Experimental Investigation of Gas-Oscillation Superplastic Forming of AA5083 Aluminum Sheet in a Dual-Cavity Tool

Abstract:

Experimental studies show the significant improvement of superplastic formability of AA5083 alloy under oscillating loads. Tensile tests are performed to determine the benefits of oscillatory stress at 450°C. Microstructural analysis of the tested specimen indicates an improvement in the grain boundary sliding mechanism with oscillation. Based on the knowledge from the tensile tests, a Gas-Oscillation Superplastic Forming (GO-SPF) process is developed. The cycle time of the GO-SPF process to form a AA5083 part in a dual-cavity tool without failure is impressively 4.5 times shorter than the required one of a conventional superplastic forming (SPF) process, while the GO-SPF process is found to provide practically identical forming quality to the conventional SPF process. Significant potential benefits of the GO-SPF process are presented.

• Periodical: Key Engineering Materials (Volume 1034)
• Pages: 27-35
• DOI: https://doi.org/10.4028/p-ROD8wM
• Online since: December 2025
• Authors: Eugene Ryzer*, Yang Song, Si Chang Xu, Leo Kiawi, Daniel E. Green, Gary Rankin
• Keywords: Fluidic Oscillator, Gas Oscillation, Superplastic Forming, Superplastic Tensile Test

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