The Importance of Variable Speeds under Extreme Pressure Loading in Molybdenum Disulfide Greases Using Four-Ball Wear Tests

Autor:	Gabi Nehme
Rok vydání:	2013
Předmět:	Materials science Mechanical Engineering Design of experiments Metallurgy Surfaces and Interfaces Welding Surfaces Coatings and Films law.invention chemistry.chemical_compound chemistry Mechanics of Materials law Grease Ball (bearing) Composite material Molybdenum disulfide
Zdroj:	Tribology Transactions. 56:977-985
ISSN:	1547-397X 1040-2004
Popis:	There is recent concern regarding grease behavior in extreme pressure applications. The research described here is aimed at providing good friction and wear performance while optimizing rotational speeds under extreme loading conditions. A design of experiment (DOE) was used to analyze molybdenum disulfide (MoS2) greases and their importance in reducing wear under extreme loading and various speeds conditions (schedule 1 and schedule 2 speeds). The lamellar structure of MoS2 provides very good weld protection by forming a layer that can be easily sheared under the applications of extreme pressures. An extreme load of 785 N was used in conjunction with different schedules of various rotational speeds to examine lithium-based grease with and without MoS2 for an equal number of revolutions. A four-ball wear tester was utilized to run a large number of experiments randomly selected by the DOE software. The grease was heated to 75°C and the wear scar diameters were collected at the end of each test. The result...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3a01b9e8eaf869fe217f895f5620ba21 https://doi.org/10.1080/10402004.2013.816812 Zobrazit plný text záznamu