Effect of the Delay in Time Between Cooling and Aging in Heat-Treated Cast Aluminum Alloys

The mechanical properties of cast aluminum alloys can be affected by the delay in time involved between the stages of rapid cooling after solubilization (quenching) and aging. This effect was studied on samples from three different Al-Si alloys that were cast with a wide range of microstructures. It...

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Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2011-10, Vol.42 (5), p.1023-1030
Main Authors: Carrera, Efrén, Alejandro González, J., Talamantes-Silva, José, Colás, Rafael
Format: Article
Language:English
Subjects:
Alloys
Aluminum alloys
Aluminum base alloys
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cooling
Delay
Exact sciences and technology
Heat
Heat treatment
Intermetallic compounds
Materials Science
Mechanical properties
Metallic Materials
Metals. Metallurgy
Microstructure
Nanotechnology
Process metallurgy
Production of metals
Structural Materials
Surfaces and Interfaces
Thin Films
Time
Ultimate tensile strength
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Summary:The mechanical properties of cast aluminum alloys can be affected by the delay in time involved between the stages of rapid cooling after solubilization (quenching) and aging. This effect was studied on samples from three different Al-Si alloys that were cast with a wide range of microstructures. It was found that the parameter that exerts the highest influence on the mechanical properties is the degree of microstructural refining, which is referred to dendrite arm spacing, as a finer structure enhances the strength and ductility. It was found that the yield strength and total elongation, and to a lesser extend the ultimate tensile strength, are affected by the delay in time. The material that was treated to the peak-aged condition was found to be more susceptible to the reduction in mechanical properties with the increase in the delay in time.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-011-9534-1