TY - JOUR
T1 - Microstructural investigation of thermally aged nickel-based superalloy 718Plus
AU - Whitmore, Lawrence
AU - Ahmadi, Mohammad Reza
AU - Stockinger, Martin
AU - Povoden-Karadeniz, Erwin
AU - Kozeschnik, Ernst
AU - Leitner, Harald
PY - 2014
Y1 - 2014
N2 - The effects of thermal aging upon the nickel-based 718Plus superalloy are investigated and modelled. Yield strength and micro-hardness measurements are made after solution annealing and after aging at 788 °C for 4 h. In order to explain the differences in strength and hardness, a detailed investigation of the microstructure is performed using transmission electron microscopy. The size and phase fraction of the γ′ precipitates are measured and related to the measured hardness and yield strength using a theoretical model of precipitation strengthening based on the shearing of precipitates in terms of coherency strengthening and the formation of an antiphase boundary.
AB - The effects of thermal aging upon the nickel-based 718Plus superalloy are investigated and modelled. Yield strength and micro-hardness measurements are made after solution annealing and after aging at 788 °C for 4 h. In order to explain the differences in strength and hardness, a detailed investigation of the microstructure is performed using transmission electron microscopy. The size and phase fraction of the γ′ precipitates are measured and related to the measured hardness and yield strength using a theoretical model of precipitation strengthening based on the shearing of precipitates in terms of coherency strengthening and the formation of an antiphase boundary.
U2 - 10.1016/j.msea.2013.11.037
DO - 10.1016/j.msea.2013.11.037
M3 - Article
SN - 1873-4936
VL - 594
SP - 253
EP - 259
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
ER -