Abstract
An optimized thermomechanical treatment (TMT) applied to austenitic alloy 800H (Fe-21Cr-32Ni) had shown significant improvements in corrosion resistance and basic mechanical properties. This study examined its effect on radiation resistance by irradiating both the solution-annealed (SA) and TMT samples at 500 °C for 3 dpa. Microstructural characterization using transmission electron microscopy revealed that the radiation-induced Frank loops, voids, and γ′-Ni3(Ti,Al) precipitates had similar sizes between the SA and TMT samples. The amounts of radiation-induced defects and more significantly γ′ precipitates, however, were reduced in the TMT samples. These reductions would approximately reduce by 40.9% the radiation hardening compared to the SA samples. This study indicates that optimized-TMT is an economical approach for effective overall property improvements.
Original language | English |
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Pages (from-to) | 70-74 |
Number of pages | 5 |
Journal | Journal of Nuclear Materials |
Volume | 437 |
Issue number | 1-3 |
DOIs | |
State | Published - 2013 |
Funding
This research was sponsored by the U.S. Department of Energy (DOE), Office of Nuclear Energy, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. Research supported in part by ORNL’s Shared Research Equipment (ShaRE) User Facility, which is sponsored by the Office of Basic Energy Sciences, U.S. DOE.