3D finite element analysis and experimental validation of constrained groove pressing–cross route as an SPD process for sheet form metals

Khodabakhshi, F.; Abbaszadeh, M.; Mohebpour, Saeed Reza; Eskandari, H.

doi:10.1007/s00170-014-5919-z

Cited by 24 publications

(15 citation statements)

References 43 publications

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“…94 The strength increases after the first pass and further slightly decreases in the second pass. 95 However, hardness continuously increases with increasing pass numbers. The tensile strength and hardness in the sheet processed through cross CGP are higher than that of conventional CGP, especially at higher pass numbers.…”

Section: Advanced Developing Processes Of Cgpmentioning

confidence: 99%

Developing methods of constrained groove pressing technique: A review

Kumar

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Among various severe plastic deformation (SPD) techniques, constrained groove pressing (CGP) has arisen as a famous technique for fabricating ultrafine-grained sheet metals and alloys in recent times. The severe strain is applied to improve the mechanical performance and properties. However, inhomogeneous grain refinement, lower formability, surface unevenness, and microcracks are the common limitations of conventional CGP-processed samples. Therefore, this review inspects the latest progress through modifications of the CGP process and compares the process efficacy with the conventional process. Advanced CGP processing techniques, such as modification of die design, annealing of the processed sample, cross CGP, ring CGP, hybrid SPD, covered sheet casing CGP, and rubber pad CGP, are emerging techniques to up-scale the procedure and improve the grain refinement and thereby produce superior mechanical properties. In this review paper, the historic research of conventional CGP and its effect on grain refinement and mechanical properties is initially briefed and then recent progress through different advanced techniques is highlighted, especially in alloys. Albeit significant progress has been observed in CGP, the future scope and successful usage of CGP-processed samples in actual practice are discussed in the last stage.

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Section: Advanced Developing Processes Of Cgpmentioning

confidence: 99%

Developing methods of constrained groove pressing technique: A review

Kumar

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Khodabakhshi et al [71] did experimental and 3D simulation on low carbon steel sheets processed by CGP-CR at 2 passes and found that tensile strength and hardness increased from 218 MPa-426 MPa and 97 HV-176 HV respectively. Grain refinement from 30 µm to 250nm was achieved.…”

Section: Performance and Prospects Of Severe Plastic Deformation For mentioning

confidence: 99%

Performance and Prospects of Severe Plastic Deformation for Effective Biomedical Titanium Alloys

2018

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A B S T R A C TApplication of severe plastic deformation (SPD) technology to process effective biomedical titanium alloys has shown promising results at laboratory scale. However, more research is still required before adopting this technology from laboratory scale to industrial scale production. This review presents performance and prospects of SPD for effective ultra-fine/nanograin structure-biomedical titanium alloys. Effective biomedical titanium alloys should have desired properties for the medical application. The properties include; high static and fatigue strengths, surface hardness for wear resistance, good ductility, corrosion resistance and biocompatibility. Based on current works reported in the literature, the review focused on; high-pressure torsion (HPT), equal channel angular pressing (ECAP), asymmetric rolling (AR), accumulative roll bonding (ARB) and repetitive corrugation and straightening (RCS). Overview of biomedical application of titanium alloys and desired material properties is presented. A detail discussion on the working principle, performance (e.g. induced strength, hardness, grain size and texture etc.) and material deformation homogeneity of each SPD method are presented. Also, prospects and challenges of each SPD method to be implemented at industrial scale for continuous and mass production are highlighted. The review concludes with the effectiveness of SPD processes, characteristics of processed samples and suggestion of future work for SPD to process effective biomedical titanium alloys at industrial scale.

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“…They evaluated machine oil, MoS 2 , and Teflon as a lubricant and revealed that improving friction condition of the sheet-die interface makes it possible to perform more CGP passes, reach to high strain and increase the grain refinement further. Existing friction at the contact surface of sheet-die interface causes non-uniform deformation between the surface and the center of the sheet 26 and this heterogeneity in deformation leads to the creation of residual stress in the CGPed sheets.…”

Section: Introductionmentioning

confidence: 99%

Effect of the uncertainty of multi-cut contour method and friction coefficient on residual stresses of constrained groove pressing process

Nazari

Honarpisheh

Zhao

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Constrained groove pressing (CGP) process is a severe plastic deformation (SPD) method that can create ultrafine-grained microstructure in the sheet metals. In this study, residual stresses of the CGP process and the effect of the friction coefficient on the residual stresses were investigated. The residual stresses were measured in two directions using a multi-cut contour method and a mathematical-finite element model was developed to estimate the uncertainty of results of the multi-cut contour method. In order to study the effect of the friction coefficient on the residual stresses, a 3D finite element model was employed and the results of it were validated with the experimental results of the CGP process. According to the results, residual stresses in the first pass of CGP are compressive on the surface and gradually change to tension at the center of the thickness. Investigation of the effect of the first cut on the residual stresses and uncertainty of the second cutting plane showed that the effect of the first cut is only confined to regions near the intersection of the two cuts. Distancing from the intersection of two cuts causes the effect of the first cut to be ineffective on the second cut. Also, evaluation of the effect of friction coefficient on the residual stress illustrated that friction has a direct relationship with the residual stresses.

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3D finite element analysis and experimental validation of constrained groove pressing–cross route as an SPD process for sheet form metals

Cited by 24 publications

References 43 publications

Developing methods of constrained groove pressing technique: A review

Developing methods of constrained groove pressing technique: A review

Performance and Prospects of Severe Plastic Deformation for Effective Biomedical Titanium Alloys

Effect of the uncertainty of multi-cut contour method and friction coefficient on residual stresses of constrained groove pressing process

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