Detection and determination of solute carbon in grain interior to correlate with the overall carbon content and grain size in ultra-low-carbon steel.
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.
School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401-331, China.
Jiling
J
Dong
Yinsheng
Y
He
Chan-Gyu
CG
Lee
Byungho
B
Lee
Jeongbong
J
Yoon
Keesam
K
Shin