Hot tear characterization of AlCu5MgTi and AlSi9 casting alloys using an instrumented constrained six rods casting method

Hamadellah, Abderrazzak; Bouayad, Aboubakr; Gerometta, C.

doi:10.1016/j.jmatprotec.2017.01.030

Cited by 22 publications

(5 citation statements)

References 17 publications

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“…repaired easily by feeding the molten metal before the coalescence point. However, after the coalescence point, the flow of liquid metal between dendrites becomes so difficult, it is almost impossible to flow to the final solidification region, and any cracks formed during this solidification stage may be retained in the casting [33]. The dendrite morphology which was infected by the cooling function of the inner surface of the casting mold is shown in Figure 9.…”

Section: Hot Tearing Test Resultsmentioning

confidence: 99%

Hot Tearing of 9Cr3Co3W Heat-Resistant Steel during Solidification

Zhong

Wang

et al. 2018

Metals

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The linear contraction and hot tearing behavior of 9Cr3Co3W heat-resistant steel during solidification were studied by combining in-situ casting experiments and the corresponding numerical simulations. The linear contraction, stress and temperature of the samples were detected during solidification. The results show that the linear contraction of 9Cr3Co3W heat-resistant steel was 1.7% in the sand mold. Meanwhile, the critical temperature and stress of the hot tearing that occurred at the hot spot were 1304 °C and 0.72 MPa, respectively. The occurrence of hot tearing was observed at the tip of secondary dendrites along the primary dendritic arms, where the solute elements were significantly enriched at the final solidification.

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Section: Hot Tearing Test Resultsmentioning

confidence: 99%

Hot Tearing of 9Cr3Co3W Heat-Resistant Steel during Solidification

Zhong

Wang

et al. 2018

Metals

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“…Hot tearing, often referred to as hot cracking, occurs when a macrocrack forms during the solidification process [2]. Tear initiation occurs at temperatures near the solidus at locations of the lowest strength [3]. Such locations are primarily the grain boundaries, so the emerging flaw also runs along these boundaries, i.e., intercrystalline [4,5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ti Addition on the Hot-Tearing Susceptibility of the AlSi5Cu2Mg Alloy

Matejka,

Bolibruchová,

Sýkorová

2024

Metals

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The aluminum alloy AlSi5Cu2Mg finds application in the production of high-stress cylinder head castings. The AlSi5Cu2Mg alloy is specific for its high susceptibility to hot tearing. One effective way to reduce the susceptibility of Al-Si-Cu-Mg alloys to hot tearing is by grain refining. The AlSi5Cu2Mg alloy is designed with a specific chemical composition that significantly limits the Ti content to a maximum of 0.03 wt.%. This limitation practically limits the use of standard Al-Ti-B-based refiners. The present work focuses on the investigation of the influence of graded Ti addition on the susceptibility of the AlSi5Cu2Mg alloy to hot tearing. The Ti addition was deliberately chosen beyond the manufacturer’s recommendation (0.1, 0.2, 0.3 wt.%). The solidification process of the experimental alloys with Ti addition was evaluated in this research. On the basis of the thermal analysis, it was shown that due to the addition of Ti, the solidification interval of the AlSi5Cu2Mg alloy increases. An increase in the solidification interval is often associated with an increase in the susceptibility to tearing. The susceptibility of the experimental alloys to hot tearing was evaluated qualitatively and quantitatively. Based on the quantitative and qualitative evaluation, it was shown that the addition of Ti reduces the susceptibility of the AlSi5Cu2Mg alloy to hot tearing. A positive refining effect of Ti on the primary α-(Al) phase was demonstrated by microstructural evaluation. Based on this research, it was shown that despite the increase in the solidification interval due to the addition of Ti, the susceptibility of the aluminum alloy to the formation of hot tears is reduced due to the better filling of the material in the interdendritic spaces.

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“…Solid particles can move by the lubricating effects of the liquid films between them, but with restrictions [7]. Shrinkage porosity defects, macro-segregation and hot cracks can appear [8,9]. Therefore, the study of solidification parameters in the zone between DCP and RP combined with SF is crucial to calculate solidification parameters and alloy compositions to reduce casting defects and to employ in casting simulators [10].…”

Section: Introductionmentioning

confidence: 99%

Solid Fraction Determination at the Rigidity Point by Advanced Thermal Analysis

et al. 2021

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The aim of this work is to determine the Solid Fraction (SF) at the rigidity point (FRP) by applying advanced thermal analysis techniques. The variation of the FRP value is important to explain the solidification behavior and the presence or absence of defects in aluminum alloys. As the final alloy composition plays a key role on obtained properties, the influence of major and minor alloying elements on FRP has been studied. A Taguchi design of experiments and a previously developed calculating method, based on the application of high rank derivatives has been employed to determinate first the rigidity point temperature (RPT) and after the corresponding FRP for AlSi10Mg alloys. A correlation factor of r2 of 0.81 was obtained for FRP calculation formula in function of the alloy composition.

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Hot tear characterization of AlCu5MgTi and AlSi9 casting alloys using an instrumented constrained six rods casting method

Cited by 22 publications

References 17 publications

Hot Tearing of 9Cr3Co3W Heat-Resistant Steel during Solidification

Hot Tearing of 9Cr3Co3W Heat-Resistant Steel during Solidification

Effect of Ti Addition on the Hot-Tearing Susceptibility of the AlSi5Cu2Mg Alloy

Solid Fraction Determination at the Rigidity Point by Advanced Thermal Analysis

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