Effect of Internal Stress on the Wear Behavior of Steel during Boundary Lubrication

Abstract

The effect of internal stress on wear was investigated under boundary lubrication conditions. In most cases, the wear increased by tensile stress, particularly with active EP additives such as dilaurly hydrogen phosphite. On the other hand, the wear with oiliness improvers and inactive EP additives such as tricresyl phosphate was practically unaffected by stress.

The stress-enhanced wear was explained as due to the accelerated corrosion caused by stress-induced surface heterogeneity. This possibility was supported by the experimental results of corrosion reaction under tensile stress. With respect to oiliness improvers and inactive EP additives, tensile stress seemed to be beneficial in forming antiwear films.

Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference held in Atlanta, Georgia, October 16–18, 1973

Notes

Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference held in Atlanta, Georgia, October 16–18, 1973