The hardness variation and the behaviour of precipitation during the process of three stage ageing of three Al-Cu-Mg alloys were investigated using micro-hardness and differential scanning calorimetry (DSC). To facilitate the determination of the optimised heat treatment condition, a uniform design method was employed by which the influences of three stages interrupted ageing on the hardness an...

Research & Development in Material Science Effect of Cold Air Jet Cooling on Weld Quality Friction Stir Welding AA2024-T351 Marvene Xavier Fernandes1, Jamal Sheikh-Ahmad1, Fahrettin Ozturk2,3*, and Firas Jarrar1 1Department Mechanical Engineering, Khalifa University Technology, United Arab Emirates 2Turkish Aerospace Industries, Inc., Ankara, Turkey 3Department Engineering Ankara Yildirim Beyaz...

Fatigue crack growth is decisive for the design of thin-walled structures such as fuselage shells air planes. The cold rolling process, used to produce aluminium sheets this structure made of, leads anisotropic mechanical properties. In contribution, we simulate fatigue with a phase-field model due its superior ability arbitrary paths. A variable based on Local Strain Approach describes progres...

In this work, fatigue crack growth (FCG) in the 2024-T351 aluminium alloy is studied using plastic CTOD range, Δδp. Experimental tests were performed on 12 mm thick CT specimens order to obtain FCG rate and cylindrical stress–strain loops. A numerical analysis replicated experimental work terms of material, geometry loading conditions, but assuming pure plane strain state, The material paramete...