Experimental and theoretical analysis of microstructural evolution and deformation behaviors of CuW composites during equal channel angular pressing

Chen, Wenge; Feng, Pei; Dong, Longlong; Ren, Shuxin; Fu, Yong Qing

doi:10.1016/j.matdes.2018.01.032

Cited by 18 publications

(8 citation statements)

References 51 publications

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“…Accordingly, a proper agreement was obtained between the ECAP stress and the experimental one (Figure 8a). This finding is in a good agreement with previous study [60].…”

Section: Finite Element Analysissupporting

confidence: 94%

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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“…Accordingly, a proper agreement was obtained between the ECAP stress and the experimental one (Figure 8a). This finding is in a good agreement with previous study [60].…”

Section: Finite Element Analysissupporting

confidence: 94%

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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“…Recent research has shown that the refinement of tungsten grain size can improve its mechanical properties, such as the enhancement of its ductility [9][10][11][12]. Many methods have been proposed to refine the grain size, such as equal channel angular extrusion (ECAE) [13,14], high-pressure torsion (HPT) [15,16], accumulative roll bonding (ARB) [17,18], surface mechanical attrition treatment (SMAT) [19,20], and high-energy ball milling [21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ball Milling Parameters on the Refinement of Tungsten Powder

Liang

et al. 2018

Metals

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The high-energy ball milling method was adopted to explore the influence of ball milling parameters, such as milling speed and additive amounts of process control agent (PCA) on tungsten powder. The morphology and microstructure of tungsten powder in the process of refinement were characterized by field-emission scanning electron microscope (FE-SEM), field-emission transmission electron microscope (FE-TEM), and X-ray diffractometer (XRD). Results revealed that the ball milling process and the refinement of tungsten particle and grain can be largely influenced by these two parameters. The milling efficiency was found to be highest with the milling speed of 700 rpm and additive amounts of 8% PCA. The mechanisms for the effect of these two parameters and milling time on the refinement process were discussed. Nanocrystalline tungsten powder with a particle size and grain size smaller than 100 nm was obtained, and the grain size of 5-15 nm was fabricated successfully under the highest milling efficiency conditions.

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“…Copper and copper base alloys are excellent options to achieve this properties combination; some copper base alloys can be highlighted: Cu-Mg, Cu-Cr, Al-Cu, Cu-Ag e Cu-Cr-Zr [3][4][5][6][7]. Some researchers [1,8,9] have shown that an excellent alternative to increase the strength of these alloys would be to subject them to a process of grain refinement by severe plastic deformation (SPD) [2] associated with an aging treatment.…”

Section: Introductionmentioning

confidence: 99%

Influence of microstructure on the hardness and electrical conductivity of CuCrZr alloy submitted to ECAP followed by aging and rotary swaging

Sousa,

Pires,

Cruz

et al. 2024

Matéria (Rio J.)

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Grain boundaries are fundamental in the mechanical behavior of ultrafine grain materials, especially coincidence site lattice grain boundaries (CSL-GB). This research aims to identify the influence of CSL-GB on the hardness and electrical conductivity of a CuCrZr alloy subjected to rotary swaging after having undergone severe plastic deformation via equal channel angular pressing and aging. Vickers hardness was evaluated, and electrical conductivity was measured using the 4-point technique. The average grain size and CSL-GB distribution were identified using backscattered electron diffraction. Dislocation density was measured via X-ray diffraction. At the end of the swaging processing of CuCrZr alloy with preexistent ultrafine grains, the dislocation density ceases to be the significant influencer parameter on the modification of properties, and the grain boundaries pass to be more impacting. The reduction of CSL-GB and the concomitant increase in high-angle grain boundaries can decrease hardness and electrical conductivity.

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Experimental and theoretical analysis of microstructural evolution and deformation behaviors of CuW composites during equal channel angular pressing

Cited by 18 publications

References 51 publications

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

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

Effect of Ball Milling Parameters on the Refinement of Tungsten Powder

Influence of microstructure on the hardness and electrical conductivity of CuCrZr alloy submitted to ECAP followed by aging and rotary swaging

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