Deformation field and texture analysis in T-ECAP using a flow function

Hasani, Arman; Sepsi, Máté; Feyzi, S.; Tóth, László

doi:10.1016/j.matchar.2021.110912

Cited by 10 publications

(4 citation statements)

References 29 publications

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“…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]. Within ECAP, a processed sample (ECAPed), which has a high shear strain, consists with two intersecting channels of equal cross-sections intersecting at a channel angle Φ and with a curvature angle Ψ [41] as shown in Figure 1, experiences a considerable amount of shear strain during processing in the ECAP die.…”

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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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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“…The inverse engineering method can deduce the thermo-mechanical history from the texture. This method is commonly used to characterize the process in non-conventional metal-forming technologies, such as severe plastic deformation (SPD) (Beyerlein & To ´th, 2009;Hasani et al, 2021) or the annealing process after SPD (Sandim et al, 2014). A distinct area of archaeometry also uses this approach, inferring the production method from the texture of archaeological metal artefacts (Artioli, 2007).…”

Section: Introductionmentioning

confidence: 99%

Non-destructive texture characterization by a robot-arm-driven X-ray diffractometer

Sepsi,

Benke,

Mertinger

2024

J Appl Cryst

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The most common methods for texture characterization require cutting a coupon to be inserted into an X-ray texture goniometer or an electron microscope and are, therefore, destructive. However, there are many cases where texture characterization needs to be performed in a non-destructive way, where the measurement can be made without damaging the object. Typical examples are archaeological artefacts or very expensive materials. Here we demonstrate the application of an X-ray diffractometer mounted on a robotic arm designed for residual stress scanning for texture characterization, enabling the determination of the orientation distribution function for different locations on samples with complex geometries. The texture characterization method was benchmarked on a cold-rolled aluminium sheet.

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“…Considering the characteristic of the die, the deformation mechanism and metal ow behavior in region I is actually similar to T-ECAP process [38], which is considered as two back to back typical channel angular extrusion processes as shown in Fig. 2(b) like ECAP process [39].…”

Section: Introductionmentioning

confidence: 99%

Novel process combined extrusion and severe plastic deformation for plate component with rib-web structure of magnesium alloys

Zhu

Sun

Qian

et al. 2022

Int J Adv Manuf Technol

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Plates with rib-web structure of magnesium alloys can hardly fabricated through conventional method. In this work, the variable circular channel angular extrusion (VCCAE) combined extrusion and severe plastic deformation is proposed, in which billet undergoes severe deformation at several variable circular angular channel. The FE model for VCCAE of scaling plate with ribs is established and the experimental set up is designed. The feasibility of the novel process and the accuracy of the FE model are validated by the simulations and experiments. Stress state and the effective strain distribution in longitudinal section and cross section are analyzed. The results show that stress and strain distribution in longitudinal section is extremely inhomogeneous, and obvious stress concentration at the shear plane is founded. The microstructure in angular region is more uniform and ner, which validate that the severe shear deformation induced by the angular channel in the VCCAE process could promote the deformation uniformity and grain re nement. The results of numerical simulation and experiments demonstrate that the VCCAE process proposed in this paper is feasible and it has great potential to manufacture highperformance plate with ribs.

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Deformation field and texture analysis in T-ECAP using a flow function

Cited by 10 publications

References 29 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

Non-destructive texture characterization by a robot-arm-driven X-ray diffractometer

Novel process combined extrusion and severe plastic deformation for plate component with rib-web structure of magnesium alloys

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