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Metals 2015, 5(3), 1315-1327; doi:10.3390/met5031315

High Temperature Flow Response Modeling of Ultra-Fine Grained Titanium

Mechanical Engineering Department, Ozyegin University, Istanbul 34794, Turkey
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Author to whom correspondence should be addressed.
Academic Editor: Heinz Werner Höppel
Received: 14 May 2015 / Revised: 1 July 2015 / Accepted: 14 July 2015 / Published: 22 July 2015
(This article belongs to the Special Issue Ultrafine-grained Metals)
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Abstract

This work presents the mechanical behavior modeling of commercial purity titanium subjected to severe plastic deformation (SPD) during post-SPD compression, at temperatures of 600-900 °C and at strain rates of 0.001-0.1 s−1. The flow response of the ultra-fine grained microstructure is modeled using the modified Johnson-Cook model as a predictive tool, aiding high temperature forming applications. It was seen that the model was satisfactory at all deformation conditions except for the deformation temperature of 600 °C. In order to improve the predictive capability, the model was extended with a corrective term for predictions at temperatures below 700 °C. The accuracy of the model was displayed with reasonable agreement, resulting in error levels of less than 5% at all deformation temperatures. View Full-Text
Keywords: severe plastic deformation; titanium; equal channel angular extrusion/pressing; high temperature; ultra-fine grained; Johnson-Cook model severe plastic deformation; titanium; equal channel angular extrusion/pressing; high temperature; ultra-fine grained; Johnson-Cook model
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sajadifar, S.V.; Yapici, G.G. High Temperature Flow Response Modeling of Ultra-Fine Grained Titanium. Metals 2015, 5, 1315-1327.

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