Microstructural and Mechanical Characterization of the Aging Response of Wrought 6156 (Al-Mg-Si) Aluminum Alloy

The impact of the artificial aging response on microstructure and tensile mechanical properties aluminum alloy 6156 was investigated. Specimens were artificially aged at three different temperatures for various holding times to investigate all possible conditions, including under-aged (UA), peak-aged (PA) over-aged (OA) tempers. Microstructural investigation as well tests performed immediately after isothermal heat treatment. An almost 50% increase in yield stress (around 340 MPa) noticed PA temper this attributed precipitation ?? Q? phases, consistent with modelling predictions. This high value is accompanied by values elongation fracture (>10%) that essential damage tolerance applications. lack large or interconnected grain boundary precipitates contributes elongation. Slanted both UA tempers, exhibiting a typical ductile shear mechanism. At OA temper, coarsening along broadening precipitate free zones resulted reduction strengthening effectiveness precipitates, small ductility approximately 12% noticed.