Structure and Mechanical Properties of Steel in the Process “Pressing–Drawing”

Naizabekov, Abdrakhman; Volokitina, Irina; Volokitin, Andrey; Panin, Evgeniy

doi:10.1007/s11665-019-3880-6

Cited by 30 publications

(12 citation statements)

References 19 publications

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“…The metal flow nonmonotonicity will also play a significant role here. The UFG forming conditions implementation is easy for the discrete processes such as pressing (equal channel angular pressing—ECAP) [ 7 , 8 , 9 ], forging [ 10 ], and high-pressure torsion (HPT) [ 6 , 11 ], but production complications solving is relevant for the long-length products with inevitable tensile stresses, such as rolling [ 12 ] or drawing [ 13 ]. The best improvement effect can be given by the vortex metal flow implementation under the all-round hydrostatic compression conditions [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Obtaining an Equiaxed Ultrafine-Grained State of the Longlength Bulk Zirconium Alloy Bars by Extralarge Shear Deformations with a Vortex Metal Flow

et al. 2023

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The method of radial shear rolling makes it possible to achieve comparable to high pressure torsion (HPT) method ultrahigh degrees of total strain level in combination with the vortex metal flow character for long-length large bulk bars unable by HPT and many other processes of sever plastic deformation (SPD). Sequential rolling of the Zr-1%Nb alloy was carried out under extreme conditions on two radial shear rolling mills with a total diameter reduction ε = 185% and a maximum total strain level = 46 mm/mm. The strain level and its cross-section distribution assessment by finite element method (FEM) simulation was studied. The final bar cross-section structure type distribution detailed study 1 mm resolution by electron back scatter diffraction (EBSD) mapping was performed. A gradient structure with a predominance of the equiaxed ultrafine-grained (UFG) state was found. The deformation level rising did not allow to refine it in the periphery zone more than that obtained nearly middle of the processing, but it allows for significant change in the axial zone structure. The additional large warm deformations by radial shear rolling have no additional grain refinement effect for already 300–600 nm refined zone. An equiaxed UFG structure was obtained in a relatively large volume of the sample with a reduced gradient towards the non-UFG center zone in regard to known works.

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Section: Introductionmentioning

confidence: 99%

Obtaining an Equiaxed Ultrafine-Grained State of the Longlength Bulk Zirconium Alloy Bars by Extralarge Shear Deformations with a Vortex Metal Flow

et al. 2023

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“…Therefore, the search for high-performance schemes for the formation of UFG structures in metals based on traditional metal forming processes is an important stage in the further development of SPD processes. A special place among these methods is occupied by the "equal-channel angular pressing-drawing" (ECAP-drawing) combined process [20][21][22]. Its key feature is that, unlike other combined methods, there is no rolling stage here.…”

Section: Introductionmentioning

confidence: 99%

Icrostructure Evolution of Steel-Aluminum Wire During Deformation by "Equal-Channel Angular Pressing-Drawing"method

Volokitina.¹

2022

Eurasian phys. tech. j.

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During experimental studies of the equal-channel angular pressing-drawing effect on the microstructure evolution and mechanical properties change, the principal possibility and effectiveness of using the proposed continuous method for forming an ultrafine-grained structure and increasing the strength properties of steel-aluminum wire was proved. The deformation was carried out at ambient temperature in three passes. It is shown that both layers of bimetallic wire are processed unevenly. An aluminum shell with an initial grain size of 22 microns was processed up to 2 microns. The steel core has a different grain size in the transverse and longitudinal sections. With an initial grain size of 18 microns, after deformation the grain size is about 10 microns in the longitudinal section and 8 microns in the transverse section.

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“…Further development of the scientific direction related to severe plastic deformation is associated with the development of new innovative methods for producing long-length products from ferrous and non-ferrous metals with an ultrafine-grained structure. These methods include: Conform method [22,23]; equal-channel angular sheet drawing [24]; combined processes "ECAP-drawing" [25], "rolling-ECAP" [26] and many others.…”

Section: Introductionmentioning

confidence: 99%

Realization of the innovative potential of radial-shear rolling for forming the structure and mechanical properties of AISI-321 austenitic stainless steel

et al. 2021

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In this paper the grain structure and mechanical properties of AISI-321 austenitic stainless steel subjected to 7 passes of radial-shear rolling at 1000 °С were investigated. The tensile strength (1076 MPa) and Vickers microhardness (322 HV) after 7 passes increased by 2.2 times and 2 times, respectively, relative to the initial annealed state (480 MPa, 160 HV). Ultra-fine grained structure (200-700 nm) formed in the bar section area from its surface to a depth of 0.25 of the radius. The transition zone is located in the area between 0.5 R and 0.25 R of the bar section. Anything deeper is a rolling texture. The 7-pass radial-shear rolling process is an effective way to form UFG structure and improved mechanical properties in AISI-321 austenitic stainless steel.

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Structure and Mechanical Properties of Steel in the Process “Pressing–Drawing”

Cited by 30 publications

References 19 publications

Obtaining an Equiaxed Ultrafine-Grained State of the Longlength Bulk Zirconium Alloy Bars by Extralarge Shear Deformations with a Vortex Metal Flow

Obtaining an Equiaxed Ultrafine-Grained State of the Longlength Bulk Zirconium Alloy Bars by Extralarge Shear Deformations with a Vortex Metal Flow

Icrostructure Evolution of Steel-Aluminum Wire During Deformation by "Equal-Channel Angular Pressing-Drawing"method

Realization of the innovative potential of radial-shear rolling for forming the structure and mechanical properties of AISI-321 austenitic stainless steel

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