ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Wear and scuffing tests were conducted using friction and wear measurement of pistonrings and cylinder blocks for the low friction diesel engine. Scuffing, described as suddencatastrophic failure of lubricated sliding surfaces, usually characterized by a sudden rapid increasein friction, temperature and noise, is an important failure mode on sliding surfaces. In this study, thefrictional forces, wear amounts and cycles to scuffing in boundary lubricated sliding condition weremeasured using the reciprocating wear tester. The cylinder blocks with several values of surfaceroughness were used as reciprocating specimens, and a piece of piston ring was used as fixed pin.As increasing load by several steps in lubricated sliding, the friction signals indicated the state ofsurface interactions, such as friction forces, changes of lubricating films and scuffing. There weresome rapid increases in friction forces just before the scuffing would occur. It was found that therewas the optimum value of initial surface roughness to prolong the wear life of sliding surfaces. Asdecreasing the surface roughness of cylinder blocks, the wear amounts were decreased due toincreasing the contact area. There was also the optimum surface roughness to reduce the frictionand to prolong the scuffing life
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.713.pdf
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