A New Approach to Determine Tensile Stress-Strain Evolution in Semi-Solid State at Near-Solidus Temperature of Aluminum Alloys

Accurate determination of the materials’ strength and ductility in semi-solid state at near-solidus temperatures is essential, but it remains a challenging task. This study aimed to develop new method determine stress-strain evolution aluminum alloys within Gleeble 3800 unit. Stress was determined by newly developed “L-gauge” method, which converted displacement “restrained” jaw, measured using an L-gauge, into force. gives possibility flow stress more accurately, especially for very low rang (1–10 MPa) temperatures. The digital image correlation technique implemented unit allowed effective measurement heterogeneous strain fields evolving specimen under tensile loading. Therefore, curves help better understand alloy’s susceptibility hot tearing. results AA6111 alloy different liquid fractions (2.8% 535 °C 5.8% 571 °C) were demonstrated. reliable data heterogenous distribution are beneficial thermomechanical models hot-tearing criteria.