ENGINE BEARING OVERLAYS: THE EFFECT OF OVERLAY COMPOSITION ON DIFFUSION AND POST-DIFFUSION BEARING PERFORMANCE
At engine temperature the loss of tin and copper from the overlay of lead-tin overlay plated crankshaft bearings can result in a corrosion prone overlay and a reduction in bearing life. A nickel barrier between the overlay and the lining offers only a partial solution to the problem. New data for the effect on diffusion rate of the original tin and copper contents of lead-tin-copper overlays have a major effect on diffusion rate, as do the choice of barrier and its quality. The mechanisms operating during diffusion are illustrated by x-ray maps obtained on the scanning electron microscope. Data for the post-diffusion corrosion and cavitation erosion resistance of overlays have been obtained. The results demonstrate the importance of heat-treatment at engine temperature prior to the assessment of overlay performance.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
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Supplemental Notes:
- International Congress and Exposition, Detroit, Michigan, February 28-March 4, 1983.
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Corporate Authors:
Society of Automotive Engineers (SAE)
400 Commonwealth Drive
Warrendale, PA United States 15096 -
Authors:
- PRATT, G C
- Whitney Jr, W J
- Publication Date: 1983
Media Info
- Features: Figures; References;
- Pagination: 13 p.
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Serial:
- SAE Technical Paper
- Publisher: Society of Automotive Engineers (SAE)
- ISSN: 0148-7191
- EISSN: 2688-3627
- Serial URL: http://papers.sae.org/
Subject/Index Terms
- TRT Terms: Bearings; Copper; Corrosion; Diffusion (Optics); Durability; Engines; Lead (Metal); Metal heating; Performance; Tin
- Uncontrolled Terms: Heat treatment
- Subject Areas: Safety and Human Factors; Vehicles and Equipment;
Filing Info
- Accession Number: 00377484
- Record Type: Publication
- Source Agency: National Highway Traffic Safety Administration
- Report/Paper Numbers: SAE 830063, HS-034 605
- Files: HSL, USDOT
- Created Date: Sep 30 1983 12:00AM