Al-Cu-Sn合金の低温時効遅滞に関する初期時効の活性化エネルギの考察
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A vacancy-trapping model has been proposed for explanation of the aging retardation in Al-Cu-Sn alloys at low temperatures in which Sn atoms would trap excess quenched-in vacancies causing reduction in diffusivity of Cu atoms. Although activation energies of initial aging experimentally obtained in binary and ternary alloys are of importance, little information concerns theoretical discussions on those energies. This paper theoretically discusses the activation energies assuming that the model is available. The activation energy is not peculiar to binary or ternary alloy and depends on the composition of the alloy and aging temperatures. If the energy of the alloy having a fixed composition is experimentally determined, only an apparent energy can be found as a function of two aging temperatures freely selected. The energy conventionally obtained by the least squares method using an experimental relation between ln R and 1/TA (R: initial rate of aging, TA; aging temperature) would not represent even the apparent one as mentioned above.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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