J Mater Sci Technol ›› 2011, Vol. 27 ›› Issue (8): 725-728.

• Modeling and Simulations • Previous Articles     Next Articles

Modeling of Nucleation and Growth of M23C6 Carbide in Multi-component Fe-based Alloy

Naqiong Zhu1), Yanlin He1), Wenqing Liu1), Lin Li1), Shuigen Huang2), Jef Vleugels2), Omer Van der Biest2)   

  1. 1) Department of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
    2) Department of Metallurgy and Materials Engineering, Katholieke Uniersiteit Leuven, Kasteelpark Arenberg 44, B-3001 Heverlee, Belgium
  • Received:2010-09-29 Revised:2010-12-23 Online:2011-08-30 Published:2011-08-30
  • Contact: Yanlin He
  • Supported by:

    the National Natural Science Foundation of China (Nos. 50971137 and 50934011)

Abstract: Three-dimensional atom probe (3DAP) technique has been used to study the nucleation and growth of  M23C6 carbide in a supersaturated multi-component Fe-based alloy aged at 800°C. 3D images indicate that the radius of  M23C6  carbide after ageing for 10 min is about 9 nm. Concentration profiles of alloy elements in the carbide are also obtained. Combined with PANDAT and Thermo-Calc software, attempts to model the early stages of precipitation are present. The calculated particle size and composition of  M23C6  carbide is in good agreement with 3DAP data.

Key words: Nucleation and growth, M23C6, Three-dimensional atom probe (3DAP), Modeling