@article{d445b1c11f074b79b63fefd2219424b1,
title = "Comparing structure-property evolution for PM-HIP and forged alloy 625 irradiated with neutrons to 1 dpa",
abstract = "The nuclear power industry has growing interest in qualifying powder metallurgy with hot isostatic pressing (PM-HIP) to replace traditional alloy fabrication methods for reactor structural components. But there is little known about the response of PM-HIP alloys to reactor conditions. This study directly compares the response of PM-HIP to forged Ni-base Alloy 625 under neutron irradiation doses ∼0.5–1 displacements per atom (dpa) at temperatures ranging ∼321–385 °C. Post-irradiation examination involves microstructure characterization, ASTM E8 uniaxial tensile testing, and fractography. Up through 1 dpa, PM-HIP Alloy 625 appears more resistant to irradiation-induced cavity nucleation than its forged counterpart, and consequently experiences significantly less hardening. This observed difference in performance can be explained by the higher initial dislocation density of the forged material, which represents an interstitial-biased sink that leaves a vacancy supersaturation to nucleate cavities. These findings show promise for qualification of PM-HIP Alloy 625 for nuclear applications, although higher dose studies are needed to assess the steady-state irradiated microstructure.",
keywords = "Advanced manufacturing, Alloy 625, Electron microscopy, Neutron irradiation, Ni alloy, Powder metallurgy, Tensile testing",
author = "Caleb Clement and Sowmya Panuganti and Warren, \{Patrick H.\} and Yangyang Zhao and Yu Lu and Katelyn Wheeler and David Frazer and Guillen, \{Donna P.\} and Gandy, \{David W.\} and Wharry, \{Janelle P.\}",
note = "Funding Information: The authors thank Dr. Yaqiao Wu, Jeremy Burgener, Megha Dubey, and the staff at the Center for Advanced Energy Studies (CAES) for their assistance with microscopy and specimen handling. Additionally, the authors thank the irradiation experiment manager Katie Anderson, post-irradiation experiment manager Collin Knight, and the staff at the ATR and HFEF at Idaho National Laboratory for their assistance with ATR irradiation and post-irradiation examination. This work was supported by the Electric Power Research Institute (EPRI) . CC was partially supported by the US Nuclear Regulatory Commission through Grant 31310021M0035 . Irradiation experiments and post-irradiation examination were supported by the U.S. Department of Energy – Office of Nuclear Energy, through the Nuclear Science User Facilities (NSUF) contract 15–8242. Funding Information: The authors thank Dr. Yaqiao Wu, Jeremy Burgener, Megha Dubey, and the staff at the Center for Advanced Energy Studies (CAES) for their assistance with microscopy and specimen handling. Additionally, the authors thank the irradiation experiment manager Katie Anderson, post-irradiation experiment manager Collin Knight, and the staff at the ATR and HFEF at Idaho National Laboratory for their assistance with ATR irradiation and post-irradiation examination. This work was supported by the Electric Power Research Institute (EPRI). CC was partially supported by the US Nuclear Regulatory Commission through Grant 31310021M0035. Irradiation experiments and post-irradiation examination were supported by the U.S. Department of Energy – Office of Nuclear Energy, through the Nuclear Science User Facilities (NSUF) contract 15–8242. Publisher Copyright: {\textcopyright} 2022 The Author(s)",
year = "2022",
month = nov,
day = "1",
doi = "10.1016/j.msea.2022.144058",
language = "English",
volume = "857",
journal = "Materials Science and Engineering: A",
issn = "0921-5093",
publisher = "Elsevier Ltd",
}