Title: Comparison of texture evolution in low carbon steel fabricated by plane strain and multi-directional forging of the martensite starting structure

Authors: Mahdi Saalari

Addresses: Department of Metallurgy, Sirjan Branch, Islamic Azad University, Sirjan, 8915685718, Iran

Abstract: It has been clarified that deformation and annealing of martensite starting structure can produce ultrafine grained structure in low carbon steel. This study aims to investigate the texture evolution and mechanical properties of samples with martensite structure deformed by two different forging processes. The martensitic steel samples were forged by plane strain compression and multi-directional forging up to the same true strain of 2. All samples were then annealed at 450 and 550°C for 30 min. It was found that the active slip systems in BCT crystalline structure of martensite acted like ferrite steel. After multi-directional forging of martensitic steel, the yield and ultimate strength greatly increased to 1278 and 1658 MPa, respectively. During annealing, in the plane strain compressed sample, the 'oriented nucleation' and in the multi-directional forged specimen, 'selective growth' theory was dominant.

Keywords: texture evolution; martensite treatment; multi-directional forging; plane strain compression; low carbon steel; mechanical properties.

DOI: 10.1504/IJMMP.2019.103179

International Journal of Microstructure and Materials Properties, 2019 Vol.14 No.6, pp.524 - 535

Received: 28 Jan 2019
Accepted: 09 Jun 2019

Published online: 21 Oct 2019 *

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