Cold Welding Tendencies and Frictional Studies of Clean Metals in Ultra-High Vacuum

1 January 1967

journal article
research article
Published by Taylor & Francis in A S L E Transactions

Vol. 10 (2) , 146-157
https://doi.org/10.1080/05698196708972174

Abstract

The degree of cold welding in ultra-high vacuum (10⁻⁹ torr) was determined for 45 metal combinations. Static coefficients of friction were measured after stationary contact under 9.2-lb load for 300 hours at 200 C. Kinetic coefficients were measured at a velocity of 0.4 inch/second immediately after breakaway. Nearly all of the metal combinations tested exhibited maximum kinetic coefficients higher than the corresponding static coefficients. Metal transfer was from rider to ring when the rider was softer but followed no pattern when the ring was softer. Very little correlation was found between the friction characteristics of the metals and their physical properties.

Keywords

This publication has 2 references indexed in Scilit:

The adhesion of metals and factors that influence it
Wear, 1964
Friction, Wear, and Evaporation Rates of Various Materials in Vacuum to 10⁻⁷mm Hg
A S L E Transactions, 1962