INFLUENCE OF STRESS STATE ON ABRASIVE WEAR OF STEELS

Citation
S. Spuzic et al., INFLUENCE OF STRESS STATE ON ABRASIVE WEAR OF STEELS, Wear, 184(1), 1995, pp. 83-86
Citations number
7
Categorie Soggetti
Material Science","Engineering, Mechanical
Journal title
WearACNP
ISSN journal
00431648
Volume
184
Issue
1
Year of publication
1995
Pages
83 - 86
Database
ISI
SICI code
0043-1648(1995)184:1<83:IOSSOA>2.0.ZU;2-S
Abstract
The resistance of materials to abrasive wear depends on many factors t hat can be generally classified as material-based or operating system- based. In the published wear models, the bulk stress state or stress h istory of worn material do not appear as influencing factors. Followin g the analogy with stress corrosion and fatigue, as well as with cycli c softening of steel materials, the possible influence of bulk stress state and stress history on abrasive wear of steels has been examined. Preliminary experiments were carried out using a scratch tester with a diamond indenter. Hypoeutectoid steel specimens were bent to obtain tensile or compressive stress and then scratched in situ under a norma l load of 25-40 N. The results of the screening experiments indicate t hat the depth of grooves and the wear mechanism differ, depending on w hether the specimens are under tension or compression. Tensile stress favours micro-cutting, while a compressive state apparently maintains microploughing. The pilot experiments, conducted with a hypereutectoid steel, indicate (with a confidence 80%) the significant influence of stress history, i.e. cyclic stressing, on abrasive wear. Further analy ses, combined with detailed observation using scanning electron micros copy, have allowed discussion and explanation of these phenomena.