Investigation of Cryogenic Thermal Conductivity of AA7115 Subjected to Various Heat Treatments

Abstract:

Thermal conductivity measurements of high-strength AA 7115 cryogenic thermal conductivity under various circumstances of solution and ageing were made using a one-dimensional steady state method. Structural analysis is also used to examine the heat conductivity of the alloy. Aluminum alloy's thermal conductivity decreased linearly as the temperature lowered. The thermal conductivity at various temperatures was reduced by a considerable 35 percent after the solution was applied. The thermal conductivity of the fluid was dramatically lowered after deep cryogenic treatment. In contrast, the ageing process improved the thermal conductivity succeeding solution-deep cryogenic therapy or solution. There were many point flaws in the lattice that increased electrical scattering, which resulted in a decrease in heat conductivity. After severe cryogenic treatment, thermal conductivity dropped even further because of the larger in size of Aluminum - Copper precipitates and raised dislocation density. Raise in thermal conductivity cause by increase in number of fine secondary phase particles precipitating with time. Thermal conductivity of aluminium alloy can be employed to study deep cryogenic treatment methods at low temperatures.

• Periodical: Key Engineering Materials (Volume 935)
• Pages: 115-124
• DOI: https://doi.org/10.4028/p-hvkr4w
• Online since: November 2022
• Authors: K. Arunprasath*, M. Muthumalai, S. Kavitha, T.R. Vijayaram
• Keywords: AA 7115, Cryogenic, Electro Scattering, Heat Treatments, Thermal Conduction

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