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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
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.

Type
Research Article
Copyright
Copyright © Microscopy Society of America 2013 

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References

Berbenni, S., Favier, V., Lemoie, X. & Berveiller, M. (2004). A micromechanical approach to model the bake hardening effect for low carbon steels. Script Mater 51, 303308.Google Scholar
Cerezo, A. & Davin, L. (2007). Aspects of the observation of clusters in the 3-dimensional atom probe. Surf Inter Anal 39, 184188.Google Scholar
Heinrich, A., Kassab, T. & Kirchheim, R. (2003). Investigation of the early stages of decomposition of Cu-0.7at.% Fe with the tomographic atom probe. Mater Sci Eng A 353, 9298.Google Scholar
Lee, J.M., Shibata, K., Asakura, K. & Masumoto, Y. (2002). Observation of γ→α transformation in ultralow-carbon steel under a high temperature optical microscope. ISIJ Inter 42, 11351143.Google Scholar
Miller, M.K. (2000). Atom Probe Tomography: Analysis at the Atomic Level. New York: Kluwer Academic/Plenum Press.Google Scholar
Soenen, B., De, A.K., Vandeputte, S. & De Cooman, B.C. (2004). Competition between grain boundary segregation and Cottrell atmosphere formation during static strain aging in ultra low carbon bake hardening steels. Acta Mater 52, 34833492.Google Scholar
Takahashi, M. (1974). Effect of manganese and sulfur on austenite grain size and recrystallized ferrite grain size after cold rolling of low carbon steel. ISIJ Inter 60, 501513.Google Scholar
Vasilyev, A.A., Lee, H.C. & Kuzmin, N.L. (2008). Nature of strain aging stages in bake hardening steel for automotive application. Mater Sci Eng A 485, 282289.Google Scholar
Zhang, Z., Lin, Q. & Yu, Z. (2000). Grain boundary segregation in ultra-low carbon steel. Mater Sci Eng A 291, 2226.Google Scholar