Hardness values of the differently processed alloys have been measured to understand the ageing behavior of Al-6Mg alloy with scandium addition. The hot-rolled alloys after ageing do not show any hardening response due to ageing. Ageing of cold-rolled alloys envisaged precipitation of Al3Sc which...
8.3 Non-age-hardenable aluminium alloys The use of non-age-hardenable wrought alloys in aircraft is limited because they lack the strength, fatigue resistance and ductility needed for structural components such as skin panels, stiffeners, ribs and spars. The proof strength of most tempered non-age...
Al-Si-Mg casting alloysYield strength (YS) ageing curves have been modelled for A356 and A357 aluminium casting alloys below the solvus temperature of the main hardening precipitate. Predictions are based on the Shercliff and Ashby methodology (Acta Metall. Mater. 38 (1990) 1789) for wrought ...
In this study, AA 2024 (AlCuMg2) and AA 6063 (AlMg2Si) wrought alloys were used as test materials and the test materials were provided from SEYDISEHIRALUMINUM and ACAMETAL (Turkey). The chemical composition of the material used is given in Table 1. For adhesive wear and hardness test ...
age hardeningAl-Mg-Si alloysComputer modelling, due to it saving time and money, has been widely used in industrial simulation. The present model, which is based on the Shercliff-Ashby methodology for the ageing of aluminum alloys, can be used to predict the yield strength (or hardness) of...
When aged at 373K, however, it was successfully achieved for the HPT specimen to increase the hardness up to ~290HV, the highest level of hardness among conventional wrought aluminum alloys. The corresponding TEM microstructures confirmed that refined 未' particles precipitate within ultrafine grains...
International conference on advances in metallic materials and manufacturing processes for strategic sectorsICAMPS 2012V. Anil Kumar et al., Age hardening behaviour of Al-8Zn-2Mg-2Cu wrought aluminium alloy, Materials Science Forum, Vol 710 (2012), 527-53...
Natural ageing also resulted in comparable levels of hardening to that observed in wrought alloys, although some anomalous results were obtained when the precipitate microstructures of the P/M alloys were ...
However, Mg–Zn binary alloys [2,3] often show a moderate age hardening response, due to the coarse size and the limited number density of rod-like β1' precipitates. It was reported that small additions of Ca [15], Ag [7], Cu [16] or the combined addition of Ag and Ca [7,17...
age-hardening rates at 37° C. of alloys consisting essentially of 6 at % Ga, 6 at % Al and 6 at % Zn are shown with that of a commercial Type IV gold alloy. The hardening rate is expressed as the ratio of the increment of hardness to the initial hardness. It is clear from FIGS...