NSUF 24-4874: Radiation behavior of grain boundary-decorated nanocrystalline high-entropy alloy

This work investigates the potential technological benefits of stabilized nanocrystalline high-entropy material as a new approach to improve the radiation tolerance of materials for nuclear application. As a starting point, we will study AlCoCrFe-Zr nanocrystalline alloy. The alloy is designed following a thermodynamic approach—a small amount of doping element (Zr) decorates the grain boundaries of the primary alloy (AlCoCrFe) to completely offset or reduce the excess energy there (grain boundaries). AlCoCrFe HEA will be mechanically-alloyed with Zr of low bulk solubility to develop a “forced” solid-solution and a nanocrystalline structure; this is subsequently followed by a heat treatment process that drives Zr to the GB of AlCoCrFe to establish a GB-stabilized NC AlCoCrFe-Zr alloy. This research, which will be completed within the 9-month duration of the RTE award, will help us understand the role of grain boundary decoration in the improvement of both the thermal stability and radiation response of nanocrystalline AlCoCrFe-Zr alloy. Our understanding of AlCoCrFe-Zr alloy can be translated to GB stabilization of other complex multicomponent NC alloys.

Zusätzliche Informationen

Feld	Wert
Awarded Institution	University of Calgary
Embargo End Date	2026-02-27
Facility Tech Lead	Simerjeet Gill, Wei-Ying Chen
Irradiation Facilities	Intermediate Voltage Electron Microscopy (IVEM)-Tandem Facility
NSUF Call	FY 2024 RTE 1st Call
PI	AHMED ALADE TIAMIYU
PIE Facilities	National Synchrotron Light Source II
Project Member	Dr. Simerjeet Gill, Materials Scientist - Brookhaven National Laboratory
Project Member	Dr. MEHMET TOPSAKAL, Scientist - Brookhaven National Laboratory (https://orcid.org/0000-0002-7880-0740)
Project Member	Dr. AHMED ALADE TIAMIYU, Assistant Professor - University of Calgary (https://orcid.org/0000-0003-3952-578X)
Project Type	RTE