Study on activation energy and strain rate sensitivity of closed-cell aluminium hybrid composite foam

Yadav, B.N.; Muchhala, Dilip; Sriram, S.; Mondal, D.P.

doi:10.1016/j.jallcom.2020.154860

Cited by 17 publications

(5 citation statements)

References 49 publications

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“…Figure 2 shows the relationship between the activation energy and the strain rate. It was assumed that for the researched steel the dependence of the activation energy on the strain rate is logarithmic [22,23]. Finally, the following equation was used to describe the influence of the temperature and strain rate:…”

Section: Resultsmentioning

confidence: 99%

Shaping Microstructure and Mechanical Properties of High-Carbon Bainitic Steel in Hot-Rolling and Long-Term Low-Temperature Annealing

Dembiczak

Knapiński

2021

Materials

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Based on the research results, coefficients in constitutive equations, describing the kinetics of dynamic, meta-dynamic, and static recrystallization in high-carbon bainitic steel during hot deformation were determined. The developed mathematical model takes into account the dependence of the changing kinetics in the structural size of the preliminary austenite grains, the value of strain, strain rate, temperature, and time. Physical simulations were carried out on rectangular specimens. Compression tests with a flat state of deformation were carried out using a Gleeble 3800. Based on dilatometric studies, coefficients were determined in constitutive equations, describing the grain growth of the austenite of high-carbon bainite steel under isothermal annealing conditions. The aim of the research was to verify the developed mathematical models in semi-industrial conditions during the hot-rolling process of high-carbon bainite steel. Analysis of the semi-industrial studies of the hot-rolling and long-term annealing process confirmed the correctness of the predicted mathematical models describing the microstructure evolution.

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Section: Resultsmentioning

confidence: 99%

Shaping Microstructure and Mechanical Properties of High-Carbon Bainitic Steel in Hot-Rolling and Long-Term Low-Temperature Annealing

Dembiczak

Knapiński

2021

Materials

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“…While numerous studies report the SR sensitivity of yield stress, plateau stress, and energy absorption capacity in metallic foams [10,[17][18][19], con icting reports exist, with some suggesting insensitivity to SR [20,21]. Yadav et al reported negligible SR sensitivity in aluminum foam [22], while Ruan et al found a lack of sensitivity to SR in terms of plateau stress [23]. The behavior of metallic foam remains unpredictable regarding SR sensitivity, emphasizing the importance of studying foam compression behavior for designing engineering components subjected to both quasi-static and dynamic loadings.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Influence of B4Cp Concentration and Strain Rate on the Compressive Loading Behavior of Closed Cell Al2024-B4Cp Composite Foams for Enhanced Energy Absorption Applications

Singh,

Sharma,

Kumar

et al. 2024

Preprint

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Aluminum foams find extensive applications in the automotive, marine, and defence industries, owing to their exceptional properties like high specific strength and the ability to absorb energy effectively under constant stress. In the current study, the aluminum composite foams (ACFs) reinforced with different wt% (n=2,4,6,8 and 10) of B4Cp (21-30µm) have been developed by stir casting method and their compressive properties at quasi-static (0.001s-1), intermediate (1s-1) and dynamic loading (680s-1) have been investigated. The study shows that adding B4Cp up to 8wt% initially increases foam expansion and cell size, followed by a decrease, while relative density and cell wall thickness exhibit the opposite trend. At all tested strain rates, the compressive properties such as peak stress, average plateau stress, and energy absorption capacity show a consistent increase with the rise in B4Cp wt%. The density normalized average plateau stress confirmed the strengthening effect due to B4Cp addition in the foam. The developed aluminum foams exhibit strain rate sensitivity in their average plateau stress.

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“…The commonly used foaming agents are CaCO 3 , CaH 2 ZrH 2 , and TiH 2 as reported by various researchers. [20][21][22] Foaming agents have their limitations from the application point of view due to uncontrolled pores, cell size, and lack of desired mechanical properties. 23 Recently, some works reported the development of hybrid foam using hollow fillers along with the addition of a foaming agent to develop open and closed cell structures.…”

Section: Introductionmentioning

confidence: 99%

Enhanced energy absorption and microstructural studies on hollow glass microsphere filled closed cell aluminum matrix syntactic foam

Thiyagarajan

Kumar

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The research on lightweight materials for advanced engineering applications attracted the development of metal matrix syntactic foams. The automobile sector has started using Al-based alloys in structural components such as crash-box, underride-guard, fenders, dampers, A, B, and C Pillars. The present study explores the energy absorption behavior; microstructural characterization such as SEM, EDS, and XRD analysis of hollow glass microsphere (HGM) filled aluminum matrix syntactic foam. A380 aluminum alloy reinforced with different volume fractions 10%, 20%, 30%, and 35% of hollow glass microspheres were used in the fabrication of syntactic foam using the stir casting technique. The quasi-static compression test conducted, evaluated the plateau strength, which improved from 284.14 to 341.69 MPa, and energy absorption capacity was observed in the range 139.25–187.92 MJ/m3. The plateau strength and energy absorption capacity were improved by 16.82% and 25.89% for the 35 vol.% HGM sample as compared with 10 vol.% HGM filled aluminum matrix syntactic foam. The addition of a calcium thickening agent in the casting process improved the bonding between aluminum and HGM particle and also the homogeneous distribution of HGM. The XRD analysis revealed the chemical reaction that occurred between aluminum and SiO2 that produced the AlSiO2 and Al2SiO5 interfacial compounds. This reaction tends to collapse the HGM cell wall and fills it with matrix material.

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Study on activation energy and strain rate sensitivity of closed-cell aluminium hybrid composite foam

Cited by 17 publications

References 49 publications

Shaping Microstructure and Mechanical Properties of High-Carbon Bainitic Steel in Hot-Rolling and Long-Term Low-Temperature Annealing

Shaping Microstructure and Mechanical Properties of High-Carbon Bainitic Steel in Hot-Rolling and Long-Term Low-Temperature Annealing

Exploring the Influence of B4Cp Concentration and Strain Rate on the Compressive Loading Behavior of Closed Cell Al2024-B4Cp Composite Foams for Enhanced Energy Absorption Applications

Enhanced energy absorption and microstructural studies on hollow glass microsphere filled closed cell aluminum matrix syntactic foam

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