Effect of equal channel angular pressing (ECAP) on the evolution of texture, microstructure and mechanical properties in the Al-Cu-Li alloy AA2195

Suresh, M.; Sharma, Amit; More, A.M.; Kalsar, Rajib; Bisht, Anuj; Nayan, Niraj; Suwas, Satyam

doi:10.1016/j.jallcom.2019.01.161

Cited by 65 publications

(14 citation statements)

References 45 publications

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“…With deformations larger than six ECAP passes, Figure 1h–i exhibit that most of the LAGBs are transformed into HAGBs. According to Suresh et al, [ 33 ] under the analyzed deformation conditions, the grains typically subdivide because of the creation of deformation bands, where grain distortions create a contribution to increasing HAGBs fraction with more significant deformations. In addition, Humphreys and Hatherly [ 34 ] pointed out that grain boundaries with HAGB character also evolve during deformation, leading to a fine‐grained microstructure formed by new small grains surrounded by HAGBs.…”

Section: Resultsmentioning

confidence: 99%

Strain‐Hardening Behavior in an AA6060‐T6 Alloy Processed by Equal Channel Angular Pressing

Khelfa

Muñoz-Bolaños

et al. 2020

Adv Eng Mater

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Strain hardening is a useful mechanism for improving mechanical properties in materials. This study investigates the strain‐hardening behavior of an AA6060 alloy processed by equal channel angular pressing (ECAP) up to 12 passes. Analysis by electron backscattered diffraction (EBSD) shows that the average geometrically necessary dislocations (GNDs) density increases continually up to the fourth pass and then saturates at a value of ≈1.85 × 1014 m−2. Hollomon and Kocks–Mecking–Estrin (KME) analysis are used to investigate the strain‐hardening behavior of the resulting ultrafine‐grained alloy. Results indicate that the strain‐hardening capacity (HC) and the strain‐hardening exponent (n) of all deformed specimens are lower in comparison with the as‐received condition. Moreover, the strain‐hardening rate fluctuates with the ECAP passes. First, it increases from the first ECAP pass up to the fourth pass, then diminishes up to the fifth pass, and finally, it increases again with further deformation. The difference in the strain‐hardening behavior of the ECAPed AA6060 is examined in terms of the grain size effect. It is shown that the strain‐hardening curves change notably with diminishing the grain size. In addition, the KME model is used to depict the storage and annihilation of dislocations in the ECAPed specimens.

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Section: Resultsmentioning

confidence: 99%

Strain‐Hardening Behavior in an AA6060‐T6 Alloy Processed by Equal Channel Angular Pressing

Khelfa

Muñoz-Bolaños

et al. 2020

Adv Eng Mater

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“…Texture evolution during deformation via routes B A and B C were found to be nearly similar. On an average, textures measured at the mid plane of ECAP billets, showed that the components B/ B and A Ã 1 showed the highest intensities when deformed by routes A, B A and B C , while A Ã 2 and C components showed highest intensities when deformed by route C. 24) In another Al alloy AA2195, Suresh et al 26) observed that up to 3rd pass by route A, the components A Ã 1 , A Ã 2 , and B/ B exhibited highest intensities while after the 4th pass A Ã 2 and C components exhibited highest intensities. Skrotzki et al have extensively studied the heterogeneity of ECAP textures in Al, Ni, Cu and Ag 6,14,16,17,22,27) (Fig.…”

Section: Equal Channel Angular Pressing (Ecap)mentioning

confidence: 98%

Texture Evolution in Severe Plastic Deformation Processes

Suwas

Mondal

2019

Mater. Trans.

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Severe plastic deformation processes involve large grain rotations due to the action of different modes of plastic deformation and other microstructural changes which lead to characteristic texture formation. The present review deals with the evolution of texture during the most important severe plastic deformation processes, namely Equal Channel Angular Pressing (ECAP), High Pressure Torsion (HPT), Friction Stir Processing (FSP), Accumulative Roll Bonding (ARB) and Multi-Axial Forging (MAF). First three of the processes are shear based, while the latter two are plane-strain based. The textures formed during ECAP are visually different from simple shear textures due to (i) the inclination of the shear plane, (ii) additional contribution of non-shear based deformation. The relative intensities of texture components are function of deformation micro-mechanisms, amount of straining and configuration of the strain path. The texture evolved during HPT is very similar to simple shear texture, with additional consequences of microstructural changes that occur due to very large deformations. The textures formed in FSP process also resemble shear textures. On the other hand, texture evolution during ARB and MAF can be described using plane strain deformation. The present review deals with texture evolution during severe plastic deformation as a function of nature of processes and type of materials.

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“…Equal-channel angular pressing (ECAP) is commonly considered as a superior process for refining the microstructure of different materials and is used for producing bulk ultrafine-grained billets with excellent physical and chemical characteristics. [30][31][32][33] In the present work, as one of the most critical structural materials, AZ31 alloy is expected to be activated by remarkably refined microstructure induced by ECAP. Studies on ECAP have mainly concentrated on its part in mechanical and corrosion properties, whereas the literature related to the effects on discharge performance has not been found yet.…”

Section: Introductionmentioning

confidence: 95%

Effects of microstructure evolution on discharge properties of AZ31 alloy as anode for seawater battery

Xie

Jiang

et al. 2020

Materials & Corrosion

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In recent years, many researchers have been focusing on improving the discharge properties of AZ31 magnesium alloy for battery applications. In this paper, the equal‐channel angular pressing (ECAP) is used as a preferred way of refining the microstructure to enhance the discharge characteristics of AZ31 alloy as the anode for seawater batteries. The electrochemical discharge behaviors of ECAP‐processed AZ31 alloy are investigated along extrusion surfaces, normal cross‐sections, and transverse cross‐sections and compared with as‐cast and homogenized samples. On the basis of the findings, the anode efficiency is improved effectively through the ECAP method, with approximate isotropy in the discharge behaviors of refined AZ31 alloy. The enhanced discharge performance can be attributed to the refined grains, uniform grain sizes, and dispersed β‐Mg17Al12 after ECAP processing.

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Effect of equal channel angular pressing (ECAP) on the evolution of texture, microstructure and mechanical properties in the Al-Cu-Li alloy AA2195

Cited by 65 publications

References 45 publications

Strain‐Hardening Behavior in an AA6060‐T6 Alloy Processed by Equal Channel Angular Pressing

Strain‐Hardening Behavior in an AA6060‐T6 Alloy Processed by Equal Channel Angular Pressing

Texture Evolution in Severe Plastic Deformation Processes

Effects of microstructure evolution on discharge properties of AZ31 alloy as anode for seawater battery

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