Temperature-mediated tribological characteristics of 40CrNiMoA steel and Inconel 718 alloy during sliding against Si 3 N
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ISSN 2223-7690 CN 10-1237/TH
RESEARCH ARTICLE
Temperature-mediated tribological characteristics of 40CrNiMoA steel and Inconel 718 alloy during sliding against Si3N4 counterparts Liuyang BAI1,2, Shanhong WAN1,2,*, Gewen YI1,2,*, Yu SHAN1, Sang The PHAM3, Anh Kiet TIEU3, Yan LI4, Rendong WANG5 1
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2
Center of Materials Science and Opto-Electronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3
Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong 2522, Australia
4
State Key Laboratory of Metal Materials for Marine Equipment and Application, Anshan 114009, China
5
Ansteel Iron & Steel Research Institute, Anshan 114009, China
Received: 10 March 2020 / Revised: 30 July 2020 / Accepted: 23 September 2020
© The author(s) 2020. Abstract: A comparative evaluation of the friction and wear behaviors of 40CrNiMoA steel and Inconel 718 alloy sliding against SiN counterparts was conducted over a large temperature range from room temperature (RT) to 800 ℃. The temperature‐dependent tribological properties associated with the resulting chemical mitigation and structural adaptation of the solid sliding surface were clarified by surface/interface characterizations. The results revealed desirable performance in reducing friction and wear at elevated temperatures, which was associated with the resulting oxide composite filmʹs adaptive lubricating capability, whereas severe abrasive wear occurred at room/ambient temperatures. The oxidative‐abrasive differentials for the two alloys were further discussed by considering the combined effect of temperature and stressed‐shearing conditions. Keywords: steel alloys; high‐temperature tribology; wear and friction; oxidation; surface/interface chemistry
1 Introduction High‐temperature tribological characteristics of high‐strength alloyed materials have been studied considerably in aerospace, power generation, material processing, and metalworking industries. A series of problems occur simultaneously between frictional contacts, such as abrasion, plastic deformation, and fatigue [1]. During high‐temperature friction, oxides preferentially form on the worn surface [2], and their thicknesses play a pivotal role in tribological performance [3]. If the tribochemically
grown oxide layer behaves effectively, it can deliver the desired lubricity between the rubbing contacts at elevated temperatures [4]. However, not all in situ grown oxide layers perform favorably. Temperature has a significant effect on tribological varieties of alloyed materials [5, 6]. Thus, attempts to comprehend the tribological capabilities and underlying mechanism of alloyed materials in terms of microstructure transition and composit
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