Metallurgical and Materials Transactions A

, Volume 43, Issue 10, pp 3423–3427 | Cite as

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

  • Shenyan Huang
  • Gautam Ghosh
  • Xin Li
  • Jan Ilavsky
  • Zhenke Teng
  • Peter K. Liaw


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.


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Copyright information

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

Authors and Affiliations

  • Shenyan Huang
    • 1
    • 2
  • Gautam Ghosh
    • 3
  • Xin Li
    • 4
    • 5
  • Jan Ilavsky
    • 6
  • Zhenke Teng
    • 1
    • 7
  • Peter K. Liaw
    • 1
  1. 1.Department of Materials Science and EngineeringThe University of TennesseeKnoxvilleUSA
  2. 2.GE Global ResearchNiskayunaUSA
  3. 3.Department of Materials Science and EngineeringNorthwestern UniversityEvanstonUSA
  4. 4.Indiana University Center for the Exploration of Energy and MatterBloomingtonUSA
  5. 5.Physics DepartmentIndiana UniversityBloomingtonUSA
  6. 6.X-Ray Science Division, Advanced Photon SourceArgonne National LaboratoryArgonneUSA
  7. 7.Oak Ridge National LaboratoryOak RidgeUSA

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