Evolution of irradiation-induced strain in an equiatomic NiFe alloy

被引：28
|
作者：
Ullah, Mohammad W. [1 ]
Zhang, Yanwen [1 ]
Sellami, Neila [1 ]
Debelle, Aurelien [2 ]
Bei, Hongbin [1 ]
Weber, William J. [1 ,3 ]
机构：
[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA
[2] Univ Paris Saclay, Univ Paris Sud, CNRS, CSNSM,IN2P3, F-91405 Orsay, France
[3] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
来源：
SCRIPTA MATERIALIA | 2017年 / 140卷
关键词：
Molecular dynamics; X-ray diffraction (XRD); Nickel alloys; Point defects; Strain relaxation; MOLECULAR-DYNAMICS; DEFECT PRODUCTION; SEMICONDUCTORS; ENERGY; NICKEL;
D O I：
10.1016/j.scriptamat.2017.06.042
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The evolution of irradiation-induced atomic strain in an equiatomic NiFe concentrated solid-solution alloy is investigated using both atomistic simulations and x-ray diffraction analysis. The irradiations are performed using 1.5 MeV Ni ions to fluences ranging from 1 x 10(13) to 1 x 10(14) cm(-2). The irradiation simulations are carried out by overlapping 5 keV Ni recoils cascades up to a total of 300 recoils. An increase of volumetric strain is observed at low dose, which is associated with production of point defects and small clusters. Relaxation of strain occurs at higher doses, when large defect clusters, e.g., dislocation loops, dominate. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：35 / 39
页数：5
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