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STEM Characterization of Dislocation Loops in Irradiated FCC Alloys

Journal Article · · Journal of Nuclear Materials
In this study, we demonstrate the methodology systematically developed for dislocation loop (perfect and faulted loops) imaging and analysis in irradiated face-centered-cubic (FCC) alloys using scanning transmission electron microscopy (STEM). On-zone [001] STEM imaging was identified as the preferred choice for its accuracy and effectiveness based on the comparison with other dislocation loop imaging techniques including: (i) on-zone STEM imaging using other major low-index zone axes, (ii) kinematic two-beam conditions bright field imaging near the [001] zone axis in conventional TEM (CTEM) mode, and (iii) Rel-Rod CTEM dark-field (DF) imaging near the [011] zone axis. The effect of STEM collection angle on the contrast formation of dislocation loops was also investigated. The developed method was confirmed by imaging all populations of perfect and faulted loops of types a/2$$\langle$$110$$\rangle$${110} and a/3$$\langle$$111$$\rangle$${111} found in an ion irradiated Ni40Fe40Cr20 alloy. The proposed STEM-based technique can easily identify said loops with a size greater than 10 nm without any assumptions such as those commonly made using the conventional Rel-Rod CTEM-DF technique. The recommended methodology in this study is developed as a quick and convenient tool that can be generally applied to irradiated FCC-based materials due to their common crystallography.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1872876
Alternate ID(s):
OSTI ID: 1776051
Journal Information:
Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: N/A Vol. 544; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (69)

The observation of multiple-layer loops in nickel base alloys under ion bombardment journal April 1976
The Stopping and Range of Ions in Matter book January 1985
Fundamentals of Radiation Materials Science book January 2017
Transmission Electron Microscopy: Diffraction, Imaging, and Spectrometry book January 2016
Effects of electron irradiation on precipitation in Ni-Al alloys journal December 1978
Observation of large faulted interstitial loops in proton-irradiated nickel journal October 1970
Electron irradiation damage in high purity aluminum journal January 1977
Spatial variation in void volume during charged particle bombardment — the effects of injected interstitials journal December 1979
Impact of the injected interstitial on the correlation of charged particle and neutron-induced radiation damage journal July 1983
Irradiation creep mechanisms: An experimental perspective journal October 1988
Overview of microstructural evolution in neutron-irradiated austenitic stainless steels journal October 1993
Dose dependence of the microstructural evolution in neutron-irradiated austenitic stainless steel journal November 1993
Role of solute atoms on microstructural evolution in neutron irradiated nickel journal September 1994
The formation and interpretation of defect images from crystalline materials in a scanning transmission electron microscope journal January 1976
A transport equation theory of beam spreading in the electron microscope journal January 1983
Deformation mechanisms in 316 stainless steel irradiated at 60°C and 330°C journal December 2000
Microstructural evolution of Alloy 718 at high helium and hydrogen generation rates during irradiation with 600–800 MeV protons journal December 2000
Evolution of fine-scale defects in stainless steels neutron-irradiated at 275 °C journal April 2003
Influence of irradiation temperature and dose gradients on the microstructural evolution in neutron-irradiated 316SS journal April 2003
Microstructural analysis of ion-irradiation-induced hardening in inconel 718 journal May 2003
Relationship between hardening and damage structure in austenitic stainless steel 316LN irradiated at low temperature in the HFIR journal June 1999
Stability and mobility of defect clusters and dislocation loops in metals journal January 2000
Chapter 88 Dislocation–Obstacle Interactions at the Atomic Level book January 2009
Molecular dynamics simulation of screw dislocations interacting with interstitial frank loops in a model FCC crystal journal February 2004
Mapping single-crystal dendritic microstructure and defects in nickel-base superalloys with synchrotron radiation journal October 2008
On chemical order and interfacial segregation in γ′ (AlAg2) precipitates journal May 2014
Defect sink characteristics of specific grain boundary types in 304 stainless steels under high dose neutron environments journal May 2015
Effect of alloying elements on defect evolution in Ni-20X binary alloys journal June 2018
Effects of 3d electron configurations on helium bubble formation and void swelling in concentrated solid-solution alloys journal December 2019
Structural damage and phase stability of Al0.3CoCrFeNi high entropy alloy under high temperature ion irradiation journal April 2020
Predicting damage production in monoatomic and multi-elemental targets using stopping and range of ions in matter code: Challenges and recommendations journal August 2019
TEM characterization of dislocation loops in irradiated bcc Fe-based steels journal March 2013
Thermomechanical treatment for improved neutron irradiation resistance of austenitic alloy (Fe–21Cr–32Ni) journal June 2013
Microstructure and swelling of neutron irradiated nickel and binary nickel alloys journal November 2013
Microstructural evolution of CANDU spacer material Inconel X-750 under in situ ion irradiation journal November 2013
Deformation localization and dislocation channel dynamics in neutron-irradiated austenitic stainless steels journal May 2015
Formulating the strength factor α for improved predictability of radiation hardening journal October 2015
Modeling injected interstitial effects on void swelling in self-ion irradiation experiments journal April 2016
Observations of defect structure evolution in proton and Ni ion irradiated Ni-Cr binary alloys journal October 2016
Radiation damage buildup and dislocation evolution in Ni and equiatomic multicomponent Ni-based alloys journal July 2017
Evolution of ion damage at 773K in Ni- containing concentrated solid-solution alloys journal April 2018
Interstitial migration behavior and defect evolution in ion irradiated pure nickel and Ni-xFe binary alloys journal October 2018
Microstructural response of He+ irradiated FeCoNiCrTi0.2 high-entropy alloy journal November 2018
Radiation tolerance of commercial and advanced alloys for core internals: a comprehensive microstructural characterization journal November 2018
Dislocation loop evolution and radiation hardening in nickel-based concentrated solid solution alloys journal September 2020
Quantification of internal dislocation density using scanning transmission electron microscopy in ultrafine grained pure aluminium fabricated by severe plastic deformation journal December 2010
SRIM – The stopping and range of ions in matter (2010)
  • Ziegler, James F.; Ziegler, M. D.; Biersack, J. P.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 11-12 https://doi.org/10.1016/j.nimb.2010.02.091
journal June 2010
New ion beam materials laboratory for materials modification and irradiation effects research journal November 2014
Effects of compositional complexity on the ion-irradiation induced swelling and hardening in Ni-containing equiatomic alloys journal July 2016
Enhanced damage resistance and novel defect structure of CrFeCoNi under in situ electron irradiation journal December 2016
Diffraction contrast STEM of dislocations: Imaging and simulations journal August 2011
Towards bend-contour-free dislocation imaging via diffraction contrast STEM journal October 2018
Toward high-throughput defect density quantification: A comparison of techniques for irradiated samples journal November 2019
Automated Detection of Helium Bubbles in Irradiated X-750 journal October 2020
Removal of FIB Damage using Flash Electropolishing for Artifact-free TEM Foils journal August 2019
Multiscale modelling of plastic flow localization in irradiated materials journal August 2000
Enhancing radiation tolerance by controlling defect mobility and migration pathways in multicomponent single-phase alloys journal December 2016
Electron radiation damage in copper in the high voltage electron microscope journal February 1971
Atomic-scale plasticity in the presence of Frank loops journal January 2007
Systematic row and zone axis STEM defect image simulations journal June 2011
The effect of quenching history, quenching temperature and trace impurities on vacancy clusters in aluminium and gold journal July 1963
Faulted defects in quenched copper and silver journal June 1966
Climb kinetics of dislocation loops in aluminium journal July 1967
Climb kinetics of dislocation loops in aluminium journal December 1968
Dislocation loop growth in an electron irradiated thin foil journal December 1970
Enhanced void swelling in NiCoFeCrPd high-entropy alloy by indentation-induced dislocations journal August 2018
Drastic influence of micro-alloying on Frank loop nature in Ni and Ni-based model alloys journal March 2020
Formation of stacking-fault tetrahedra in aluminum irradiated with high-energy particles at low-temperatures journal March 2004
Application of STEM characterization for investigating radiation effects in BCC Fe-based alloys journal April 2015