Study of Microscopic Residual Stresses in an Extruded Aluminium Alloy Sample after Thermal Treatment
| Autor: | Ricardo Fernández, A. Sáez, G. Kronberger, I. V. Papushkin, Juan Lanchares, P. Halodova, José Ignacio Hidalgo, Oscar Garnica, L. Millán, Gizo Bokuchava, Gaspar González-Doncel |
|---|---|
| Přispěvatelé: | Comunidad de Madrid, Ministerio de Economía y Competitividad (España) |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Neutron diffraction Alloy engineering.material Microstructure Genetic programming Microscopic scale Surfaces Coatings and Films Stress (mechanics) Electron backscatter diffraction Grain orientation Residual stress visual_art Lattice spacing Microscopic residual stresses Aluminium alloy visual_art.visual_art_medium engineering Composite material |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1819-7094 |
| Popis: | A method is proposed to calculate the microscopic residual stresses in extruded cylindrical samples of non-ageing aluminium alloy 5083 (Al–Mg), arising from quenching in fresh water from 530°C. We start from the premise that the alloy is single-phase and non-isotropic on a microscopic scale; it consists of many grains that exhibit different mechanical response depending on their crystallographic orientation and neighboring grains. Microscopic residual stresses depend on the applied heat treatment, microstructure and mechanical strength of the individual grains. The stresses were calculated from neutron diffraction data. Genetic programming algorithms were used to calculate microscopic residual stresses, considering that each diffraction peak describes the stress distribution of a group of grains having a certain orientation, size and environment. The algorithm assigns a stress value to each grain according to the distribution of the diffraction peaks and the microstructural parameters of these grains. This work was supported by the Madrid Regional Government-FEDER grant Y2018/NMT-4668 (Micro-Stress-MAP-CM) and the project MAT2017-83825-C4-1-R. We would also like to express our gratitude to FLNR-JINP for the beam time allocated on the FSD instrument, and to the HeuristicLab Software developers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink