TY - GEN
T1 - Structure-property relationships in Waspaloy via small angle scattering and electrical resistivity, measurements
AU - Whelchel, Ricky L.
AU - Gerhardt, Rosario A.
AU - Littrell, Ken
PY - 2010
Y1 - 2010
N2 - Particle size distributions of γ′ phase were obtained for Waspaloy specimens aged at 725°C and 800°C for times ranging from 120 s to approximately 1×106 s through fitting small angle neutron scattering (SANS) spectra with a volume distribution of spherical precipitates. The average precipitate radius is found to increase progressively with both aging time and temperature. Electrical resistivity measurements for the aged Waspaloy specimens show an initial increase reaching a maximum at short aging times, followed by a decrease in resistivity with increasing aging time after the resistivity peak. The electrical response was modeled utilizing a microstructural model that accounts for conduction electron scattering from both precipitates and solute atoms. The microstructural model shows a good fit to the measured electrical resistivity, indicating its validity for predicting the electrical response in aged Waspaloy. These results suggest that the electrical response due to aging may be used to quantitatively obtain precipitate microstructural information in Waspaloy in a non-destructive fashion.
AB - Particle size distributions of γ′ phase were obtained for Waspaloy specimens aged at 725°C and 800°C for times ranging from 120 s to approximately 1×106 s through fitting small angle neutron scattering (SANS) spectra with a volume distribution of spherical precipitates. The average precipitate radius is found to increase progressively with both aging time and temperature. Electrical resistivity measurements for the aged Waspaloy specimens show an initial increase reaching a maximum at short aging times, followed by a decrease in resistivity with increasing aging time after the resistivity peak. The electrical response was modeled utilizing a microstructural model that accounts for conduction electron scattering from both precipitates and solute atoms. The microstructural model shows a good fit to the measured electrical resistivity, indicating its validity for predicting the electrical response in aged Waspaloy. These results suggest that the electrical response due to aging may be used to quantitatively obtain precipitate microstructural information in Waspaloy in a non-destructive fashion.
KW - Electrical resistivity
KW - Non-destructive testing
KW - Small angle scattering
KW - Waspaloy
UR - https://www.scopus.com/pages/publications/79960998919
U2 - 10.1002/9781118495223.ch65
DO - 10.1002/9781118495223.ch65
M3 - Conference contribution
AN - SCOPUS:79960998919
SN - 9781617827709
T3 - 7th International Symposium on Superalloy 718 and Derivatives 2010
SP - 847
EP - 858
BT - 7th International Symposium on Superalloy 718 and Derivatives 2010
PB - John Wiley and Sons Inc.
ER -