The Effect of High-Pressure Torsion on the Structure and Mechanical Properties of the Al–Ca–Cu Alloy

To improve the strength-to-plasticity balance for Al–6% Ca–8% Cu (wt %), high-pressure torsion (HPT) and subsequent annealing are used. The structure of the cast alloy mainly consists of two [(Al) + AlCaCu] and [(Al) + (Al,Cu) 4 Ca + AlCaCu] eutectics. HPT with three revolutions leads to the formati...

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Bibliographic Details
Published in:Physics of metals and metallography 2023-06, Vol.124 (6), p.632-638
Main Authors: Rogachev, S. O., Naumova, E. A., Tabachkova, N. Yu, Ten, D. V., Sundeev, R. V., Zadorozhnyi, M. Yu
Format: Article
Language:English
Subjects:
Alloys
Annealing
Casting alloys
Chemistry and Materials Science
Copper
High pressure
Materials Science
Mechanical properties
Metallic Materials
Plastic properties
Pressure effects
Solid solutions
Specialty metals industry
Strength and Plasticity
Supersaturation
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Summary:To improve the strength-to-plasticity balance for Al–6% Ca–8% Cu (wt %), high-pressure torsion (HPT) and subsequent annealing are used. The structure of the cast alloy mainly consists of two [(Al) + AlCaCu] and [(Al) + (Al,Cu) 4 Ca + AlCaCu] eutectics. HPT with three revolutions leads to the formation mainly of the submicrocrystalline structure, refining eutectic particles, their more homogeneous distribution in the sample bulk, segregation of calcium from AlCuCa and (Al,Cu) 4 Ca particles, and supersaturation of (Al) solid solution with copper. Such a structure causes strengthening of the alloy by three and a half times but also leads to its embrittlement. Subsequent annealing at 400°С allows an adequate strength-to-plasticity balance to be reached.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X23600835