Elastic–plastic-damage model of nano-indentation of the ion-irradiated 6061 aluminium alloy
Authors:
- A. Ustrzycka,
- B. Skoczeń,
- M. Nowak,
- Ł. Kurpaska,
- E. Wyszkowska,
- J. Jagielski
Abstract
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.
- Record ID
- CUT49b06650e2824d7f801d18d5eee1d233
- Publication categories
- ;
- Author
- Journal series
- International Journal of Damage Mechanics, ISSN 1056-7895, e-ISSN 1530-7921
- Issue year
- 2020
- Vol
- 29
- No
- 8
- Pages
- 1271-1305
- Other elements of collation
- il. (w tym kolor.); Bibliografia (na s.) - 1302-1305; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 29, Iss. 8
- Keywords in English
- radiation-induced damage, evolution of vacancy clusters, nano-indentation test, ion irradiation, radiation hardening
- DOI
- DOI:10.1177/1056789520906209 Opening in a new tab
- URL
- https://journals.sagepub.com/doi/10.1177/1056789520906209 Opening in a new tab
- Related project
- Kompleksowy wieloskalowy model konstytutywny napromieniowanych materiałów wielofazowych i kompozytowych w zastosowaniach do ekstremalnie niskich temperatur. . Project leader at PK: , ,
- Wieloskalowy model mechanizmów pękania materiałów niejednorodnych w warunkach obciążeń złożonych w ekstremalnie niskich temperaturach. . Project leader at PK: , ,
Projects financed by NSC [Projekty finansowane przez NCN]
- Kompleksowy wieloskalowy model konstytutywny napromieniowanych materiałów wielofazowych i kompozytowych w zastosowaniach do ekstremalnie niskich temperatur. . Project leader at PK: , ,
- Language
- eng (en) English
- Score (nominal)
- 100
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT49b06650e2824d7f801d18d5eee1d233/
- URN
urn:pkr-prod:CUT49b06650e2824d7f801d18d5eee1d233
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.