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Irradiation-Induced Extremes Create Hierarchical Face-/Body-Centered-Cubic Phases in Nanostructured High Entropy Alloys
Journal article   Open access   Peer reviewed

Irradiation-Induced Extremes Create Hierarchical Face-/Body-Centered-Cubic Phases in Nanostructured High Entropy Alloys

Li Jiang, Yong-Jie Hu, Kai Sun, Pengyuan Xiu, Miao Song, Yanwen Zhang, Walker L. Boldman, Miguel L. Crespillo, Philip D. Rack, Liang Qi, …
Advanced materials (Weinheim), v 32(39), 2002652
01 Oct 2020
PMID: 32820560
url
https://hdl.handle.net/2027.42/162803View
Published, Version of Record (VoR)Open Access (License Unspecified) Open
url
https://doi.org/10.1002/adma.202002652View
Published, Version of Record (VoR) Open

Abstract

Chemistry Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Nanoscience & Nanotechnology Physics, Applied Physics, Condensed Matter Science & Technology Science & Technology - Other Topics Materials Science Physical Sciences Physics Technology
A nanoscale hierarchical dual-phase structure is reported to form in a nanocrystalline NiFeCoCrCu high-entropy-alloy (HEA) film via ion irradiation. Under the extreme energy deposition and consequent thermal energy dissipation induced by energetic particles, a fundamentally new phenomenon is revealed, in which the original single-phase face-centered-cubic (FCC) structure partially transforms into alternating nanometer layers of a body-centered-cubic (BCC) structure. The orientation relationship follows the Nishiyama-Wasser-man relationship, that is, (011)(BCC)|| (& x2006;1 over bar 1 over bar 1)(FCC)and [100](BCC)|| [& x2006;11 over bar 0](FCC). Simulation results indicate that Cr, as a BCC stabilizing element, exhibits a tendency to segregate to the stacking faults (SFs). Furthermore, the high densities of SFs and twin boundaries in each nanocrystalline grain serve to accelerate the nucleation and growth of the BCC phase during irradiation. By adjusting the irradiation parameters, desired thicknesses of the FCC and BCC phases in the laminates can be achieved. This work demonstrates the controlled formation of an attractive dual-phase nanolaminate structure under ion irradiation and provides a strategy for designing new derivate structures of HEAs.

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Collaboration types
Domestic collaboration
Web of Science research areas
Chemistry, Multidisciplinary
Chemistry, Physical
Materials Science, Multidisciplinary
Nanoscience & Nanotechnology
Physics, Applied
Physics, Condensed Matter
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