Microstructure, Properties and Annealing Behavior of an ARB-Processed Al20%Sn Alloy

Abstract:

Severe plastic deformation processes are used to refine grain structure by means of very high deformations. Equivalent Von-Mises strains in the range of 5.06 to 11.57 were obtained using the accumulative roll-bonding (ARB) process. The effect of the initial microstructure is analyzed. Microstructure, microhardness and tensile strength of the alloy, both starting with previously cold-rolled material and after a 30 minute, 300 °C heat treatment, are compared. The effect of a heat treatment after 5 steps of ARB ( = 8.11) is also presented. Results show that even though both the microhardness and tensile strength go up with increasing deformation, they are not related to each other by a factor of 3. The highest values of these parameters depend more on the initial microstructure than on the total deformation. A better distribution of the second phase and an increase in solid solubility are also observed after ARB.

• Periodical: Advanced Materials Research (Volumes 89-91)
• Pages: 59-64
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.89-91.59
• Online since: January 2010
• Authors: Agustín Bravo, Rafael Schouwenaars, Armando Ortiz, Víctor H. Jacobo
• Keywords: Accumulative Roll Bonding (ARB), Aluminum (Al), Nanostructured, Severe Plastic Deformation (SPD), Triboalloys

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