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Ultrafine grained AA7075 aluminum alloy (Al–6Zn–2Mg–1Cu), was produced by cryorolling the solutionized samples followed by annealing and peak aging treatments. In the cryorolled and peak aged (CRPA) alloy, the presence of large amount of dislocations acted as nucleation sites for precipitation, resulting in finer and densely distributed precipitates, when compared to its coarse grain peak aged (CGPA)...
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