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Microstructure and mechanical properties of ultrafine-grained IF steel sheets produced by constrained groove pressing
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Microstructure and mechanical properties of ultrafine-grained IF steel sheets produced by constrained groove pressing
Hải Phong
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In this paper, the severe plastic deformation method (SPD) known as constrained groove pressing (CGP) was applied to produce ultrafine-grained microstructure in IF steel sheets. In the CGP technique, samples are subjected to repetitive shear deformation under the plane strain deformation condition using the constrained grooved and flat dies. | Nội dung Text Microstructure and mechanical properties of ultrafine-grained IF steel sheets produced by constrained groove pressing Engineering Solid Mechanics 8 2020 63-68 Contents lists available at GrowingScience Engineering Solid Mechanics homepage www.GrowingScience.com esm Microstructure and mechanical properties of ultrafine-grained IF steel sheets produced by constrained groove pressing Saeid Shahrakia Hadi Miyanajib and Hossein Abdollahia a Department of Mechanical Engineering University of Zabol Zabol Iran b Department of Industrial Engineering University of Louisville Louisville USA A R T I C L EI N F O ABSTRACT Article history In this paper the severe plastic deformation method SPD known as constrained groove pressing Received 8 July 2019 CGP was applied to produce ultrafine-grained microstructure in IF steel sheets. In the CGP Accepted 22 August 2019 technique samples are subjected to repetitive shear deformation under the plane strain deformation Available online condition using the constrained grooved and flat dies. For assessment of microstructure and 22 August 2019 Keywords mechanical properties of the CGPed IF steel sheet several testing such as uniaxial tensile test SPD hardness measurements scanning electron microscopy SEM and X-ray diffraction analysis have CGP been utilized. Finally it was observed that the grains are significantly refined after the 16-step Mechanical properties pressing of the interstitial free IF steel sheets. The grains were reduced from 45µm to 243 nm Microstructure after four passes. 2020 Growing Science Ltd. All rights reserved. 1. Introduction In polycrystalline materials the grain size plays a major role in establishing many crucial properties including the strength and resistance to plastic flow. In general materials with small grain sizes have several advantages over their coarse-grained counterparts because they enjoy higher strength and other favorable properties including the potential for being used in .
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