Wear behaviors and wear mechanisms of several alloys under simulated deep-sea environment covering seawater hydrostatic pressure

• Published in: Tribology international 2012-12, Vol.56, p.38-46
• Main Authors: Wang, Jianzhang, Chen, Jun, Chen, Beibei, Yan, Fengyuan, Xue, Qunji
• Format: Article
• Language: English
• Subjects: Alloys; Applied sciences; Aqueous lubrication; Austenitic stainless steels; Exact sciences and technology; Fracture mechanics (crack, fatigue, damage...); Friction, wear, lubrication; Fundamental areas of phenomenology (including applications); Hydrostatic pressure; Machine components; Mechanical engineering. Machine design; Metal; Nickel base alloys; Physics; Sea water; Solid mechanics; Structural and continuum mechanics; Superalloys; Titanium base alloys; Wear; Wear mechanism; Wear rate
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2012.06.021

The wear behaviors of self-mated 316 steel, Hastelloy C-276, Inconel 625 and Ti6Al4V alloy were evaluated under simulated deep-sea environment involving hydrostatic pressure of seawater. It was found that the wear rates of the four tested alloys were well correlated with the seawater hydrostatic pressure in a form of first-order exponential decay. Self-mated 316 steel, Hastelloy C-276 and Inconel 625 were dominated by delamination wear, and their wear rates increased with the increase of seawater hydrostatic pressure. Self-mated Ti6Al4V, however, was subject to abrasive wear, and its wear rate sharply decreased with the increase of seawater hydrostatic pressure. ► Wear behaviors of some alloys in simulated deep-sea environment are investigated. ► Wear rates of the alloys well correlate with the seawater hydrostatic pressure. ► The correlations are in a form of first-order exponential decay. ► Ti6Al4V alloy possesses excellent wear-resistance under deep-sea environment.