloo, Mohamad Javad

doi:10.1007/s11663-014-0100-5

Cited by 15 publications

(2 citation statements)

References 16 publications

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“…Istrumen Costrained T-Shaped Casting (ICTC) aparatus, This method was developed to analyse hot tearing, by eliminating the effect of constraints through the mould causing tensile and strain in the specimen [20,70,71]. The mould geometry was also designed to ensure that the cast metal specimen was free from contraction during solidification.…”

Section: Mould Type For Hot Tearing Observationmentioning

confidence: 99%

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: Mould Type For Hot Tearing Observationmentioning

confidence: 99%

Archives of Foundry Engineering

2022

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“…In general, alloys with such a structure are more susceptible to hot tearing than alloys with irregular grains. Some research has confirmed that the effect of casting temperature varies depending on the hot tearing detection method applied [ 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Returnable Material in Batch on Hot Tearing Tendency of AlSi9Cu3 Alloy

et al. 2021

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The main reason for the use of returnable material, or recycled alloys, is a cost reduction while maintaining the final properties of the casting. The casting resulting quality is directly related to the correct ratio of commercial grade alloy and alloy made by remelting the returnable material in the batch. The casting quality is also affected by the purity of the secondary raw materials used, the shape complexity and the use of the casting itself. The presented article focuses on the effect of increasing the returnable material content in the batch on the hot tearing susceptibility of AlSi9Cu3 alloy. Hot tears are a complex phenomenon that combines metallurgical and thermo-mechanical interactions of the cast metal. Hot tearing susceptibility was evaluated on the basis of quantitative (HTS—hot tearing susceptibility index) and qualitative evaluation. The negative effect of returnable material in the batch was already manifested at a 20% content in the batch. The critical proportion of the returnable alloy in the batch can be stated as 50%. The alloy with a 50% returnable material content manifested insufficient results of the HTS index and qualitative evaluation, which means increased sensitivity to tearing. The negative effect of returnable material and the increased sensitivity were also confirmed in the evaluation of the fracture surface and hot tear profile. The microstructure of alloys with 50% and higher proportion of returnable material was characterized by a higher amount of iron phases (mainly Al5FeSi), whose sharp ends acted as critical regions of hot tearing and subsequent hot tear propagation, which had a major impact on the increase in hot tearing susceptibility.

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Investigation on the Effect of Cooling Rate on Hot Tearing Susceptibility of Al2024 Alloy Using Thermal Analysis

Shabestari

Ghoncheh

2015

Metall Mater Trans B

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Research on the Effect of Pouring Temperature on Hot-Tear Susceptibility of A206 Alloy by Simulation

Cited by 15 publications

References 16 publications

Archives of Foundry Engineering

Archives of Foundry Engineering

Effect of Returnable Material in Batch on Hot Tearing Tendency of AlSi9Cu3 Alloy

Investigation on the Effect of Cooling Rate on Hot Tearing Susceptibility of Al2024 Alloy Using Thermal Analysis

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