Substantiation of the Copper Concentration in Thermally Stable Wrought Aluminum Alloys Containing 2 wt % of Mn

The effect of the annealing temperature on the specific electrical resistance, hardness, and structure of Al–Cu–Mn alloys containing 2 wt % Mn and up to 3 wt % Cu in the as-cast and cold-rolled states has been studied using experimental and computational methods. It has been demonstrated that the be...

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Bibliographic Details
Published in:Physics of metals and metallography 2020-12, Vol.121 (12), p.1211-1219
Main Authors: Belov, N. A., Korotkova, N. O., Shurkin, P. K., Aksenov, A. A.
Format: Article
Language:English
Subjects:
Aluminum
Aluminum alloys
Aluminum base alloys
Analysis
Annealing
Chemistry and Materials Science
Cold rolling
Copper
Dispersions
Hardness
Manganese
Materials Science
Mechanical properties
Metallic Materials
Specialty metals industry
Strength and Plasticity
Thermal stability
Zirconium
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Summary:The effect of the annealing temperature on the specific electrical resistance, hardness, and structure of Al–Cu–Mn alloys containing 2 wt % Mn and up to 3 wt % Cu in the as-cast and cold-rolled states has been studied using experimental and computational methods. It has been demonstrated that the best complex of mechanical properties is attained in the cold-rolled sheets containing 2–3 wt % Cu after annealing at 400°C due to the formation of more than 9 vol % of Al 20 Cu 2 Mn 3 phase dispersoids with an average size of less than 100 nm in their structure. Such a structure provides higher thermal stability in comparison with 1201 grade alloy (of similar alloying system 0.32 Mn, 5.86 Cu, 0.07 Fe, 0.08 Si, 0.08 Zr wt %) hardened by quenching and aging.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X20120030