TY - JOUR
T1 - Microstructure evolution in austenitic Fe-Cr-Ni alloys irradiated with rotons
T2 - Comparison with neutron-irradiated microstructures
AU - Gan, J.
AU - Was, G. S.
N1 - Funding Information:
The authors would like to thank Jeremy Busby, Matt Daniel, Todd Allen, John Cookson and other members in the IASCC group at the University of Michigan for their support through the experiment and discussion. Special thanks to Dr Danny Edwards and Dr Stephen Bruemmer at the Pacific Northwest National Laboratory for their support and contribution to this work. The authors are grateful to Dr Victor Roterbug for his help on the proton-irradiation at the Michigan Ion Beam Laboratory. This work was supported by the EPRI under contract number WO4068-26, US Department of Energy under grant DE-FG02-93ER-12310 at the University of Michiganand the Material Science Branch of the Office of Basic Energy Science, US Department of Energy, under contract DE-ACO6-76RL0 1830 with Battelle Memorial Institute.
PY - 2001/8
Y1 - 2001/8
N2 - Irradiation-induced microstructures of high purity and commercial purity austenitic stainless steels were investigated using proton-irradiation. For high purity alloys, Fe-20Cr-9Ni (HP 304 SS), Fe-20Cr-24Ni and Ni-18Cr-9Fe were irradiated using 3.2 MeV protons between 300°C and 600°C at a dose rate of 7 × 10-6 dpa/s to doses up to 3.0 dpa. The commercial purity alloys, CP 304 SS and CP 316 SS were irradiated at 360°C to doses between 0.3 and 5.0 dpa. The dose, temperature and composition dependence of the number density and size of dislocation loops and voids were characterized. The changes in yield strength due to irradiation were estimated from Vickers hardness measurements and compared to calculations using a dispersed-barrier-hardening (DBH) model. The dose and temperature dependence of proton-irradiated microstructure (loops, voids) and the irradiation hardening are consistent with the neutron-data trend. Results indicate that proton-irradiation can accurately reproduce the microstructure of austenitic alloys irradiated in LWR cores.
AB - Irradiation-induced microstructures of high purity and commercial purity austenitic stainless steels were investigated using proton-irradiation. For high purity alloys, Fe-20Cr-9Ni (HP 304 SS), Fe-20Cr-24Ni and Ni-18Cr-9Fe were irradiated using 3.2 MeV protons between 300°C and 600°C at a dose rate of 7 × 10-6 dpa/s to doses up to 3.0 dpa. The commercial purity alloys, CP 304 SS and CP 316 SS were irradiated at 360°C to doses between 0.3 and 5.0 dpa. The dose, temperature and composition dependence of the number density and size of dislocation loops and voids were characterized. The changes in yield strength due to irradiation were estimated from Vickers hardness measurements and compared to calculations using a dispersed-barrier-hardening (DBH) model. The dose and temperature dependence of proton-irradiated microstructure (loops, voids) and the irradiation hardening are consistent with the neutron-data trend. Results indicate that proton-irradiation can accurately reproduce the microstructure of austenitic alloys irradiated in LWR cores.
UR - http://www.scopus.com/inward/record.url?scp=0035426642&partnerID=8YFLogxK
U2 - 10.1016/S0022-3115(01)00615-8
DO - 10.1016/S0022-3115(01)00615-8
M3 - Article
AN - SCOPUS:0035426642
SN - 0022-3115
VL - 297
SP - 161
EP - 175
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 2
ER -