Mechanical and Tribological Properties of Shot-Peened SAE 1070 Steel |
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Authors: | N. W. Khun P. Q. Trung D. L. Butler |
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Affiliation: | 1. School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore;2. Advanced Remanufacturing and Technology Centre, Singapore |
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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. |
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Keywords: | Shot peening SAE 1070 steel hardness friction wear |
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