نویسنده
Radi, Amin, Sajadifar, S., Seyedmohammadi, Seyedveghar, Krochmal, M., Bolender, A., Wegener, T., Niendorf, T., Yapıcı, Güney Güven
تاریخ انتشار
2023-08
محل انتشار
-
Elsevier
موضوع
High entropy alloy (HEA), Low-cycle fatigue (LCF), Microstructure, Thermo-mechanical processing (TMP), Transformation induced plasticity (TRIP), Twinning induced plasticity (TWIP)
نوع
دوره ای
زبان
انگلیسی
دیجیتال
بله
نسخه خطی
خیر
کتابخانه
دانشگاه اوزیغین
شناسه دارایی کتابخانه
0142-1123
شماره ثبت
40bede1a-7c68-441b-9d92-71a1c961986c
محل کتابخانه
Mechanical Engineering
تاریخ
2023-08
یادداشتها
Deutsche Forschungsgemeinschaft
متن نمونه
A multi-phase non-equiatomic FeCrNiMnCo high entropy alloy (HEA) was fabricated using vacuum induction melting. Thermo-mechanical treatments consisting of cold rolling and annealing at 750 °C and 850 °C were employed to improve the mechanical properties of the HEA in focus. Tensile experiments revealed that yield strength and ultimate tensile strength levels can be enhanced significantly after thermo-mechanical processing (TMP). At the same time, ductility remains at an adequate level. Strain-controlled low-cycle fatigue (LCF) experiments were carried out in order to assess the mechanical properties of this HEA under cyclic loading conditions. At the same strain amplitude, the stress levels of the processed samples were considerably higher than that of the as-received counterpart. Similarly, fatigue lives of the former could surpass the base condition at the strain amplitudes of 0.2% and 0.4%; however, at the higher strain amplitudes, cyclic softening was observed. Electron backscatter diffraction (EBSD) and X-ray diffraction (XRD) results revealed that phase transformation from face-centered cubic (FCC) to body-centered cubic (BCC/B2) took place at a higher occurrence with increasing strain amplitude (0.2% to 0.6%). Furthermore, transmission electron microscopy (TEM) studies confirm that upon tensile deformation additional plasticity mechanisms, i.e., deformation twinning and phase transformation, contribute to the overall mechanical behavior of the multi-phase HEA.
DOI
10.1016/j.ijfatigue.2023.107678
Cilt
173
