Thermomechanical treatment for improved neutron irradiation resistance of austenitic alloy (Fe-21Cr-32Ni)

L. Tan, J. T. Busby, H. J.M. Chichester, K. Sridharan, T. R. Allen

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

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 languageEnglish
Pages (from-to)70-74
Number of pages5
JournalJournal of Nuclear Materials
Volume437
Issue number1-3
DOIs
StatePublished - 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.

Fingerprint

Dive into the research topics of 'Thermomechanical treatment for improved neutron irradiation resistance of austenitic alloy (Fe-21Cr-32Ni)'. Together they form a unique fingerprint.

Cite this