NDLI: Sliding Wear Behavior of Cast Iron: Influence of MoS$_{2}$ and Graphite Addition to the Oil Lubricant

Content Provider	Springer Nature Link
Author	Prasad, B. K. Rathod, S. Yadav, M. S. Modi, O. P.
Copyright Year	2010
Abstract	The present study discusses sliding wear characteristics of a gray cast iron over a range of applied loads in oil lubricated condition. Effects of MoS$_{2}$ and graphite addition to the oil lubricant in governing the wear behavior have also been studied. The wear rate increased with load in general with a few exceptions in the case of oil plus 5% MoS$_{2}$ wherein it had a tendency to show a reverse trend in the intermediate load range. Addition of 5% graphite to the oil brought about a decrease in the wear rate without affecting seizure resistance. Increasing quantity of graphite in the oil from 5 to 10% practically did not affect the wear rate at lower loads. However, it led to significantly lower wear rates at higher loads and also offered higher seizure resistance. In the case of oil plus 5% MoS$_{2}$ lubricant mixture, the wear rate of the samples was higher than that of the lubricant with 5% graphite when tests were conducted at lower loads while identical response was observed at higher loads in both cases. Seizure resistance of the samples was not affected by the addition of 5% graphite and MoS$_{2}$ to the oil. The frictional heating also increased with load in general, except in the case of oil containing 5% MoS$_{2}$ and 10% graphite wherein it remained practically unaffected in the intermediate load range. The presence of 5% graphite and MoS$_{2}$ in the oil lubricant brought about reduced frictional heating, except in the case of oil plus 5% graphite mixture wherein the trend reversed, and oil plus 5% MoS$_{2}$ leading to comparable frictional heating during specimen seizure. Increasing test duration caused higher frictional heating. Adhesion was observed to be the principal wear mechanism while microcracking assisted delamination and abrasion also contributed to material loss.
Starting Page	445
Ending Page	455
Page Count	11
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	20
Issue Number	3
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2010-06-29
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cast iron graphite MoS$_{2}$ oil sliding wear solid lubricant Engineering Design Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Materials Science Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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