Effects of sliding speed on the tribological behavior of AA 7075 petroleum casing in simulated drilling environment. (May 2020)

• Record Type: Journal Article
• Authors: Mao, Liangjie; Cai, Mingjie; Liu, Qingyou; He, Yufa
• Is Part Of: Tribology international. Volume 145(2020)
• Publication Date: 2020-05
• Subjects: Aluminium alloy 7075 -- Petroleum casing -- Tribological behavior -- Wear mechanism; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2020.106194
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: This work investigated the effects of sliding speed on tribological behavior of AA 7075 petroleum casing in simulated drilling environment by pin-on-disc wear test. The main wear mechanism of AA 7075 disc at low sliding speed (0.0628 m/s and 0.157 m/s) was abrasive wear and oxidative wear at middle sliding speed (0.314 m/s). As sliding speed increases to higher sliding speed (0.471 m/s and 0.628 m/s), adhesive delamination wear dominated the wear process. The tribo oxides layer can efficiently protected the alloy substrate only at sliding speed of 0.314 m/s. At higher sliding speeds, tribo oxides layer were removed quickly once it was formed due to its internal fractures of tribo oxides and lower bonging strength with substrate. Highlights: Effects of sliding speed on tribological behavior of AA 7075 oil casing are presented. Best wear resistance of AA 7075 was observed at sliding speed of 0.314 m/s. The performance of tribo oxides layers is the key point of wear mechanism transition. Tribo oxides layer are formed and removed rapidly at a higher sliding speed.