Microstructure Characteristics and Identification of Low-Carbon Steels Fabricated by Controlled Rolling and Accelerated Cooling Processes

Sang-In Lee; Tae-Woon Hong; Byoungchul Hwang

doi:10.3740/MRSK.2017.27.11.636

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2017 Vol.27, Issue 11 Preview Page

Microstructure Characteristics and Identification of Low-Carbon Steels Fabricated by Controlled Rolling and Accelerated Cooling Processes 제어 압연과 가속 냉각에 의해 저탄소강에서 형성되는 미세조직의 특징과 구분

November 2017. pp. 636-642

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Abstract

In the present study the microstructure of low-carbon steels fabricated by controlled rolling and accelerated cooling processes was characterized and identified based on various microstructure analysis methods including optical and scanning electron microscopy, and electron backscatter diffraction(EBSD). Although low-carbon steels are usually composed of α-ferrite and cementite(Fe₃C) phases, they can have complex microstructures consisting of ferrites with different size, morphology, and dislocation density, and secondary phases dependent on rolling and accelerated cooling conditions. The microstructure of lowcarbon steels investigated in this study was basically classified into polygonal ferrite, acicular ferrite, granular bainite, and bainitic ferrite based on the inverse pole figure, image quality, grain boundary, kernel average misorientation(KAM), and grain orientation spread(GOS) maps, obtained from EBSD analysis. From these results, it can be said that the EBSD analysis provides a valuable tool to identify and quantify the complex microstructure of low-carbon steels fabricated by controlled rolling and accelerated cooling processes.

Keywords

low-carbon steel

microstructure

electron backscatter diffraction(EBSD)

identification

controlled rolling

accelerated cooling

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 27
No :11
Pages :636-642
Received Date : 2017-09-25
Revised Date : 2017-10-11
Accepted Date : 2017-10-11
DOI :https://doi.org/10.3740/MRSK.2017.27.11.636

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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