MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Effect of Cold-Rolling on Damping Characteristics of Multi-Component Al–12%Si Alloy Measured by Dynamic Mechanical Analyzer
Shyi-Kaan WuShih-Hang ChangChen Chien
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2013 Volume 54 Issue 5 Pages 738-744

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Abstract

Compared to pure Al, a multi-component Al–12%Si alloy deteriorates the low-frequency damping capacity in the temperature regions of an athermal damping background and a high-temperature damping background (HTDB) because the dislocation motions during damping are impeded by the abundant silicon particles in Al–12%Si alloy. However, Al–12%Si alloy improves the creep resistance in the HTDB temperature region because of an increase in the activation energy of the HTDB. Severely cold-rolled Al–12%Si alloy significantly increases the damping capacity and hardness, and a conspicuous internal friction peak appears at approximately 270°C which corresponds to the occurrence of grain recrystallization. The effect of cold-rolling becomes insignificant after recrystallization occurs.

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© 2013 The Japan Institute of Metals and Materials
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