Characterisation of friction behaviour of flake, spheroidal, and compacted vermicular graphite cast irons Online publication date: Sat, 24-Jan-2015
by Kyungmok Kim; Myung-Jin Yoon
International Journal of Surface Science and Engineering (IJSURFSE), Vol. 9, No. 1, 2015
Abstract: This paper investigates friction behaviour of flake, spheroidal, and compacted vermicular graphite cast irons used for piston rings of automobile engines. Pin-on-disc friction tests are conducted under dry and room temperature conditions. Pins are made of graphite cast irons, and discs are chromium molybdenum steels. During a test, Coulomb friction coefficient and sliding distance are recorded. Graphite size fraction on the initial surface of the cast iron is determined and its influence on friction coefficient is investigated. Results show that friction coefficient growth rate during the 'running-in' period can be expressed as a power-law function of sliding distance. Two parameters in the power-law form, the damage rate constant and the damage exponent, can describe a friction coefficient evolution during the period. It is identified that graphite size fraction has an influence on a friction coefficient evolution. The influence of graphite size in cast iron is described with the damage rate constant.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Surface Science and Engineering (IJSURFSE):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook