Mechanical and tribological properties of shot-peened SAE 1070 steel

N. W. Khun, P. Q. Trung, D. L. Butler

Research output: Contribution to journalArticle

6 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)932-943
Number of pages12
JournalTribology Transactions
Volume59
Issue number5
DOIs
Publication statusPublished - 2 Sep 2016
Externally publishedYes

Keywords

  • friction
  • hardness
  • SAE 1070 steel
  • Shot peening
  • wear

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