Effect of Al on the NiAl-Type B2 Precipitates in Ferritic Superalloys
- First Online:
- 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
- 235 Downloads
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.