Running-In and Scuffing Studies

Cavatorta, M.P.; Whittenhall, J.; Cusano, C.

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https://hdl.handle.net/2142/11905 Copy

Description

Title

Running-In and Scuffing Studies

Author(s)

• Cavatorta, M.P.
• Whittenhall, J.
• Cusano, C.

Issue Date

1999-09

Keyword(s)

• running-in
• starved lubrication
• surface film formation
• friction
• wear

Abstract

In Part I of this two part paper, extensive surface analysis is done to examine surface changes caused by different run-in procedures on 390-T6 aluminum pins sliding against 1018 carburized steel disks. The area contact is lubricated by a base polyalkylene glycol (P AG) lubricant mist carried by a tetrafluoroethane (R134a) refrigerant gas under starved lubrication conditions. Run-in pressure, velocity and time as well as the effect of the friction coefficient during run-in are examined. Limited data are also obtained for different degrees of starvation. Surface traces of the pin specimens show that changes in the profile are limited to the first minutes of sliding. Longer run-in times allow for the formation of iron oxides as well as AI-Fe intermetallic compounds on the aluminum pins. The iron transfer to the pin is due to the abrasive action of the silicon particles on the steel disk.

Publisher

Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.

Series/Report Name or Number

Air Conditioning and Refrigeration Center TR-157

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/11905

Sponsor(s)/Grant Number(s)

Air Conditioning and Refrigeration Project 82

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