Metallurgical and Materials Transactions A

, Volume 43, Issue 10, pp 3423–3427

Effect of Al on the NiAl-Type B2 Precipitates in Ferritic Superalloys

Authors

  • Shenyan Huang
    • Department of Materials Science and EngineeringThe University of Tennessee
    • GE Global Research
  • Gautam Ghosh
    • Department of Materials Science and EngineeringNorthwestern University
  • Xin Li
    • Indiana University Center for the Exploration of Energy and Matter
    • Physics DepartmentIndiana University
  • Jan Ilavsky
    • X-Ray Science Division, Advanced Photon SourceArgonne National Laboratory
  • Zhenke Teng
    • Department of Materials Science and EngineeringThe University of Tennessee
    • Oak Ridge National Laboratory
    • Department of Materials Science and EngineeringThe University of Tennessee
Communication

DOI: 10.1007/s11661-012-1318-y

Cite this article as:
Huang, S., Ghosh, G., Li, X. et al. Metall and Mat Trans A (2012) 43: 3423. doi:10.1007/s11661-012-1318-y

Abstract

Ultra-small-angle X-ray scattering (USAXS) is employed to quantify the average size, interparticle spacing, and volume fraction of the primary B2 precipitates in Fe-based superalloys with varying Al concentration. The results are analyzed with a model incorporating polydispersity and interference effects and verified by transmission electron microscopy (TEM) characterizations. As the Al amount increases from 4 to 10 mass pct, there is an approximately 40 pct decrease in the average interparticle spacing and ~30 pct reduction in the average particle diameter.

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2012