Matthiessen empirical relation in Al-Mg solid solutions containing less than 3.8%.
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The relations between the ratio of resistance measured at two different temperatures and the resistivity are induced for general solid solutions showing deviation from Matthiessen's Rule (DMR) through dependences of resistivity on concentration and on temperature. The contribution to resistivity per unit concentration (Δρ) of Mg has been experimentally determined at 77 and 300K. The Δρ is larger at higher temperature and the DMR is slightly positive. After a correction about DMR, the empirical relation between the resistance ratio (R=ρ(300)/ρ(77)) and the resistivity at 77K (ρ(77)) has been obtained as2.3<ρ(77)/nΩm=[25.15/(R-1.054)]-0.028<23in the solution treated state. Comparing the Matthiessen empirical relation of cold rolled specimens to that of annealed specimens, the DMR of dislocation in aluminum is estimated to be negative.
- 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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