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ECAP (Equal Channel Angular Pressing) process on 316L stainless steel was done using two different channel angles 120° and 126° after all samples were heat treated. Optical microscope analysis, hardness test and electrochemical measurement were performed for three conditions samples; before ECAP (BE), 120° ECAP and 126° ECAP. Optical analysis shows that the grain size for both 120° ECAP and 126° ECAP samples had refined with an elongated grain. However, 120° ECAP shows a slightly better refinement than 126° ECAP. In hardness test results, 120° ECAP and 126° ECAP has 27.67% and 28.84% hardness increment, respectively. In the electrochemical test results, current density (Icorr) is reduced by 120° ECAP and 126° ECAP in both conditions tested (0.9%NaCl and E-MEM+10%NCS), but 120° ECAP improves better than 126° ECAP for both conditions. As a conclusion, 120° ECAP shows the best performance in these three testing but almost to 126° ECAP results. Therefore, by increasing small value of ECAP die angle will not obviously change the mechanical properties and corrosion behavior outcomes in fact the ECAP pressing force become lower.

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  This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in (citation of published article) and may be found at https://doi.org/10.1063/5.0078675.

Keyword: severe plastic deformation, SS316L, Vickers hardness, polarization curve, nanograined

Date published: 2022-06-13

Publisher: AIP Publishing

Journal:

• AIP Conference Proceedings (ISSN: 0094243X) vol. 2454 issue. 1 060037

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Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4746

First published URL: https://doi.org/10.1063/5.0078675

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Updated at: 2024-09-13 12:30:20 +0900

Published on MDR: 2024-09-13 12:30:20 +0900