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Tensile tests have been conducted at 77 and 293 K in order to examine the effect of natural ageing on the subsequent artificial ageing behaviour of the industrial alloy AA6111. The evolution of the yield stress as a function of ageing time at 180[deg ]C was measured for samples with no natural ageing time and a prolonged period of natural ageing (i.e. T4 material). The nature of the obstacles was...
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