Thermo-mechanical characterization and dynamic failure of a CoCrFeNi high-entropy alloy
نویسندگان
چکیده
This paper investigates the thermo-mechanical constitutive relationships of a CoCrFeNi high-entropy alloy (HEA) from quasi-static 10−2/s, medium strain rate 101/s to high rates 5 × 102/s-1.1 104/s. A series tests, with use cylindrical specimen and shear compression (SCS), were performed on hydraulic Instron machine split Hopkinson pressure bar (SHPB) synchronized high-speed camera. The temperature rise (self-heating) during deformation is evaluated experimentally. Effects environmental temperatures dynamic flow response are studied using SHPB an chamber. HEA present noticeable sensitivity. shows exceptional resistance failure, equivalent failure about 173%. Microstructural examinations illustrate that fails by adiabatic banding. comparison responses eight different metals alloys made. reveals potential in impact resistant applications aerospace engineering armour design.
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ژورنال
عنوان ژورنال: Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
سال: 2022
ISSN: ['0921-5093', '1873-4936']
DOI: https://doi.org/10.1016/j.msea.2022.143166