Severe plastic deformation of tubular AA 6061 via equal channel angular pressing

Jafarlou, Davoud M.; Zalnezhad, E.; Hassan, Mohsen A.; Ezazi, Mohammadamin; Mardi, N.A.; Hamdi, M.; Yoon, Gil Ho

doi:10.1016/j.matdes.2015.11.026

Cited by 43 publications

(13 citation statements)

References 32 publications

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“…Many studies focus on the influence of SPD (and ECAP) on the microstructure of aluminium alloys (AA), e.g. Al-Mg Si alloys [ 4,[12][13][14]. Khelfa et al observed a 97 % decrease in the grain size after only one ECAP pass in AA 6060 T6 [15].…”

Section: Introductionmentioning

confidence: 99%

Influence of equal-channel angular pressing on the microstructure and corrosion behaviour of a 6xxx aluminium alloy for automotive conductors

et al. 2020

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An Al-Mg-Si aluminium alloy was shaped by using a two-pass equal-channel angular pressing (ECAP) process. This led to fragmentation of the coarse Fe-rich intermetallics (IMCs), a decrease in grain size and an increase in the high angle grain boundary (HAGB) density, with overconcentration of HAGBs around the IMCs. Corrosion tests in NaCl solution showed that, before and after ECAP, only pitting corrosion occurred. However, for ECAP samples, pits were more numerous due to the fragmentation of the IMCs; they were also larger and less deep, their propagation being strongly influenced by the presence of very small grains around the IMCs.

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Section: Introductionmentioning

confidence: 99%

Influence of equal-channel angular pressing on the microstructure and corrosion behaviour of a 6xxx aluminium alloy for automotive conductors

et al. 2020

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“…The same behavior has been reported previously for the ECAP process of the bulk and tube-formed aluminum alloys. 35,38,39 Figure 3 shows the engineering stress-strain curve of the aluminum wires during the ECAP process up to 16 passes. Accordingly, imposing the ECAP process increases the magnitudes of yield and ultimate tensile strengths from (102 and 138 MPa) for the annealed condition to (171 and 203 MPa) for the first pass, (202 and 227 MPa) for the fourth pass, (226 and 249 MPa) for the eighth pass, and (235 and 266 MPa) for the sixteenth pass, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…This type of aluminum alloy has been chosen due to its various construction, transportation, and electronics applications such as couplers, connectors, appliance fittings, hinge pins, aircraft, marine, automotive fittings, brake pistons, electrical fittings, and connectors. [35][36][37]…”

Section: Introductionmentioning

confidence: 99%

Equal channel angular pressing of wire-formed Al6063 by PU rubber-assisted procedure

Ebrahimi

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et al. 2021

The Journal of Strain Analysis for Engineering Design

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Expanding suitable severe plastic deformation processes seems essential to design lightweight wire-formed materials for emerging demands. In this regard, 6063 aluminum alloy in the form of wire was processed successfully by polyurethane rubber assisted-equal channel angular pressing up to 16 passes by route BC. It was found that significant improvement of hardness and strength is achieved at the initial passes due to the increment of material’s dislocations density which leads to the crystallite size decrease and lattice microstrain increase. Also, subsequent passes improve the mechanical properties with a gentle rate due to the saturation of dislocation strengthening. The fractography analysis indicated that the ductile fracture mode of the annealed aluminum decreases by imposing the ECAP process. It is related to the formation of cleavage and rive patterns and the reduction in the number and size of the dimples compared to the initial condition. Eventually, X-ray diffraction findings showed that by adding pass numbers, the isotropy degree of the aluminum sample enhances because of the lowest diffraction scattering.

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“…Jafarlou ve ark. [23], eş kanal açısal presleme (ECAP) yöntemi ile boru şeklindeki AA6061 malzemenin aşırı plastik deformasyonu üzerine bir çalışma yapmışlardır. Çalışmalarında kanal açısı olarak 120º ve köşe yuvarlatma açısını da 22º sabit tutmuşlardır.…”

Section: şEkil 1 Aşırı Plastik Deformasyonda Tek Geçiş Esnasında Ileunclassified

Boruların Çift Geçişli Paralel Tüp Kanal Açısal Presleme (DP- PTCAP) Yöntemi ile Aşırı Plastik Deformasyon Analizi

Taşdemir

2020

Fırat Üniversitesi Mühendislik Bilimleri Dergisi

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Öz: Aşırı plastik deformasyon (APD), nano yapılı ve ultra ince taneli malzemeler elde edilmesi amacı ile kullanılan bir yöntemdir. Tüp şeklindeki malzemelerin aşırı plastik deformasyonunda kullanılan birçok yöntem vardır. Bu yöntemlerden biri de paralel tüp kanal açısal presleme (PTCAP) yöntemidir. Bu çalışmada, boru şeklindeki parçaların deformasyonu çift geçişli paralel tüp kanal açısal presleme (DP-PTCAP) metodu kullanılarak araştırılmıştır. Analizlerde, 5 farklı kanal açısı, 4 farklı kesit genişleme oranı ve 4 farklı boyutsuz uzunluk kullanılmıştır. Bu parametrelerin elde edilen tüp (boru) şeklindeki parçaların gerilme, birim şekil değişimi ve şekillendirme kuvvetine etkileri sonlu elemanlar yöntemi ile analiz edilmiştir. Çalışmada AA6061 malzeme kullanılmıştır. Analizler sonucunda, kanal açısının artması ile efektif birim şekil değişimi, şekillendirme kuvveti ve malzemede oluşan gerilmenin azaldığı görülmüştür. Çift geçişli kalıplarla elde edilen malzemelerin birim şekil değişiminin tek geçişli kalıplara nazaran daha yüksek olduğu belirlenmiştir. Yapılan çalışma sonucu analizlerden elde edilen birim şekil değişimine bakarak çift geçişli kalıplar ile elde edilen malzemelerin tane yapısının tek geçişli kalıplara nazaran daha ince taneli olduğu söylenebilir.

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Severe plastic deformation of tubular AA 6061 via equal channel angular pressing

Cited by 43 publications

References 32 publications

Influence of equal-channel angular pressing on the microstructure and corrosion behaviour of a 6xxx aluminium alloy for automotive conductors

Influence of equal-channel angular pressing on the microstructure and corrosion behaviour of a 6xxx aluminium alloy for automotive conductors

Equal channel angular pressing of wire-formed Al6063 by PU rubber-assisted procedure

Boruların Çift Geçişli Paralel Tüp Kanal Açısal Presleme (DP- PTCAP) Yöntemi ile Aşırı Plastik Deformasyon Analizi

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