Microstructural Evolution of Alloy 718 at High Helium and Hydrogen Generation Rates during Irradiation with 600-800 MeV protons

Journal Article · Fri Dec 01 00:00:00 EST 2000 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/S0022-3115(00)00308-1· OSTI ID:15001678

Sencer, Bulent H ^[1]; Bond, G M ^[1]; Garner, F A ^[2]; Hamilton, M L ^[1]; Oliver, Brian M ^[3]; Thomas, L E ^[1]; Maloy, S A ^[4]; Sommer, Walter F ^[5]; James, M R ^[4]; Ferguson, P D ^[4]

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1. PNNL
2. Pacific Northwest National Laboratory
3. BATTELLE (PACIFIC NW LAB)
4. Los Alamos National Laboratory
5. LOS ALAMOS NATL LAB

When precipitation hardened Alloy 718 is irradiated with high-energy protons (600?800 MeV) and spallation neutrons at temperatures below > 60 C, it quickly hardens and loses almost all uniform elongation. It later softens somewhat at higher exposures but does not regain any elongation. This behavior is explained in terms of the evolution of Frank loop formation, disordering and eventual dissolution of the?? and?? strengthening phases, and the steady accumulation of very large levels of helium and hydrogen. These gases must be dispersed on a very fine scale in the matrix since no cavities could be found.

• Research Organization: Pacific Northwest National Lab., Richland, WA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 15001678
• Report Number(s): PNNL-SA-31666; AF5705000; TRN: US200406%%181
• Journal Information: Journal of Nuclear Materials, Vol. 283, Issue 1; Other Information: PBD: 1 Dec 2000
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
ALLOYS
CAVITIES
DISSOLUTION
ELONGATION
GASES
HELIUM
HYDROGEN
IRRADIATION
NEUTRONS
PRECIPITATION
PROTONS
SCREW DISLOCATIONS
SPALLATION