Effect of Al on the NiAl-Type B2 Precipitates in Ferritic Superalloys
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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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- Effect of Al on the NiAl-Type B2 Precipitates in Ferritic Superalloys
Metallurgical and Materials Transactions A
Volume 43, Issue 10 , pp 3423-3427
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- 1. Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN, 37996-2200, USA
- 2. GE Global Research, Niskayuna, NY, USA
- 3. Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208-3108, USA
- 4. Indiana University Center for the Exploration of Energy and Matter, Bloomington, IN, 47408, USA
- 5. Physics Department, Indiana University, Bloomington, IN, 47405, USA
- 6. X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
- 7. Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA