TY - GEN
T1 - Correlating small angle scattering spectra to electrical resistivity changes in a nickel-base superalloy
AU - Whelchel, Ricky L.
AU - Kelekanjeri, V. S.K.G.
AU - Gerhardt, Rosario A.
AU - Ilavsky, Jan
AU - Littrell, Ken C.
PY - 2010
Y1 - 2010
N2 - Waspaloy specimens aged at 800°C from 0.5h to 88.5h were evaluated via small angle neutron scattering (SANS), ultra small angle X-ray scattering (USAXS), electrical resistivity, and SEM. The average γ′ precipitate size and volume fraction, obtained from modeling the small angle scattering data, was used to calculate a figure of merit of electron scattering. This figure of merit is designed to correlate the electron scattering ability of the material to the precipitate microstructure. The USAXS data shows a secondary precipitate population at smaller diameters that is absent from the SANS data, since the SANS measurements were not obtained at high enough values of Q. It is believed that this secondary population makes the USAXS-derived figure of merit more sensitive to the actual measured resistivity response than the SANS-derived values; however, the SANS derived primary precipitate sizes are believed to more accurate due to a larger sample volume.
AB - Waspaloy specimens aged at 800°C from 0.5h to 88.5h were evaluated via small angle neutron scattering (SANS), ultra small angle X-ray scattering (USAXS), electrical resistivity, and SEM. The average γ′ precipitate size and volume fraction, obtained from modeling the small angle scattering data, was used to calculate a figure of merit of electron scattering. This figure of merit is designed to correlate the electron scattering ability of the material to the precipitate microstructure. The USAXS data shows a secondary precipitate population at smaller diameters that is absent from the SANS data, since the SANS measurements were not obtained at high enough values of Q. It is believed that this secondary population makes the USAXS-derived figure of merit more sensitive to the actual measured resistivity response than the SANS-derived values; however, the SANS derived primary precipitate sizes are believed to more accurate due to a larger sample volume.
UR - https://www.scopus.com/pages/publications/78650334861
U2 - 10.1557/proc-1262-w10-05
DO - 10.1557/proc-1262-w10-05
M3 - Conference contribution
AN - SCOPUS:78650334861
SN - 9781605112398
T3 - Materials Research Society Symposium Proceedings
SP - 145
EP - 150
BT - In-Situ and Operando Probing of Energy Materials at Multiscale Down to Single Atomic Column - The Power of X-Rays, Neutrons and Electron Microscopy
PB - Materials Research Society
ER -