Influence of quench and heating rates on the ageing response of an Al–Zn–Mg–(Zr) alloy
作者： A. Deschamps , Y. Bréchet
DOI: 10.1016/S0921-5093(98)00615-7
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摘要: Abstract The influence of the quench rate on microstructure and ageing response a Zr-containing Al–Zn–Mg alloy was investigated. It is shown that Al3Zr dispersoids are efficient nuclei for precipitation coarse, equilibrium η precipitates during quench. Dispersoids heterogeneously distributed in bands, resulting bands quenched-induced after slow characterized by various levels heterogeneities `composite' material. On microscopic scale, quench-induced surrounded precipitate-free zone. mesoscopic material separated unperturbed regions high density coarse low hardening precipitates. Finally, makes more sensitive to heating temperature, due slower GP zone natural because annihilation vacancies quenching.
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