Cyclic plastic behaviour of 7075 aluminium alloy

Nogueira, F.; Cunha, J.; Mateus, A.; Malça, C.; Costa, J. D.; Branco, R.

http://hdl.handle.net/10400.8/14246

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Cyclic plastic behaviour of 7075 aluminium alloy.pdf	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	Download

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Abstract(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.

Description

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

Keywords

Low-cycle fatigue cyclic plastic behaviour strain-softening aluminium alloy 7075-T651

URI

http://hdl.handle.net/10400.8/14246

Citation

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.