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Effect of machining residual stresses on the repetitive impact behavior of silicon nitride

Published online by Cambridge University Press:  03 March 2011

Sreeram Srinivasan ,
Peter J. Blau  and
Julia L. Bjerke
Sreeram Srinivasan*
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6063
Peter J. Blau
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6063
Julia L. Bjerke
Affiliation:
Caterpillar Technical Center, Mossville, Illinois 61552
*
a)Present address: Sundram Fasteners Ltd., 1-10-63/1/1 Veer Chambers, II Floor, Begumpet, Hyderabad 500 016, India.
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Abstract

Silicon nitride is a candidate valve material for internal combustion engines. Its low density and attractive mechanical properties relative to conventional metallic alloys portend significant improvements in valve performance. The production of valves involves a significant amount of machining, especially grinding. Grinding of ceramic materials may result in surface and subsurface damage in the form of fracture or residual stresses which may affect impact behavior and, consequently, the behavior of silicon nitride ceramic materials as valves. The effects of residual stresses due to grinding on the impact wear behavior of one silicon nitride composition ground under various conditions have been investigated.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 1 , January 1995 , pp. 95 - 100
Copyright
Copyright © Materials Research Society 1995

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