Wear rate impact on Ti-6Al-4V fretting crack risk: Experimental and numerical comparison between cylinder/plane and punch/plane contact geometries

Fretting Wear Behavior and Damage Mechanisms of Inconel X-750 Alloy in Dry Contacts

“…However, the friction dissipation in GSR, correlated with the plastic flow, delamination, and oxidation wear mechanisms, causes a large amount of surface damage by extending the contact area and reducing the contact pressure profile ( Figure 11). e main damage mechanisms, i.e., cracking (fretting induced by fatigue) and material loss (fretting induced by wear), are often appear as a competing process which was extensively explored during the last decade [1,3,5,6,[31][32][33][34]. For instance, the material loss during GSR can eliminate small cracks or fill up the opening of a deep crack and accommodate the main portion of the imposed displacement; as a consequence, it strongly reduces the slip amplitude and then the debris formation.…”

On the Role of Contact and System Stiffness in the Measurement of Principal Variables in Fretting Wear Testing

“…Another work belonging to the same research group is also analysed. In this case, Peteghem et al [21] used a similar tribosystem configuration to the one employed by Arnaud et al [10]. Contacting bodies were made of the same titanium alloy as in [10], although in this case the cylinder radius and the contact out of length are larger than the ones used in Arnaud et al [10].…”

“…The first tribometer analysed in this work is the one used by Arnaud et al [10]. They used a cyl.-to-flat (CTF) contact configuration, both specimens were made of a titanium alloy.…”

“…The displacement was recorded directly from the overall displacement imposed in the hydraulic actuator. Arnaud et al [10] also tested a flat-to-flat with rounded edges configuration, which has a great interest because of its wide use in industrial applications. In addition, they observed some relative micro-rotation of the contacting bodies using digital image correlation during the tests, which led to contact misalignment.…”

“…However, in specific applications such as steam generator tubes, fiber Fabry-Perot force sensors with reduced volume and high performance have been developed to assess the fretting damage [13,14]. In the literature, it is common to found screw-type mechanisms attached to springs [12,15,16], deadweight mechanisms [11,[17][18][19][20] or servo-hydraulic systems [10,21,22] to apply a constant normal contact load. The fretting motion and tangential or bulk load are usually imposed using servo-hydraulic systems [16,[22][23][24], mechanical linkages [15,19] or piezo-electric actuators [17,20] depending on the load requirements in terms of frequency and magnitude.…”