Effects of temperature on the irradiation responses of Al0.1CoCrFeNi high entropy alloy

Tengfei Yang; Songqin Xia; Wei Guo; Rong Hu; Jonathan D. Poplawsky; Gang Sha; Yuan Fang; Zhanfeng Yan; Chenxu Wang; Congyi Li; Yong Zhang; Steven J. Zinkle; Yugang Wang

doi:10.1016/j.scriptamat.2017.09.025

Effects of temperature on the irradiation responses of Al_0.1CoCrFeNi high entropy alloy

Tengfei Yang
, Songqin Xia
, Wei Guo
, Rong Hu
, Jonathan D. Poplawsky
, Gang Sha
, Yuan Fang
, Zhanfeng Yan
, Chenxu Wang
, Congyi Li
, Yong Zhang
, Steven J. Zinkle
, Yugang Wang

Materials MicroAnalysis

Research output: Contribution to journal › Article › peer-review

144 Scopus citations

Abstract

Structural damage and chemical segregation in Al_0.1CoCrFeNi high entropy alloy irradiated at elevated temperatures are studied using transmission electron microscopy (TEM) and atom probe tomography (APT). Irradiation-induced defects include dislocation loops, long dislocations and stacking-fault tetrahedra, but no voids can be observed. As irradiation temperature increases, defect density is decreased but defect size is increased, which is induced by increasing defect mobility. APT characterization reveals that ion irradiation at elevated temperatures can induce an enrichment of Ni and Co as well as a depletion of Fe and Cr at defect clusters, mainly including dislocation loops and long dislocations.

Original language	English
Pages (from-to)	31-35
Number of pages	5
Journal	Scripta Materialia
Volume	144
DOIs	https://doi.org/10.1016/j.scriptamat.2017.09.025
State	Published - Feb 2018

Funding

This work was financially supported in part by the Office of Fusion Energy, U.S. Department of Energy (grant # DE-SC0006661 ), the National Magnetic Confinement Fusion Energy Research Project 2015GB113000 and the National Natural Science Foundation of China ( 11675005 , 11335003 , 91226202 , 51471025 and 51671020 ), 111 Project ( B07003 ), and the Program for Changjiang Scholars and the Innovative Research Team of the University . Part of the Atom probe tomography was conducted at ORNL's Center for Nanophase Materials Sciences (CNMS, Project NO. 2017-021), which is a U.S. DOE Office of Science User Facility. The authors acknowledge the use of facilities as well as scientific and technical assistance of the Materials Characterization Facility of Nanjing University of Science and Technology.

Keywords

Chemical segregation
High-entropy alloy
Irradiation effects
Structural damage

Access to Document

10.1016/j.scriptamat.2017.09.025

Cite this

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title = "Effects of temperature on the irradiation responses of Al0.1CoCrFeNi high entropy alloy",

abstract = "Structural damage and chemical segregation in Al0.1CoCrFeNi high entropy alloy irradiated at elevated temperatures are studied using transmission electron microscopy (TEM) and atom probe tomography (APT). Irradiation-induced defects include dislocation loops, long dislocations and stacking-fault tetrahedra, but no voids can be observed. As irradiation temperature increases, defect density is decreased but defect size is increased, which is induced by increasing defect mobility. APT characterization reveals that ion irradiation at elevated temperatures can induce an enrichment of Ni and Co as well as a depletion of Fe and Cr at defect clusters, mainly including dislocation loops and long dislocations.",

keywords = "Chemical segregation, High-entropy alloy, Irradiation effects, Structural damage",

author = "Tengfei Yang and Songqin Xia and Wei Guo and Rong Hu and Poplawsky, \{Jonathan D.\} and Gang Sha and Yuan Fang and Zhanfeng Yan and Chenxu Wang and Congyi Li and Yong Zhang and Zinkle, \{Steven J.\} and Yugang Wang",

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doi = "10.1016/j.scriptamat.2017.09.025",

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TY - JOUR

T1 - Effects of temperature on the irradiation responses of Al0.1CoCrFeNi high entropy alloy

AU - Yang, Tengfei

AU - Xia, Songqin

AU - Guo, Wei

AU - Hu, Rong

AU - Poplawsky, Jonathan D.

AU - Sha, Gang

AU - Fang, Yuan

AU - Yan, Zhanfeng

AU - Wang, Chenxu

AU - Li, Congyi

AU - Zhang, Yong

AU - Zinkle, Steven J.

AU - Wang, Yugang

PY - 2018/2

Y1 - 2018/2

N2 - Structural damage and chemical segregation in Al0.1CoCrFeNi high entropy alloy irradiated at elevated temperatures are studied using transmission electron microscopy (TEM) and atom probe tomography (APT). Irradiation-induced defects include dislocation loops, long dislocations and stacking-fault tetrahedra, but no voids can be observed. As irradiation temperature increases, defect density is decreased but defect size is increased, which is induced by increasing defect mobility. APT characterization reveals that ion irradiation at elevated temperatures can induce an enrichment of Ni and Co as well as a depletion of Fe and Cr at defect clusters, mainly including dislocation loops and long dislocations.

AB - Structural damage and chemical segregation in Al0.1CoCrFeNi high entropy alloy irradiated at elevated temperatures are studied using transmission electron microscopy (TEM) and atom probe tomography (APT). Irradiation-induced defects include dislocation loops, long dislocations and stacking-fault tetrahedra, but no voids can be observed. As irradiation temperature increases, defect density is decreased but defect size is increased, which is induced by increasing defect mobility. APT characterization reveals that ion irradiation at elevated temperatures can induce an enrichment of Ni and Co as well as a depletion of Fe and Cr at defect clusters, mainly including dislocation loops and long dislocations.

KW - Chemical segregation

KW - High-entropy alloy

KW - Irradiation effects

KW - Structural damage

UR - https://www.scopus.com/pages/publications/85030152045

U2 - 10.1016/j.scriptamat.2017.09.025

DO - 10.1016/j.scriptamat.2017.09.025

M3 - Article

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