Superior fretting wear resistance of 30Nb5Ta30Ti15V20Zr refractory high entropy alloy in a comparison with Ti6Al4V

• Published in: Materials letters 2023-05, Vol.339, p.134105, Article 134105
• Main Authors: Thirathipviwat, Pramote, Onuki, Yusuke, Vishnu, Jithin, Kesavan, Praveenkumar, Raheem, Ansheed, Manivasagam, Geetha, V Shankar, Karthik, Hasegawa, Makoto, Sato, Shigeo
• Format: Article
• Language: English
• Subjects: Fretting wear resistance; High entropy alloys; Titanium alloys
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2023.134105

•A newly developed 30Nb5Ta30Ti15V20Zr shows a superior fretting wear resistance.•The fretting regimes between 30Nb5Ta30Ti15V20Zr and Ti6Al4V are different.•A partial slip regime is a main fretting wear mechanism in 30Nb5Ta30Ti15V20Zr.•Low CoF and wear loss are resulted by a partial slip regime and self-lubricate oxide. A newly developed single BCC phase 30Nb5Ta30Ti15V20Zr refractory high entropy alloy (RHEA) has been designed for low density, high mechanical properties, and superior fretting wear resistance. In this study, we focus on the study of the fretting wear resistance in a comparison with Ti6Al4V alloy. The 30Nb5Ta30Ti15V20Zr demonstrated the better fretting wear resistance with low friction coefficient and wear loss. The phase constituent, crystal structure and mutual interaction of complex composition in 30Nb5Ta30Ti15V20Zr contribute to improving the fretting wear resistance. The superior fretting wear resistance increases candidacy potential of the 30Nb5Ta30Ti15V20Zr RHEA for structural applications, especially under fretting conditions.