Multi-Objective Optimization of Multi-Channel Spiral Twist Extrusion Process Using a Response Surface Approach and Finite Element Analysis

Fouad, Dina; El-Garaihy, Waleed H.; Salem, Hanadi G.; Moataz, A.

doi:10.7449/2018/mst_2018_1470_1477

Cited by 3 publications

(3 citation statements)

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“…However, with reference to Figure 16d, it is markedly evident that 1-pass (β 40 • ) processing results in a greater variation in hardness distribution compared to its counterpart demonstrated in Figure 16c, showing that greater homogeneity is attained after 3-passes of MCSTE (β 30 • ). Similar conclusions were reported by the authors for AA1100 processed via MCSTE [46]…”

Section: Grain Structuresupporting

confidence: 91%

Grain Structure Evolution and Mechanical Properties of Multi-Channel Spiral Twist Extruded AA5083

Fouad

El-Garaihy

Ahmed

et al. 2021

Metals

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This study presents a comprehensive evaluation of the effects of multi-channel spiral twist extrusion (MCSTE) processing on the mechanical properties and structural evolution of AA5083. The structural evolution and texture developed were mapped by electron backscatter diffraction (EBSD) for three successive passes and compared with an as-annealed plate. An evaluation of the hardness and tensile properties was presented and correlated with the EBSD findings. The displayed EBSD results revealed that grain refinement was strongly associated with the presence of a high density of low-angle grain boundaries (LAGBs) after one pass, which developed into fine grains of less than 20 μm and high-angle grain boundaries (HAGBs) after three MCSTE passes. The three pass processing led to a 65% reduction in grain size. This reduction in grain size was coupled with an enhancement in the hardness and tensile properties. Additionally, the crystallographic texture study represented a slightly random texture due to the presence of intermetallic particles in AA5083. This study demonstrates the efficacy of MCSTE as a grain refinement tool.

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Section: Grain Structuresupporting

confidence: 91%

Grain Structure Evolution and Mechanical Properties of Multi-Channel Spiral Twist Extruded AA5083

Fouad

El-Garaihy

Ahmed

et al. 2021

Metals

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“…Currently, the most suitable route for producing UFG materials is the use of severe plastic deformation (SPD) techniques which can effectively enhance grain refining for industrial applications [22,23]. Several methods have been originated for processing SPD such as equal channel angular pressing (ECAP) [14,[24][25][26][27], high-pressure torsion [18][19][20], twist extrusion (TE) [28], accumulative rolling bonding [29], multi-directional forging [30], multi-channel spiral twist extrude (MCSTE) [15][16][17]31], friction stir welding [32][33][34], rolling in a three high skew rolling mill [35], and extrusion with KOBO [36] for improving ductility and mechanical properties in a wide range of materials. Among various SPD techniques, ECAP fulfilled almost all expectations of an SPD process such as producing nanostructure or UFG structure in metals and alloys as well as its applicability to industrial needs [37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Effect of ECAP on the Plastic Strain Homogeneity, Microstructural Evolution, Crystallographic Texture and Mechanical Properties of AA2xxx Aluminum Alloy

El-Shenawy

Ahmed

Nassef

et al. 2021

Metals

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This study presents a comprehensive evaluation of Equal Channel Angular Pressing (ECAP) processing on the structural evolution and mechanical properties of AA2xxx aluminum alloy. Finite element analysis (FE) was used to study the deformation behavior of the AA2xxx billets during processing in addition investigate the strain homogeneity in the longitudinal and transverse direction. Billets of AA2011 aluminum alloy were processed successfully through ECAP up to 4-passes with rotating the sample 90° along its longitudinal axis in the same direction after each pass (route Bc) at 150 °C. The microstructural evolution and crystallographic texture were analyzed using the electron back-scatter diffraction (EBSD) and optical microscopy (OM). An evaluation of the hardness and tensile properties was presented and correlated with the EBSD findings and FE simulations. The FE analysis results were in good agreement with the experimental finding and microstructural evolution. Processing through 4-passes produced an ultrafine-grained structure (UFG) and a recrystallized fine grain dominated the structure coupled with a geometric grain subdivision which indicated by grain refining and very high density of substructures. This reduction in grain size was coupled with an enhancement in the hardness, tensile strength by 66.6%, and 52%, respectively compared to the as-annealed counterpart. Processing through 1-pass and 2-passes resulted in a strong texture with significant rotation for the texture components whereas 4-passes processing led to losing the symmetry of the texture with significant reduction in the texture intensity.

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“…The other successful way is by improving the structure to obtain ultrafine-grained (UFG) and a large grain boundary area [5,6]. These outcomes can be reached by undertaken severe plastic deformation method (SDP) [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

On the Effect of ECAP Processing Temperature on the Microstructure, Texture Evolution and Mechanical Properties of Commercial Pure Copper

Alateyah

2021

Adv. Mater. Lett.

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Multi-Objective Optimization of Multi-Channel Spiral Twist Extrusion Process Using a Response Surface Approach and Finite Element Analysis

Cited by 3 publications

References 0 publications

Grain Structure Evolution and Mechanical Properties of Multi-Channel Spiral Twist Extruded AA5083

Grain Structure Evolution and Mechanical Properties of Multi-Channel Spiral Twist Extruded AA5083

Effect of ECAP on the Plastic Strain Homogeneity, Microstructural Evolution, Crystallographic Texture and Mechanical Properties of AA2xxx Aluminum Alloy

On the Effect of ECAP Processing Temperature on the Microstructure, Texture Evolution and Mechanical Properties of Commercial Pure Copper

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