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Cyclic plastic behaviour of 7075 aluminium alloy
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| This paper aims at studying the cyclic plastic behaviour of the 7075-T651 aluminium alloy under fully-reversed strain-controlled conditions. Tests are conducted under strain-control mode, at room temperature, in a conventional servo-hydraulic machine, from smooth samples, using the single step method, with strain amplitudes (∆ε/2) in the range ±0.5 to ±2.75%. This material has exhibited a mixed behaviour, i.e. cyclic strain-hardens at higher strain amplitudes (∆ε/2/>1.1%) and cyclic strain-softens at lower strain amplitudes (∆ε/2<1.1%). A linear relationship between the degree of cyclic strain-hardening and the strain amplitude has been established for higher strain amplitudes. Fatigue-ductility and fatigue-strength properties agree with those found in the open literature for the same loading conditions. | 939.27 KB | Adobe PDF |
Orientador(es)
Resumo(s)
This paper aims at studying the cyclic plastic behaviour of the 7075-T651 aluminium alloy under fully-reversed strain-controlled conditions. Tests are conducted under strain-control mode, at room temperature, in a conventional servo-hydraulic machine, from smooth samples, using the single step method, with strain amplitudes (∆ε/2) in the range ±0.5 to ±2.75%. This material has exhibited a mixed behaviour, i.e. cyclic strain-hardens at higher strain amplitudes (∆ε/2/>1.1%) and cyclic strain-softens at lower strain amplitudes (∆ε/2<1.1%). A linear relationship between the degree of cyclic strain-hardening and the strain amplitude has been established for higher strain amplitudes. Fatigue-ductility and fatigue-strength properties agree with those found in the open literature for the same loading conditions.
Descrição
Conference name - 1st Virtual Conference on Structural Integrity, VCSI 2020; Conference city - Virtual, Online; Conference date - 16 January 2020; Conference code - 161742
Cunha, Jorge - Scopus ID: 57210722517
Cunha, Jorge - Scopus ID: 57210722517
Palavras-chave
Low-cycle fatigue cyclic plastic behaviour strain-softening aluminium alloy 7075-T651
Contexto Educativo
Citação
F. Nogueira, J. Cunha, A. Mateus, C. Malça, J.D. Costa, R. Branco, Cyclic plastic behaviour of 7075 aluminium alloy, Procedia Structural Integrity, Volume 25, 2020, Pages 438-444, ISSN 2452-3216, https://doi.org/10.1016/j.prostr.2020.04.049.
Editora
Elsevier