Lightweight Medium Entropy Magnesium Alloy with Exceptional Compressive Strength and Ductility Combination

Tun, Khin Sandar; Charadva, Vikhash; Gupta, Manoj

doi:10.1007/s11665-021-05478-w

Cited by 12 publications

(2 citation statements)

References 41 publications

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“…Magnesium makes up about 2.7% of the earth's crust, being the 8th most abundant element and the third most abundant structural metal [1][2] [3]. It has been exploited in making structural components such as aircraft air frames, engines, transmission cases, seat frames and armor vehicles [2][3] [5][6]. Nonetheless, in spite of the many structural applications of magnesium alloys, very low quantities are being used in the automotive, defense and aerospace industries [3][6].…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of adiabatic shear band formation in AZ31B magnesium alloy during high strain rate impact

Tetteh

Duntu

Boakye‐Yiadom

2023

Int J Adv Manuf Technol

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Adiabatic shear bands (ASBs) are known to be the dominant damage mechanisms in structural materials under high strain rate loading such as Magnesium (Mg) alloys. Therefore, to tailor the mechanical performance of Mg alloys for structural applications, there is a need to understand their susceptibility to strain localization and formation of ASBs, including the mechanism of crack initiation and propagation.In this study, as-fabricated (extruded) and heat-treated (annealed at 400 o C) AZ31B Mg alloys were subjected to high strain rate loading using the direct impact hopkinson pressure bar (DIHPB) under different strain rates (834-2435 s − 1 ) at room temperature. The impact specimens failed through the occurrence of strain localization, formation of diffused ASBs and initiation/propagation of micro-cracks along the path of evolved ASBs. Thus, strain localization results in crack initiation and propagation despite the inherent brittle nature of the Mg alloys. Also, the presence of fractured second-phase particles dispersed within voids and along shear band path suggests particle fragmentation and re nement due to the strain localization. This also resulted in void nucleation, growth and coalescence at a later stage during the deformation. In addition, there seems to be a threshold strain rate ( ~ > 2225 s − 1 ) beyond which the specimen fractures regardless of the initial microstructure of the Mg alloys.

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Section: Introductionmentioning

confidence: 99%

Susceptibility of adiabatic shear band formation in AZ31B magnesium alloy during high strain rate impact

Tetteh

Duntu

Boakye‐Yiadom

2023

Int J Adv Manuf Technol

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“…In this way, novel materials such as complex concentrated alloys, medium/high entropy alloys, aluminum-based hybrid composites, etc. has been developed in the last years [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution as a Function of Increasing Aluminum Content in Novel Lightweight Cast Irons

Obregon

Sánchez

Eguizabal

et al. 2021

Metals

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In the context of the development of new lightweight materials, Al-alloyed cast irons have a great potential for reducing the weight of the different part of the vehicles in the transport industry. The correlation of the amount of Al and its effect in the microstructure of cast irons is not completely well established as it is affected by many factors such as chemical composition, cooling rate, etc. In this work, four novel lightweight cast irons were developed with different amounts of Al (from 0 wt. % to 15 wt. %). The alloys were manufactured by an easily scalable and affordable gravity casting process in an induction furnace, and casted in a resin-bonded sand mold. The microstructural evolution as a function of increasing Al content by different microstructural characterization techniques was studied. The hardness of the cast irons was measured by the Vickers indentation test and correlated with the previously characterized microstructures. In general, the microstructural evolution shows that the perlite content decrease with the increment of wt. % of Al. The opposite occurs with the ferrite content. In the case of graphite, a slight increment occurs with 2 wt. % of Al, but a great decrease occurs until 15 wt. % of Al. The addition of Al promotes the stabilization of ferrite in the studied alloys. The hardness obtained varied from 235 HV and 363 HV in function of the Al content. The addition of Al increases the hardness of the studied cast irons, but not gradually. The alloy with the highest hardness is the alloy containing 7 wt. % Al, which is correlated with the formation of kappa-carbides and finer perlite.

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Development of a Low Entropy, Lightweight, Multicomponent, High Performance (Hardness + Strength + Ductility) Magnesium-Based Alloy

Tun

Nahata

Vincent

et al. 2022

JOM

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Lightweight Medium Entropy Magnesium Alloy with Exceptional Compressive Strength and Ductility Combination

Cited by 12 publications

References 41 publications

Susceptibility of adiabatic shear band formation in AZ31B magnesium alloy during high strain rate impact

Susceptibility of adiabatic shear band formation in AZ31B magnesium alloy during high strain rate impact

Microstructural Evolution as a Function of Increasing Aluminum Content in Novel Lightweight Cast Irons

Development of a Low Entropy, Lightweight, Multicomponent, High Performance (Hardness + Strength + Ductility) Magnesium-Based Alloy

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