Dynamic Constitutive Parameters Determination and Numerical Simulation Verification of HfZrTiTaNbCux High Entropy Alloy
Source abstract
Abstract
High entropy alloy has a wide application prospect in the field of national defense because of its unique design concept, excellent mechanical properties, and impact energy release characteristics. In this paper, HfZrTiTaNbCux (x = 0.2/0.8) refractory high entropy alloy was studied. The static/dynamic compression experiments of HfZrTiTaNbCux at different strain rates were carried out by universal testing machine and split Hopkinson pressure bar (SHPB), respectively. The static/dynamic compression stress–strain relationships of HfZrTiTaNbCux with different contents of trace elements were obtained. The Johnson–Cook dynamic constitutive equation parameters suitable for HfZrTiTaNbCux high entropy alloy were determined by fitting, and the accuracy of the dynamic constitutive equation parameters was verified by ABAQUS numerical simulation. The results showed that under quasi-static loading conditions, the I-II composite cracks occurred, and the material exhibited an obvious work hardening phenomenon. The yield strength and compressive strength of the high entropy alloy increased with the increase in Cu content, but the toughness decreased. The strain rate effect was obvious under dynamic loading. The fitting constitutive parameters can accurately predict the dynamic mechanical properties of HfZrTiTaNbCux high entropy alloy.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Entropy Alloys Studies · Metal and Thin Film Mechanics · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
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