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Effects of the aging temperature on the hardening response,the tensile properties and the precipitate microstructure evolution of 1460 alloy were studied in this work.It was found that Al3(Sc,Zr) and d0(Al3Li) phases were precipitated from the matrix at the very early aging stage,while the precipitation of T1(Al2Cu Li) and h0(Al2Cu) was much slower than that of the d0 phase.When aging at higher temperature(160 and 190 °C),the d0,T1 and h0 phases tended to form simultaneously and grow up very quickly.Conversely,the d0 and h00(Al2Cu) phases were precipitated separately and more dispersive at lower aging temperature(130 °C).Taken together,the alloy aged at 160 °C exhibited improved mechanical properties owing to the uniform dispersion of the fine T1 precipitates.
Effects of the aging temperature on the hardening response, the tensile properties and the precipitate microstructure evolution of 1460 alloy were studied in this work. It was found that Al3 (Sc, Zr) and d0 (Al3Li) phases were precipitated from the matrix at the very early aging stage, while the precipitation of T1 (Al2Cu Li) and h0 (Al2Cu) was much slower than that of the d0 phase. Temperature aging at higher temperature (160 and 190 ° C), the d0, T1 and h0 phases tended to form simultaneously and grow very quickly. Conversely, the d0 and h00 (Al2Cu) phases were precipitated separately and more dispersive at lower aging temperature (130 ° C) .Taken together, the alloy aged at 160 ° C. to the uniform dispersion of the fine T1 precipitates.