J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (03): 383-388.

• Research Articles • 上一篇    下一篇

A quantitative analysis of Mn segregation at partitioned ferrite /austenite interface in a Fe-C-Mn-Si alloy

Hui Guo1;Yang2;Shang2;Wang2;He2   

  1. 1. University of Science and Technology Beijing
    2.
  • 收稿日期:2007-10-18 修回日期:2009-01-09 出版日期:2009-05-28 发布日期:2009-10-10
  • 通讯作者: Hui Guo
  • 基金资助:

    国家自然科学基金;教育部留学回国人员科研启动基金资助项目;国家自然科学基金;教育部留学回国人员科研启动基金资助项目

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   

  1. Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2007-10-18 Revised:2009-01-09 Online:2009-05-28 Published:2009-10-10
  • Contact: Hui Guo
  • Supported by:

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

关键词: Interfacial segregation, phase

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