title: Enhancing radiation tolerance by controlling defect mobility and migration pathways in multicomponent single-phase alloys.
abstract: A grand challenge in material science is to understand the correlation between intrinsic properties and defect dynamics. Radiation tolerant materials are in great demand for safe operation and advancement of nuclear and aerospace systems. Unlike traditional approaches that rely on microstructural and nanoscale features to mitigate radiation damage, this study demonstrates enhancement of radiation tolerance with the suppression of void formation by two orders magnitude at elevated temperatures in equiatomic single-phase concentrated solid solution alloys, and more importantly, reveals its controlling mechanism through a detailed analysis of the depth distribution of defect clusters and an atomistic computer simulation. The enhanced swelling resistance is attributed to the tailored interstitial defect cluster motion in the alloys from a long-range one-dimensional mode to a short-range three-dimensional mode, which leads to enhanced point defect recombination. The results suggest design criteria for next generation radiation tolerant structural alloys.
authors.affiliation: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Chenyang
authors.initials: C
authors.lastname: Lu
authors.affiliation: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Liangliang
authors.initials: L
authors.lastname: Niu
authors.affiliation: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Nanjun
authors.initials: N
authors.lastname: Chen
authors.affiliation: Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors.forename: Ke
authors.identifier: 0000-0001-7697-0466
authors.initials: K
authors.lastname: Jin
authors.affiliation: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Taini
authors.initials: T
authors.lastname: Yang
authors.affiliation: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Pengyuan
authors.initials: P
authors.lastname: Xiu
authors.affiliation: Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.|Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
authors.forename: Yanwen
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Fei
authors.initials: F
authors.lastname: Gao
authors.affiliation: Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors.forename: Hongbin
authors.identifier: 0000-0003-0283-7990
authors.initials: H
authors.lastname: Bei
authors.affiliation: Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: Shi
authors.initials: S
authors.lastname: Shi
authors.affiliation: Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: Mo-Rigen
authors.initials: MR
authors.lastname: He
authors.affiliation: Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: Ian M
authors.initials: IM
authors.lastname: Robertson
authors.affiliation: Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.|Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
authors.forename: William J
authors.identifier: 0000-0002-9017-7365
authors.initials: WJ
authors.lastname: Weber
authors.affiliation: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA.|Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Lumin
authors.initials: L
authors.lastname: Wang