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.
| Author details: | 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 |
| Title of parent work (English): | Materials science & engineering. A, Structural materials: properties, microstructure and processing |
| Subtitle (English): | microstructural dependence of the pre-exponential term in Al |
| Publisher: | Elsevier |
| Place of publishing: | Lausanne |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2020/03/03 |
| Publication year: | 2020 |
| Release date: | 2023/10/02 |
| Tag: | Aluminum alloys; creep; dislocations; fractal; stress exponent |
| Volume: | 776 |
| Article number: | 139036 |
| Number of pages: | 7 |
| Funding institution: | MINECO, Spain [MAT2017-83825-C4-1-R] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Peer review: | Referiert |
