Solid state bonding of superplastic 5083 (SP5083) and 5083–H323 aluminium alloys has been studied. Press bonding was employed to bond the aluminium alloys in air. Temperature, time, deformation, and grain size were used as process variables whose effects were assessed in terms of bond strengths. The measured shear strengths were strongly influenced by the bonding parameters and alloy microstructures. The strengths of highly deformed specimens were very sensitive to the bonding temperature, and the combined effects of bonding temperature and holding time was very dependent on the microstructural conditions. Using alloy sheets with a finer grain structure resulted in higher bond strengths.
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