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J Mater Sci Technol  2009, Vol. 25 Issue (03): 383-388    DOI:
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A Quantitative Analysis of Mn Segregation at Partitioned Ferrite/Austenite Interface in a Fe-C-Mn-Si Alloy
H. Guo, S.W. Yang, C.J.Shang, X.M. Wang, X.L. He
Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China
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Abstract  

Mn segregation at austenite/ferrite interface is studied in a Fe-C-Mn-Si alloy held at 656°C. Mn is partitioned during the growth of ferrite and as a result, a Mn pile-up exists in front of interface on the matrix side. An approach to evaluate Mn segregation quantitatively is developed by combining STEM raster window scanning and simulation of the interaction of the electron beam with the sample to subtract the contribution of Mn pile-up and obtain pure Mn segregation value. The evaluated maximum Mn interfacial segregation is in the order of a half-monolayer.

Key words:  Interfacial segregation      Phase transformation STEM      Beam broadening     
Received:  18 October 2007     
Fund: 

the National Natural Science Foundation of China under grant No. 50601002
the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.

Corresponding Authors:  Hui Guo     E-mail:  guohui@mater.ustb.edu.cn

Cite this article: 

H. Guo,S.W. Yang,C.J.Shang,X.M. Wang,X.L. He. A Quantitative Analysis of Mn Segregation at Partitioned Ferrite/Austenite Interface in a Fe-C-Mn-Si Alloy. J Mater Sci Technol, 2009, 25(03): 383-388.

URL: 

https://www.jmst.org/EN/     OR     https://www.jmst.org/EN/Y2009/V25/I03/383

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