Abstract:The aging of Al-Zn alloys has been vastly studied for decades. In the previous paper, 0hta
et al. studied carefully the hardness of the alloy during aging and revealed the existence of softer
regions near the surface and the grain boundary than the interior of the specimen even after aging
for a long time. Electrical resistivity measurement and X-ray small angle scattering experiment
together with hardness test suggested that in these regions vacancy decay to the surface and grain
boundaries was severe, thus t… Show more
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