TY - JOUR
T1 - Boron segregation to austenite grain boundary in low alloy steel measured by aberration corrected STEM-EELS
AU - Shigesato, Genichi
AU - Fujishiro, Taishi
AU - Hara, Takuya
PY - 2012/10/30
Y1 - 2012/10/30
N2 - Boron concentration profile around prior austenite grain boundaries in Fe-0.05C-0.5Mo-0.001B (mass%) is examined by using aberration corrected STEM-EELS. Tilt series measurements of line analysis with a thin specimen (<30. nm) and the principal component analysis (PCA) are performed to obtain the precise distribution of boron around the boundary. The concentration on the grain boundary reaches beyond 8. at% and the distribution width is about 1.2. nm. The effects of the boundary inclination and the specimen thickness are also examined by calculation based on the Gaussian broadening model. The obtained concentration profile implies that the boron segregation in the present material is formed by 'non-equilibrium segregation mechanism'.
AB - Boron concentration profile around prior austenite grain boundaries in Fe-0.05C-0.5Mo-0.001B (mass%) is examined by using aberration corrected STEM-EELS. Tilt series measurements of line analysis with a thin specimen (<30. nm) and the principal component analysis (PCA) are performed to obtain the precise distribution of boron around the boundary. The concentration on the grain boundary reaches beyond 8. at% and the distribution width is about 1.2. nm. The effects of the boundary inclination and the specimen thickness are also examined by calculation based on the Gaussian broadening model. The obtained concentration profile implies that the boron segregation in the present material is formed by 'non-equilibrium segregation mechanism'.
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U2 - 10.1016/j.msea.2012.06.099
DO - 10.1016/j.msea.2012.06.099
M3 - Article
AN - SCOPUS:84865408384
SN - 0921-5093
VL - 556
SP - 358
EP - 365
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
ER -