Free volume formation and the high strength of pure Mg after room temperature core-sheath ECAP passes

Heydarinia, Ali; Mohri, Maryam; Asghari‐Rad, Peyman; Kim, Hyoung Seop; Nili‐Ahmadabadi, Mahmoud

doi:10.1016/j.jmrt.2022.02.061

Cited by 15 publications

(2 citation statements)

References 58 publications

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“…For better visualization, all components except for the AA5083 samples were made invisible during the simulation. The two halves of the die and the modeled plunger were rigid entities created using a non-formable hypothetical material [11]. In the experimental setup, the die of ECAP and specimen dimensions were carefully matched to ensure consistency.…”

Section: Experimental Methodsmentioning

confidence: 99%

Mechanical characteristics and crystallographic texture of AA5083 during Equal Channel Angular Pressing Technique

Singh,

Agrawal

2024

E3S Web Conf.

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AA5083 bars processed by four pass ambient Equal Channel Angular Pressing were subjected to intersection annealing, where time and temperature were varied after each pass. The microstructures, texturing and compressive characteristics of the samples were meticulously examined. Due to the high annealing temperatures, both ultimate tensile strength and compressive stresses decreased with increasing grain size. However, intersection annealing at room temperature resulted in the best compressive yield strength. The deformation behavior of AA5083 billets was investigated using finite element analysis. Electron back scatter diffraction was employed to examine the texture of the Equal Channel Angular Pressed billet crystals. Extensive research was conducted on the tensile properties and Vickers microhardness. The finite element simulations revealed that the 900 die exhibited a significantly more uniform dispersion of plastic strain compared to the 1200 die. The renewal of additional slip mechanisms during the four Pass process was attributed to the grain refining that occurred after the 1-Pass and 2-Pass stages. Equal Channel Angular Pressing successfully produced a homogeneously ultra-fine grained microstructure. The increase in strength was attributed to grain refining and dislocation strengthening. Molecular dynamics simulations were employed to study the ECAPed approach of AA5083 providing insights into the deformation behavior and polycrystal formation.

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Section: Experimental Methodsmentioning

confidence: 99%

Mechanical characteristics and crystallographic texture of AA5083 during Equal Channel Angular Pressing Technique

Singh,

Agrawal

2024

E3S Web Conf.

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“…Their application has been considerably hampered by this poor ductility and formability. It is well established, however, that a significant improvement in the microstructure and mechanical properties of Mg alloys can be achieved through plastic deformation (Wang et al, 2021;Heydarinia et al, 2022;Mansoor et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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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Effect of room temperature multi-pass ECAP deformation on mechanical properties and precipitation phase distribution of 7075 aluminium alloy

Luo

Yang

et al. 2023

J. Cent. South Univ.

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Free volume formation and the high strength of pure Mg after room temperature core-sheath ECAP passes

Cited by 15 publications

References 58 publications

Mechanical characteristics and crystallographic texture of AA5083 during Equal Channel Angular Pressing Technique

Mechanical characteristics and crystallographic texture of AA5083 during Equal Channel Angular Pressing Technique

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

Effect of room temperature multi-pass ECAP deformation on mechanical properties and precipitation phase distribution of 7075 aluminium alloy

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