An atomic-level understanding of the friction and wear behaviors of Ti2AlN/TiAl composite via MD simulations. (September 2019)

• Record Type: Journal Article
• Authors: Han, Xiuli; Liu, Pei; Sun, Dongli; Wang, Qing
• Is Part Of: Tribology international. Volume 137(2019)
• Page Start: 340
• Page End: 348
• Publication Date: 2019-09
• Subjects: Ti2AlN/TiAl composite -- Molecular dynamics simulations -- Friction and wear -- Dislocation movement; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2019.05.021
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: In this work, MD simulations are applied to investigate the friction and wear properties of Ti2 AlN/TiAl composite. It is found that the introduction of Ti2 AlN and elaborate design of interface structure can realize the goal of anti-friction and wear reduction for Ti2 AlN/TiAl composite, because the introduction of Ti2 AlN can cause the strengthening effect and the interface can effectively block dislocation propagation. It is also found that the form and shape of pile-up depends strongly on the frictional direction, because different dominant slip systems are activated. In addition, the dislocation morphology and density in the Ti2 AlN/TiAl composite varies with the frictional speed and temperature, causing the different friction and wear behaviors. Graphical abstract: Image 1 Highlights: The introduction of Ti2 AlN in TiAl can realize the anti-friction and wear reduction. Elaborate design of interface structure can improve the friction/wear behavior of Ti2 AlN/TiAl composite. The form and shape of pile-up depends strongly on the frictional direction. Sliding speed and temperature have an influence on the friction/wear behavior of Ti2 AlN/TiAl composite.