Correlation between poly-modal grain size and peculiar mechanical properties of pure aluminum deformed by RCSR process

Mirab, Saeideh; Nili‐Ahmadabadi, Mahmoud; Khajezade, Ali; Jafarian, H.R.

doi:10.1016/j.msea.2017.06.021

Cited by 6 publications

(3 citation statements)

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“…They reported the production of a non-uniform grain size distribution in pure aluminum, in which the yield strength (YS) increased from 21 MPa to 52 MPa after 1 cycle, reaching the maximum YS of 82 MPa at 8 cycles. It was also reported that the ductility drastically decreased in the first cycle (~17%), but a gradual improvement at 20 cycles was observed, reaching a ductility rather close to that of the annealed condition (~38%) [10].…”

Section: Introductionmentioning

confidence: 82%

“…It has been proposed that by means of the generation of a deformation gradient in the microstructure, a combination of high strength and ductility can be achieved. This was done by a confined grain growth of the nanostructure, created by means of the SPD technique [10,11]. For that purpose, Mirab et al [10] employed a derivation of the RCS process, called repetitive corrugation and straightening by rolling (RCSR), which was developed by Mirsepasi et al [12].…”

Section: Introductionmentioning

confidence: 99%

“…This was done by a confined grain growth of the nanostructure, created by means of the SPD technique [10,11]. For that purpose, Mirab et al [10] employed a derivation of the RCS process, called repetitive corrugation and straightening by rolling (RCSR), which was developed by Mirsepasi et al [12]. They reported the production of a non-uniform grain size distribution in pure aluminum, in which the yield strength (YS) increased from 21 MPa to 52 MPa after 1 cycle, reaching the maximum YS of 82 MPa at 8 cycles.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural Evolution and Mechanical Behavior of an Al-6061 Alloy Processed by Repetitive Corrugation and Straightening

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Ezequiel

Figueroa

et al. 2020

Metals

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The repetitive corrugation and straightening process is a severe plastic deformation technique that is particularly suited to process metallic sheets. With this technique, it is possible to develop nano/ultrafine-grained structured materials, and therefore, to improve some mechanical properties such as the yield strength, ultimate tensile strength, and fatigue lifetime. In this study, an Al-6061 alloy was subjected to the repetitive corrugation and straightening process. A new corrugation die design was proposed in order to promote a heterogeneous deformation into the metallic sheet. The evolution of the mechanical properties and microstructure obtained by electron backscatter diffraction of the alloy showed a heterogeneous distribution in the grain size at the initial cycles of the repetitive corrugation and straightening process. Uniaxial tensile tests showed a significant increase in yield strength as the number of repetitive corrugation and straightening passes increased. The distribution of the plastic deformation was correlated with the hardness distribution on the surface. The hardness distribution map matched well with the heterogeneous distribution of the plastic deformation obtained by finite element simulation. A maximum average hardness (147 HV) and yield strength (385 MPa) was obtained for two repetitive corrugation and straightening cycles sample.

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Section: Introductionmentioning

confidence: 82%