Effects of Al on the Phase Volume Fractions and Wear Properties in the AlxCoCrFeMoNi High Entropy Alloy System

Gaşan H., Lökçü E., Ozcan A., Çelik O. N., Çelikyürek İ., Ulutan M., ...Daha Fazla

METALS AND MATERIALS INTERNATIONAL, cilt.26, sa.3, ss.310-320, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 26 Sayı: 3
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/s12540-019-00332-0
  • Dergi Adı: METALS AND MATERIALS INTERNATIONAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.310-320
  • Anahtar Kelimeler: High entropy alloys, Wear, Rietveld analysis, CALPHAD, SOLID-SOLUTION PHASE, MECHANICAL-PROPERTIES, MICROSTRUCTURE, BEHAVIOR, STABILITY
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

A detailed investigation was carried out to study the effect of Al on the phase volume fractions and wear properties in the AlxCoCrFeMoNi high entropy alloy (HEA) system. The analysis of phases was studied by X-ray diffraction for further Rietveld refinement was performed to determine the volume fraction of phases. In order to accomplish experimental studies, the volume fraction of phases has been analyzed by CALPHAD based simulations. The wear behavior of HEAs were studied under dry sliding conditions using a ball-on-disc geometry. The alloy system includes FCC, sigma, B2 and BCC phases and exhibits a broad range of phase transformations with varying Al content. The wear behavior of HEAs, in the present work, is correlated with their volume fraction of phases and hardnesses. The minimum wear rate, 3.04x10(-5) mm(3)/(Nm), is observed in A(1.5)CoCrFeMoNi alloy containing relatively hard sigma, B2 and BCC phases, which has a maximum hardness 829.8 HV.