Towards a comprehensive understanding of creep
- We show that the equation proposed by Takeuchi and Argon to explain the creep behavior of Al-Mg solid solution can be used to describe also the creep behavior of pure aluminum. In this frame, it is possible to avoid the use of the classic pre-exponential fitting parameter in the power law equation to predict the minimum creep strain rate. The effect of the fractal arrangement of dislocations, developed at the mesoscale, must be considered to fully explain the experimental data. These ideas allow improving the recently introduced SSTC model, fully describing the primary and secondary creep regimes of aluminum alloys without the need for fitting. Creep data from commercially pure A199.8% and Al-Mg alloys tested at different temperatures and stresses are used to validate the proposed ideas.
| Verfasserangaben: | Ricardo FernandezORCiD, Gaspar Gonzalez-DoncelORCiD, Gerardo GarcesORCiD, Giovanni BrunoORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1016/j.msea.2020.139036 |
| ISSN: | 0921-5093 |
| ISSN: | 1873-4936 |
| Titel des übergeordneten Werks (Englisch): | Materials science & engineering. A, Structural materials: properties, microstructure and processing |
| Untertitel (Englisch): | microstructural dependence of the pre-exponential term in Al |
| Verlag: | Elsevier |
| Verlagsort: | Lausanne |
| Publikationstyp: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Datum der Erstveröffentlichung: | 03.03.2020 |
| Erscheinungsjahr: | 2020 |
| Datum der Freischaltung: | 02.10.2023 |
| Freies Schlagwort / Tag: | Aluminum alloys; creep; dislocations; fractal; stress exponent |
| Band: | 776 |
| Aufsatznummer: | 139036 |
| Seitenanzahl: | 7 |
| Fördernde Institution: | MINECO, Spain [MAT2017-83825-C4-1-R] |
| Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Peer Review: | Referiert |
