Mechanical and Tribological Properties of Shot-Peened SAE 1070 Steel. Issue 5 (2nd September 2016)

• Record Type: Journal Article
• Authors: Khun, N. W.; Trung, P. Q.; Butler, D. L.
• Is Part Of: Tribology transactions. Volume 59:Issue 5(2016)
• Page Start: 932
• Page End: 943
• Publication Date: 2016-09-02
• Subjects: Shot peening -- SAE 1070 steel -- hardness -- friction -- wear; Tribology -- Periodicals; 621
• DOI: 10.1080/10402004.2015.1121313
• Languages: English
• ISSNs: 1040-2004

Abstract

ABSTRACT: The effects of shot peening pressure on the mechanical and tribological properties of shot-peened SAE 1070 steel strips were systematically investigated. The surface hardness of the shot-peened steel strips significantly increased with increased shot peening pressure due to the promoted cold work-hardening effect. The tribological results showed that the increased surface roughness of the shot-peened steel strips associated with increased shot peening pressure resulted in their increased friction by enhancing mechanical interlocking between two rubbing surfaces. The wear of the shot-peened steel strips decreased with increased shot peening pressure via their increased surface hardness. However, the shot-peened steel strips at shot peening pressures less than 345 kPa did not exhibit better wear resistance than the as-received steel strip, indicating that a certain intensity of shot peening was required to improve the wear resistance of the shot-peened steel strips. It could be concluded that the mechanical and tribological properties of the shot-peened steel strips were significantly influenced by the shot peening pressure.