|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Combined Experimental and Numerical Investigation of Ductile Fracture in the Cantor Alloy
||Ahmed Ataya, Joshua Herrington, Shi-Hoon Choi, Amine Benzerga
|On-Site Speaker (Planned)
The ductile fracture of the CoCrFeMnNi high-entropy alloy was investigated. Round notched and unnotched bars were deformed to fracture in tension in order to determine the influence of stress triaxiality. Some bars were interrupted near macrocrack initiation. Fractographic analysis reveals a failure mechanism dominated by void nucleation at second-phase particles, followed by growth to coalescence. Dimple size measurements were acquired in-plane and depth-wise using a profilometer. The finite element method was utilized to analyze notched bars using constitutive relations of porous material plasticity. With nearly no fitting damage parameters, the constitutive model allowed for a good prediction of failure strains. Furthermore, unit cell calculations were carried out for a periodic array of voids in a J2 matrix under remote triaxial loadings after calibrating the plasticity parameters. This simple approach allowed for a good prediction of the fracture locus as well as the deformed void dimensions.
||Planned: Metallurgical and Materials Transactions