期刊
COMPUTATIONAL MATERIALS SCIENCE
卷 41, 期 1, 页码 86-95出版社
ELSEVIER
DOI: 10.1016/j.commatsci.2007.03.013
关键词
aluminium alloys; material optimisation; mechanical properties; solid solution; work hardening; particle strengthening; multiple regression
A range of mechanical properties have been investigated for non-hardenable aluminium alloys. Commercially pure aluminium, Al-Mn, and Al-Mg alloys in five tempers have been covered. In the models solid solution, particle strengthening and work hardening have been taken into account. Ab-initio calculations of the size and modulus misfit parameters that are needed in the solid solution hardening model have been performed. In accordance with the Labusch-Nabarro model, the solid solution hardening has been shown to be proportional to epsilon(4/3)(L)c(2/3), where epsilon(L) is the Fleischer misfit parameter and c the solute concentration. A cold work parameter H has been introduced. The contribution from cold working is linear in H for the tensile strength and fatigue endurance, whereas the contributions to the yield strength and to the hardness are proportional to H-0.5. (C) 2007 Elsevier B.V. All rights reserved.
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