Kinetics of evolution of radiation induced micro-damage in ductile materials subjected to time-dependent stresses

Skoczen, B.; Ustrzycka, Aneta

doi:10.1016/j.ijplas.2016.01.006

Cited by 16 publications

(8 citation statements)

References 38 publications

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“…The Rice–Tracey model operates directly on the size of void, and the radius of void increment can be easily converted to damage parameter (cf. Skoczeń and Ustrzycka, 2016). Afterwards, Gurson (1977) proposed a constitutive model of porous materials including the micro-voids.…”

Section: Discussionmentioning

confidence: 99%

“…The kinetics of radiation-induced damage involves essentially two models describing the evolution of porosity in the materials: the Gurson model and – for comparison – the Rice and Tracey model (cf. Skoczeń and Ustrzycka, IJP, 2016). Both of them address the evolution of porosity in the form of spherical or ellipsoidal voids in a different way.…”

Section: Elastic–plastic Deformation During Nano-indentationmentioning

confidence: 99%

“…The material parameters CqI, CqII, nqI, nqII, Cr, nr, D S are determined using experimental results obtained by Verbiest and Pattyn (1982). The density of defects (vacancy clusters), and the cluster size reflected by the number of atoms per cluster, expressed as a function of dpa for aluminium, are presented in Figure 11 (Skoczeń and Ustrzycka, 2016).

Figure 11.The defect clusters density and the clusters size as a function of dpa (for Al, based on Verbiest and Pattyn, 1982).…”

Section: Elastic–plastic Deformation During Nano-indentationmentioning

confidence: 99%

“…In order to predict the lifetime of irradiated components subjected to mechanical loads, the methods developed in the framework of CDM are used (Skoczeń and Ustrzycka, 2016). The main approach of the classical CDM consists in modelling at the macroscopic level the effect of initiation, coalescence and growth of damage (Besson, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Elastic–plastic-damage model of nano-indentation of the ion-irradiated 6061 aluminium alloy

Ustrzycka

Skoczen

Nowak

et al. 2020

International Journal of Damage Mechanics

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The paper presents experimental and numerical characterization of damage evolution for ion-irradiated materials subjected to plastic deformation during nano-indentation. Ion irradiation technique belongs to the methods where creation of radiation-induced defects is controlled with a high accuracy (including both, concentration and depth distribution control), and allows to obtain materials having a wide range of damage level, usually expressed in terms of displacements per atom (dpa) scale. Ion affected layers are usually thin, typically less than 1 micrometer thick. Such a low thickness requires to use nano-indentation technique to measure the mechanical properties of the irradiated layers. The He or Ar ion penetration depth reaches approximately 150 nm, which is sufficient to perform several loading-partial-unloading cycles at increasing forces. Damage evolution is reflected by the force-displacement diagram, that is backed by the stress–strain relation including damage. In this work the following approach is applied: dpa is obtained from physics (irradiation mechanisms), afterwards, the radiation-induced damage is defined in the framework of continuum damage mechanics to solve the problem of further evolution of damage fields under mechanical loads. The nature of radiation-induced damage is close to porosity because of formation of clusters of vacancies. The new mathematical relation between radiation damage (dpa) and porosity parameter is proposed. Deformation process experienced by the ion irradiated materials during the nano-indentation test is then numerically simulated by using extended Gurson–Tvergaard–Needleman (GTN) model, that accounts for the damage effects. The corresponding numerical results are validated by means of the experimental measurements. It turns out, that the GTN model quite successfully reflects closure of voids, and increase of material density during the nano-indentation.

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Section: Discussionmentioning

confidence: 99%

Section: Elastic–plastic Deformation During Nano-indentationmentioning

confidence: 99%

Figure 11.The defect clusters density and the clusters size as a function of dpa (for Al, based on Verbiest and Pattyn, 1982).…”

Section: Elastic–plastic Deformation During Nano-indentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Elastic–plastic-damage model of nano-indentation of the ion-irradiated 6061 aluminium alloy

Ustrzycka

Skoczen

Nowak

et al. 2020

International Journal of Damage Mechanics

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“…Unlike the models with only consideration of dislocation interaction (e.g. the Kocks-Mecking model) [51,52], the irradiation hardening model has been developed and used to describe the interaction between defect and dislocation [43,53]. Here, microscopic irradiation-induced defects and dislocations were introduced into a constitutive model that couples the irradiation hardening and two-phase interface in a nano-spherical particle [22,[54][55][56][57][58].…”

Section: Introductionmentioning

confidence: 99%

A constitutive model coupling irradiation with two-phase lithiation for lithium-ion battery electrodes

Xie

Wang

et al. 2019

Philosophical Magazine

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When lithium-ion batteries serve in extreme environments like space, severe irradiation might induce significant decay of the electrochemical performances and mechanical properties. In this paper, an electrochemical-irradiated constitutive model is proposed to explore the evolution of dislocation, defect and stress in electrodes during a twophase lithiation process. The results from the analytic formulation and finite difference calculations show that, as Li intercalation proceeding, the hoop stress in the surface of a spherical particle converts from compression into tension because the large lithiation strain and plastic yielding at the front pushes out the material behind it. And the plastic flow resistance continuously increases with increasing irradiation dose result from the impediment of a defect to dislocation glide. There is a clear peak in the distribution of stress at yielding locations due to the competition between dislocations multiplication and defects annihilation. The model is meaningful for thoroughly understanding the micro-mechanism of lithiation deformation and provides a guideline for predicting their mechanical behaviours of lithium-ion batteries in unconventional environment.

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Localization and macroscopic instability in nanoporous metals

et al. 2022

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Kinetics of evolution of radiation induced micro-damage in ductile materials subjected to time-dependent stresses

Cited by 16 publications

References 38 publications

Elastic–plastic-damage model of nano-indentation of the ion-irradiated 6061 aluminium alloy

Elastic–plastic-damage model of nano-indentation of the ion-irradiated 6061 aluminium alloy

A constitutive model coupling irradiation with two-phase lithiation for lithium-ion battery electrodes

Localization and macroscopic instability in nanoporous metals

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