TY  - JOUR
T1  - Evaluation of Tribological and Electrochemical Properties of Multiphase CoCuFeNiNb High Entropy Alloy
TT  - Çok Fazlı CoCuFeNiNb Yüksek Entropili Alaşımın Tribolojik ve Elektrokimyasal Özelliklerinin Değerlendirilmesi
AU  - İcin, Kürşat
AU  - Sünbül, Sefa Emre
PY  - 2024
DA  - June
Y2  - 2024
DO  - 10.54370/ordubtd.1495311
JF  - Ordu Üniversitesi Bilim ve Teknoloji Dergisi
JO  - Ordu Üniv. Bil. Tek. Derg.
PB  - Ordu Üniversitesi
WT  - DergiPark
SN  - 2146-6440
SP  - 176
EP  - 190
VL  - 14
IS  - 1
LA  - en
AB  - Recent research has heavily focused on high entropy alloys (HEAs) due to their promising potential for diverse industrial applications. This study investigates the CoCuFeNiNb alloy, analyzing its structural, tribological, and electrochemical characteristics. The alloy was synthesized using vacuum arc melting in an argon environment and was subsequently examined through X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), wear testing, and corrosion analysis. The tribological and electrochemical performances were assessed through wear and corrosion experiments. The results reveal that the alloy contains FCC, BCC, and Laves phases. The coefficient of friction for the CoCuFeNiNb high entropy alloy increased to 0.28, 0.5, and 0.78 under loads of 0.25 MPa, 0.5 MPa, and 1 MPa, respectively. Observations of the wear surface showed abrasion wear at low pressure, delamination layers at medium pressure, and plastic deformation zones at high pressure. In a 3.5 wt% NaCl solution, the alloy exhibited a corrosion potential of -0.236 V and a corrosion current density of 1.89×10⁻⁵ A/cm².
KW  - high entropy alloy
KW  - vacuum arc melting
KW  - tribological properties
KW  - corrosion properties
N2  - Yüksek entropili alaşımlar (YEA'lar), son yıllarda yoğun araştırmalara konu olmuş ve farklı endüstriyel uygulamalara yönelik potansiyel göstermektedir. Bu çalışma, CoCuFeNiNb alaşımının yapısal, tribolojik ve elektrokimyasal özelliklerini incelemektedir. Alaşım, Ar atmosferinde vakumlu ark eritme yöntemi ile hazırlanmış ve XRD, SEM, EDX, aşınma ve korozyon analizleri ile karakterize edilmiştir. Aşınma testleri ve korozyon deneyleri, alaşımın tribolojik ve elektrokimyasal performansını değerlendirmiştir. Bulgular, alaşımın YMK, HMK ve Laves fazlarından oluştuğunu göstermektedir. CoCuFeNiNb yüksek entropili alaşımının sürtünme katsayısı, 0.25 MPa, 0.5 MPa ve 1 MPa yük altında sırasıyla 0.28, 0.5 ve 0.78 olarak artış göstermiştir. Aşınma yüzeyinde düşük basınçta abrazyon izleri, orta basınçta delaminasyon tabakaları ve yüksek basınçta plastik deformasyon bölgeleri gözlemlenmiştir. CoCuFeNiNb alaşımının %3,5 NaCl çözeltisindeki korozyon potansiyeli -0,236 V ve korozyon akım yoğunluğu 1,89×10⁻⁵ A/cm² olarak belirlenmiştir.
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UR  - https://doi.org/10.54370/ordubtd.1495311
L1  - http://dergipark.org.tr/tr/download/article-file/3979214
ER  -