Next Article in Journal
Microstructure and Mechanical Properties of Graphene-Reinforced Titanium Matrix/Nano-Hydroxyapatite Nanocomposites
Previous Article in Journal
Mechanisms and FEM Simulation of Chip Formation in Orthogonal Cutting In-Situ TiB2/7050Al MMC
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessArticle
Materials 2018, 11(4), 607; doi:10.3390/ma11040607

Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions

1
Tribology Research Institute, Key Lab of Advanced Technologies of Materials, Southwest Jiaotong University, Chengdu 610031, China
2
China Academy of Engineering and Physics, Mianyang 621900, China
*
Authors to whom correspondence should be addressed.
Received: 1 March 2018 / Revised: 11 April 2018 / Accepted: 12 April 2018 / Published: 16 April 2018
(This article belongs to the Special Issue Deformation, Fatigue and Fracture of Materials)
View Full-Text   |   Download PDF [38124 KB, uploaded 16 April 2018]   |  

Abstract

A fretting wear experiment with uranium has been performed on a linear reciprocating tribometer with ball-on-disk contact. This study focused on the fretting behavior of the uranium under different atmospheres (Ar, Air (21% O2 + 78% N2), and O2) and vacuum conditions (1.05 and 1 × 10−4 Pa). Evolution of friction was assessed by coefficient of friction (COF) and friction-dissipated energy. The oxide of the wear surface was evaluated by Raman spectroscopy. The result shows that fretting wear behavior presents strong atmosphere and vacuum condition dependence. With increasing oxygen content, the COF decreases due to abrasive wear and formation of oxide film. The COF in the oxygen condition is at least 0.335, and it has a maximum wear volume of about 1.48 × 107 μm3. However, the COF in a high vacuum condition is maximum about 1.104, and the wear volume is 1.64 × 106 μm3. The COF in the low vacuum condition is very different: it firstly increased and then decreased rapidly to a steady value. It is caused by slight abrasive wear and the formation of tribofilm after thousands of cycles. View Full-Text
Keywords: fretting wear; wear mechanism; atmosphere; uranium fretting wear; wear mechanism; atmosphere; uranium
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Li, Z.; Cai, Z.; Wu, Y.; Meng, X.; Zhang, D. Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions. Materials 2018, 11, 607.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top