Influence of high-pressure torsion on microstructure, hardness and shear strength of AM60 magnesium alloy

Khaleghi, A.A.; Akbaripanah, F.; Sabbaghian, M.; Máthis, Kristián; Minárik, Peter; Veselý, Jozef; El-Tahawy, Moustafa; Gubicza, Jenő

doi:10.1016/j.msea.2020.140158

Cited by 22 publications

(22 citation statements)

References 46 publications

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“…The weakening of basal texture occurred with the increasing cumulative shear strain. In observation of HPTed AM60 alloys (Khaleghi et al, 2021), the basal texture formed after 1 HPT turn and softened after 10 HPT turns. Moreover, the intensity and distribution of basal texture could be altered with increasing shear strain as in AM60 alloys caused by the Mg 17 Al 12 precipitates in the HPT process.…”

Section: Effect Of Accumulative Shear Strainmentioning

confidence: 96%

“…It is generally thought that the textural evolution in Mg alloys can be expressed as a function of HPT turns, which determine the cumulative shear strain. Table 2 summarizes the textural evolution of HPTed Mg alloys as a function of HPT turns (Huang et al, 2013;Qiao et al, 2014;Lee et al, 2015;Bourezg et al, 2018;Hanna et al, 2019a;Khaleghi et al, 2021). An experiment processing pure Mg by HPT under the conditions of 6.0 GPa, 1 rpm, and at room temperature, with turns from 1/8 to 16, was carried out by Qiao et al (2014).…”

Section: Effect Of Accumulative Shear Strainmentioning

confidence: 99%

“…Moreover, the intensity and distribution of basal texture could be altered with increasing shear strain as in AM60 alloys caused by the Mg 17 Al 12 precipitates in the HPT process. The texture evolution of HPTed AM60 alloys with different turns is shown in Figure 5 (Khaleghi et al, 2021). The formation of basal texture created a low Schmid factor for basal slip during plastic deformation at room temperature, and hence non-basal slip systems with high CRSS are needed for a significant increase in yield strength.…”

Section: Effect Of Accumulative Shear Strainmentioning

confidence: 99%

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The microstructural, textural, and mechanical effects of high-pressure torsion processing on Mg alloys: A review

et al. 2022

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Magnesium (Mg) alloys attract considerable attention in the fields of aerospace, defense technology, and automobile production, owing to the advantages of their low density, their highly specific strength/stiffness, and their good damping and electromagnetic shielding performance. However, low strength and poor ductility limit further application. Severe plastic deformation is considered the most promising means of producing ultrafine-grained Mg alloys and improving their mechanical properties. To this end, high-pressure torsion (HPT) is one of the most effective techniques. This article outlines the microstructure, texture, and mechanical properties of Mg alloys processed using HPT. The effects of deformation parameters, such as processing temperature, turns, applied pressure, and rotation speed, on the grain refinement and secondary phases are discussed. Textural evolution is detailed in light of both intrinsic and extrinsic factors, such as cumulative strain and the composition of the alloy elements. The subsequent enhancement of mechanical properties and mechanisms, and the significant contribution of the HPT process to strength are further reviewed. Given the advantages of HPT for grain refinement and structural modification, researchers have proposed several novel processes to extend the industrial application of these alloys.

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Section: Effect Of Accumulative Shear Strainmentioning

confidence: 96%

Section: Effect Of Accumulative Shear Strainmentioning

confidence: 99%

Section: Effect Of Accumulative Shear Strainmentioning

confidence: 99%

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The microstructural, textural, and mechanical effects of high-pressure torsion processing on Mg alloys: A review

et al. 2022

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“…AM series alloys have a certain amount of Al besides manganese (Mn), while AZ contains Al and zinc [7]. AM series alloys are the most frequently used in industry applications such as in the production of automotive parts [11][12][13] owing to its unique properties, such as sufficient ductility, high energy absorption, low density, and reasonable strength [14,15]. However, Mg alloys have limited applications in working environments due to their poor corrosion resistance because of the lack of a protective passive oxide film on Mg alloys [1,16,17].…”

Section: Introductionmentioning

confidence: 99%

Improving the Corrosion Behavior of Biodegradable AM60 Alloy through Plasma Electrolytic Oxidation

Alateyah

Aljohani

Alawad

et al. 2021

Metals

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Magnesium (Mg) alloys have unique properties. However, their applications are limited in working environments due to their poor corrosion resistance. Plasma electrolytic oxidation (PEO) is one of the most environmentally friendly and cost-effective ways that has been promoted to treat Mg alloys. In this study, we investigated the effect of electrical parameters on the microstructure, as well as the mechanical and corrosion resistance of AM60 alloy coated with PEO. The electrical parameters studied were current mode (unipolar and bipolar), frequency and duty ratio. The microstructure evolution of the coated AM60 substrates was studied using X-ray diffraction and scanning electron microscopy. Subsequently, the mechanical properties were determined using compression tests and microhardness measurements. The potentiodynamic polarization curves indicated that the PEO-coated samples experienced a significant decrease of 99.9% in the corrosion rate compared to the base metal. The electrochemical impedance spectroscopy findings showed that PEO coating increased the corrosion resistance of the AM60 magnesium alloy by 1071870% compared to the base metal. On the other hand, the PEO coated samples showed superior adhesion to the substrate. Moreover, the PEO coating led to an improvement in the hardness value by 114% compared to base metal, coupled with insignificant change in the compressive properties.

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“…ECAP equal-channel angular pressing, ECAR equal-channel angular rolling, ED electrodeposition, RCB rotational constrained bending, and MF multidirectional forging. The processing conditions of the listed materials can be found in Refs [27,[33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. …”

mentioning

confidence: 99%

Reliability and interpretation of the microstructural parameters determined by X-ray line profile analysis for nanostructured materials

Gubicza

2022

Eur. Phys. J. Spec. Top.

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In this overview, the applicability of X-ray diffraction line profile analysis (XLPA) for the characterization of the microstructure in nanostructured materials is overviewed. The dislocation densities obtained by whole pattern fitting and from the breadth of the diffraction peaks are compared. Both theoretical considerations and experimental evidences prove that the evaluation of the peak breadth solely is not suitable for the determination of the dislocation density. In addition, the microstructural parameters determined by XLPA were compared to the values obtained directly by microscopic methods. It was found that the ratio of the grain size obtained by microscopy and the crystallite size determined by XLPA decreases with the reduction of the grain size in nanomaterials, and below $$\sim $$ ∼ 20 nm, the two values agree within the experimental error. In addition, correlation between the microstructural parameters (e.g., crystallite size and dislocation density) determined by XLPA was not found. It was revealed that bottom–up processing methods can produce similarly high defect density in nanostructured materials as severe plastic deformation (SPD). The influence of stacking fault energy, melting point, and degree of alloying on the microstructure of nanomaterials is discussed in detail.

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Influence of high-pressure torsion on microstructure, hardness and shear strength of AM60 magnesium alloy

Cited by 22 publications

References 46 publications

The microstructural, textural, and mechanical effects of high-pressure torsion processing on Mg alloys: A review

The microstructural, textural, and mechanical effects of high-pressure torsion processing on Mg alloys: A review

Improving the Corrosion Behavior of Biodegradable AM60 Alloy through Plasma Electrolytic Oxidation

Reliability and interpretation of the microstructural parameters determined by X-ray line profile analysis for nanostructured materials

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