Influence of mould vibration on microstructural behaviour and mechanical properties of LM25 aluminium alloy using gravity die casting process

Varun, S.; Chavan, Tataram K.

doi:10.1016/j.matpr.2020.09.671

Cited by 4 publications

(6 citation statements)

References 3 publications

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“…Varun et al found the intensity of vibration causes inner casting defects to decrease to help in increasing the mechanical properties. 14…”

Section: Resultsmentioning

confidence: 99%

“…Varun et al found the intensity of vibration causes inner casting defects to decrease to help in increasing the mechanical properties. 14 Effect of the change in the frequency on the HV of A308 alloy. The findings of HV tests conducted in both stationary and vibratory situations are provided in Table 5.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…The A308 aluminium alloy was chosen due to its extensive use in structural components for the automotive and aerospace industries having excellent castability, machinability and proof strength. 14…”

Section: Introductionmentioning

confidence: 99%

“…12 On the contrary, the mechanical mould vibration treatment offers a simple, practical, economical and eco-friendly approach towards grain refinement. 13,14 Therefore, it can suit industrial requirements more suitably than any other physical treatment. In 1878, Chernov was probably the first one to introduce reciprocal rocking action during the steel solidification.…”

Section: Introductionmentioning

confidence: 99%

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Influence of high-intensity horizontal mould vibration on the density, grain refinement and mechanical characteristics of a die cast aluminium alloy (LM21)

Yadav

Kumar

Tewari

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The present investigation analysed the effect of mould vibration using an indigenous vibrating setup on the physical, metallurgical and mechanical properties of die cast A308 alloy. The alloy was vibrated at a constant amplitude of 31µm at 75, 100, 125 and 150 Hz. The work aims to generate more nucleation sites during melt solidification by fragmenting dendrites and Si particles. To examine the changes in metallurgical characteristics, α-Al, secondary dendritic arm spacing, length, width and aspect ratio of eutectic Si particles were studied using optical microscopy, scanning electron microscopy and X-ray diffraction analysis. It was observed that the size of α-Al, secondary dendritic arm spacing, length, width and aspect ratio of eutectic Si particles were decreased by 47%, 53%, 65%, 12% and 61%, respectively. Whereas, the shape factor and density of the alloy were enhanced by 25% and 1.62% compared to stationary cast samples because of mechanical vibration treatment at an optimum frequency of 100 Hz. Mechanical testing findings demonstrated a 13%, 20%, 15% and 20% increase in the parameters such as yield strength, ultimate tensile strength, percentage elongation and microhardness at 100 Hz when compared to the stationary cast sample. Grain refinement, uniformity of structure, improvement in the morphology of metallurgical characteristics, decreased porosities and subsequent increase in density were all factors that contributed to the improvement. Tensile test samples with scanning electron microscopy fractography demonstrated transgranular brittle fracture and a few ductile rips.

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“…Varun et al found the intensity of vibration causes inner casting defects to decrease to help in increasing the mechanical properties. 14…”

Section: Resultsmentioning

confidence: 99%

Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of high-intensity horizontal mould vibration on the density, grain refinement and mechanical characteristics of a die cast aluminium alloy (LM21)

Yadav

Kumar

Tewari

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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show abstract

“…The mechanical vibration has shown the prominent ability to refine crystal grains, [1,2] reduce segregation, [3] and decrease porosities, [4] hence effecting mechanical properties of castings. [5,6] In addition, the mechanical vibration, generated by centrifugal motors, electromagnets, air hammers, etc., is a relatively simple technique without requiring complex procedures. It can be applied for the current existing DOI: 10.1002/adts.202200646 processes and does not require extensive modifications on the design of the equipment used.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Wave Propagation in Solidifying Metals: Physico‐Mathematical Model and Numerical Tests

Chen

Wang

2023

Advcd Theory and Sims

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Despite the widespread application of mechanical waves in solidifying metals, the wave propagation laws in melt and the motion patterns of melts are unclear, which has seriously hindered the development of vibration solidification treatment. It is difficult to solve the wave propagation because of the spatial heterogeneity and the intrinsic viscoelasticity of solidifying metals. In this paper, a physico-mathematical model is developed by coupling the unsteady temperature field and the integral Hooke-Kelvin model unifying various rheological models during solidification, and simplifies to wave equations by introducing memory factors. Then, the wave equations are solved by a staggered-grid high-order difference method. Subsequently, the propagation laws of mechanical waves in a large casting and a feeding channel during solidification are analyzed, eventually verified by casting experiments. It is shown that the viscoelasticity of solidifying metals is significant for the wave field. In the large casting, both displacements and stresses exhibit complex multi-lobe patterns. In the feeding channel, the formation of micropores between the quasi-liquid and the quasi-solid phase and the feeding improvement by vibrations are well explained by simulation. The numerical model is a novel reliable method to theorize the solidification under vibration and expands the potential applications of vibration.

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Impact of metal mould vibration on the mechanical properties of aluminium 6082 t6 alloy

Bobba

Babu²,

Rao

2023

Advances in Materials and Processing Technologies

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Influence of mould vibration on microstructural behaviour and mechanical properties of LM25 aluminium alloy using gravity die casting process

Cited by 4 publications

References 3 publications

Influence of high-intensity horizontal mould vibration on the density, grain refinement and mechanical characteristics of a die cast aluminium alloy (LM21)

Influence of high-intensity horizontal mould vibration on the density, grain refinement and mechanical characteristics of a die cast aluminium alloy (LM21)

Mechanical Wave Propagation in Solidifying Metals: Physico‐Mathematical Model and Numerical Tests

Impact of metal mould vibration on the mechanical properties of aluminium 6082 t6 alloy

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