We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Modelling microplastic flow in an hpdc Mg-Al alloy
Summary
This study used a numerical micromechanical model to simulate how microplastic flow (microscale yielding) develops across the cross section of a cast magnesium-aluminum tensile specimen, showing that a softer core yields first and progressively transfers load to a harder outer skin. The model helps predict early deformation in lightweight cast metal components used in automotive and aerospace applications.
A numerical micromechanistic model is used to simulate the progressive development of microplastic flow across the cross section of cast to shape tensile specimen of a Mg-Al alloy, accounting for the strong gradient of yield strength between the softer core and the harder periphery of the section, or skin. While maintaining iso-strain and iso-stress conditions across the entire section, the onset of microyielding at the core increasingly sheds load onto the elastic skin, which reacts by applying an increasing elastic constraint on the core. In the process the skin becomes thinner while the core expands. The speed of the interface between the plastic core and elastic skin that moves outwardly with the applied stress can be quantified and the onset of full plasticity across the entire cross section readily identified.