Abstract
Cryogenic rolling (CR) and room-temperature rolling (RTR) process of AA5154 were studied for their effects on the strengthening mechanisms underlying the alloy's mechanical properties. The results indicate that following Cryogenic processing, the AA 5154 dislocation density increases while the particle size of the sub-grains as well as second-phase particles greatly decreases. The AA 5154 benefits greatly from CR processing, as compared to RTR processing, in terms of yield strength, ultimate tensile strength, and elongation. This can be explained by the combined impacts of a higher quality grain structure and a strengthening of the material due to dislocations.
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