Low activation, refractory, high entropy alloys for nuclear applications
A Kareer, JC Waite, B Li, A Couet, DEJ Armstrong, AJ Wilkinson
TL;DR
This paper introduces two new low activation high entropy alloys, TiVZrTa and TiVCrTa, designed for nuclear applications, demonstrating their comparable hardness and improved irradiation resistance after heavy ion implantation.
Contribution
The study develops and characterizes two novel low activation HEAs with enhanced irradiation resistance for nuclear reactor use.
Findings
Alloys exhibit similar hardness and modulus to TiVNbTa in as-cast state.
Heavy ion implantation increases irradiation resistance of the new alloys.
New alloys are suitable for in-core nuclear structural applications.
Abstract
Two new, low activation high entropy alloys (HEAs) TiVZrTa and TiVCrTa are studied for use as in-core, structural nuclear materials for in-core nuclear applications. Low-activation is a desirable property for nuclear reactors, in an attempt to reduce the amount of high level radioactive waste upon decommissioning, and for consideration in fusion applications.The alloy TiVNbTa is used as a starting composition to develop two new HEAs; TiVZrTa and TiVCrTa. The new alloys exhibit comparable indentation hardness and modulus, to the TiVNbTa alloy in the as-cast state. After heavy ion implantation the new alloys show an increased irradiation resistance.
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