Multiaxial deformation behavior of aluminum alloy 6061 subjected to fire damage

Aluminum alloy AA6061 is of interest to the US Navy for ship structure applications due its light weight, ease manufacturing, corrosion resistance and strength. However, response complex loading subsequent fire damage presents a concern practical applications. The purpose this study evaluate effect on microstructure material with applied tensile, torsional, combined loading. Fire exposure was simulated in controlled environment testing under multi-axial conditions carried out virgin damaged samples mechanical response. Because non-circular sample cross-section, three-dimensional digital image correlation technique used capture evolution local strains over gage length deforming specimen subjected tensile and/or torsional Additionally, investigated by electron backscatter diffraction at target cross-section locations testing. Results indicate 60–70% strength reduction exposure. exposed achieved higher maximum load during compared pure Microstructure relieved while reveals strain-induced grain refinement. With geometry leading stress concentrations, deviation from yield values predicted conventional criteria observed; stress-strain data can be help assessing state aluminum structures after