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Detection and Determination of Solute Carbon in Grain Interior to Correlate with the Overall Carbon Content and Grain Size in Ultra-Low-Carbon Steel

Published online by Cambridge University Press:  06 August 2013

Jiling Dong ,
Yinsheng He ,
Chan-Gyu Lee ,
Byungho Lee ,
Jeongbong Yoon  and
Keesam Shin
Jiling Dong
Affiliation:
School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401-331, China School of Nano & Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
Yinsheng He
Affiliation:
School of Nano & Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
Chan-Gyu Lee
Affiliation:
School of Nano & Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
Byungho Lee
Affiliation:
POSCO, Sheet Products & Process Research Group, Technical Research Laboratories, Pohang 790-784, Korea
Jeongbong Yoon
Affiliation:
POSCO, Sheet Products & Process Research Group, Technical Research Laboratories, Pohang 790-784, Korea
Keesam Shin*
Affiliation:
School of Nano & Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
*
*Corresponding author. E-mail: [email protected]
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Abstract

In this study, every effort was exerted to determine and accumulate data to correlate microstructural and compositional elements in ultra-low-carbon (ULC) steels to variation of carbon content (12–44 ppm), manganese (0.18–0.36%), and sulfur (0.0066–0.001%). Quantitative analysis of the ULC steel using optical microscope, scanning electron microscope, transmission electron microscope, and three-dimensional atom probe revealed the decrease of grain size and dislocation density with the increase of carbon contents and/or increase of the final delivery temperature. For a given carbon content, the grain interior carbon concentration increases as the grain size increases.

Keywords

ultra-low-carbon steelsolute carbonatom by atom analysisgrain sizeTEM3DAP
Type
Research Article
Information
Microscopy and Microanalysis , Volume 19 , Supplement S5: IUMAS , August 2013 , pp. 66 - 68
Copyright
Copyright © Microscopy Society of America 2013 

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