Hall–Petch relation and grain boundary slipping in Al Mg Sc alloys with fine equiaxed grain structure

Zhang, L.; Liu, C.Y.; Xie, H.Y.

doi:10.1016/j.matchar.2022.112472

Cited by 17 publications

(1 citation statement)

References 32 publications

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“…It was shown that the number of pressing cycles and the processing route strongly affect the microstructure and mechanical properties of ECAP'ed materials [10,11]. Metals and alloys deformed by ECAP showed heterogeneous microstructures, containing high-energy grain boundaries [12,13] or homogenous microstructures [14][15][16]. Indeed, the nature of the microstructure (homogeneous or heterogeneous) depends on the deformed material and the operating parameters of the ECAP.…”

Section: Introductionmentioning

confidence: 99%

Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing

Korchef

Souid

2023

Crystals

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In the present study, the microstructure, mechanical properties, and stored energy of an aluminum alloy containing iron-rich fine precipitates, subjected to severe plastic deformation through equal-channel angular pressing (ECAP), were investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and atomic force microscopy. Up to four passes through ECAP resulted in significant nanometer-scale grain refinement, as well as the accumulation of lattice defects, such as dislocations and mesoscopic shear planes. This resulted in a noticeable enhancement in the Vickers microhardness and the flow stress after ECAP. Differential scanning calorimetry results showed that the ECAP’ed material exhibited two exothermal peaks at 222 ± 2 °C and 362 ± 2 °C, with total thermal effects of ΔH = 4.35 and 6.5 J/g, respectively. Slight increases in the ECAP’ed material microhardness and flow stress were observed at 200 °C. The heat release, at a relatively low temperature, and the slight improvement in the mechanical properties were attributed to the evolution of low- and high-angle misorientation, with the strain and the pinning of tangled dislocation caused by the existing fine particles. The second peak was attributed to grain growth, resulting in a significant softening of the material.

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Section: Introductionmentioning

confidence: 99%

Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing

Korchef

Souid

2023

Crystals

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Edge Dislocation and Grain Boundaries Effects on the Mechanical Properties in NiCoAl$N i C o A l$ Medium Entropy Alloy

Khan,

Ali

2024

Adv Eng Mater

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Medium‐entropy alloys (MEAs) are becoming increasingly popular owing to their superior mechanical features. Using molecular dynamics (MD) simulations, we, for the first time, investigate in this work how grain boundaries (GBs) and dislocations affect the mechanical properties of face‐centered cubic (FCC) equiatomic NiCoAl MEA. We analyze lattice distortion, elastic constants and moduli, machinability index, Vickers hardness, and Kleinman parameters to explore how grain boundaries affect NiCoAl MEA. It tends to become more rigid based on the link between its elastic moduli and GBs. Interestingly, our analyses of Cauchy pressure, Poisson’s, and Pugh’s ratios all indicate the ductility of the studied MEA. The investigation of anisotropy factors indicates that NiCoAl MEA exhibits anisotropy, which is reduced by the addition of GBs. Mechanical properties of our considered MEA, such as ductility, fracture toughness, and stability, are significantly influenced by the GBs. Our results show that studying these phenomena can help us design structural nano‐metal materials with superior mechanical properties, allowing them to be used in various applications.This article is protected by copyright. All rights reserved.

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Friction stir welding of a rapidly solidified thin-strip continuous cast AA5182 Al–Mg alloy: analysis of microstructure evolution, mechanical properties, and corrosion resistance

Pouraliakbar,

Jamshidi Aval,

Farajollahi

et al. 2024

Int J Adv Manuf Technol

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Hall–Petch relation and grain boundary slipping in Al Mg Sc alloys with fine equiaxed grain structure

Cited by 17 publications

References 32 publications

Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing

Grain Refinement and Strengthening of an Aluminum Alloy Subjected to Severe Plastic Deformation through Equal-Channel Angular Pressing

Edge Dislocation and Grain Boundaries Effects on the Mechanical Properties in NiCoAl$N i C o A l$ Medium Entropy Alloy

Friction stir welding of a rapidly solidified thin-strip continuous cast AA5182 Al–Mg alloy: analysis of microstructure evolution, mechanical properties, and corrosion resistance

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