File : pdf presentation, 1.7 MB, 19 pages
Contents
Definitions for Scuffing
Characteristics of Scuffing
Historical Attempts to Define Critical Scuffing Criteria
Some Problems with Critical Scuffing Criteria based solely on Mechanics
Current Scuffing Tests Popularly Use Stepped Loading to Determine Critical Loads
Some ASTM Standards Used to Quantify Scuffing-Related Performance of Oils
ORNL’s Approach to Scuffing Measurement Case Study : Fuel Injector Plungers
Development of the ‘Pin-on-Twin’ Test
First experiments evaluated 52100 steel in #2 Diesel fuel and a low sulfur fuel (‘Jet A’)
Friction Trace Comparison Method Enables Initiation to be Detected
Scuffing Map Portrays Initiation and Spread of Surface Damage on Cylindrical Plungers
New Multi-Stage Scuffing Model Includes both Lubricant and Materials Effects
Case Study II: High-Temperature Scuffing of Wastegate Bushing Materials for EGR Systems
Multiple Criteria were used to create Scuffing Severity Maps
Biodiesel Additive Issues
Summary
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