Abstract
The present study describes erosive wear of hardened carbon steel on micro shot peening process. Alumina and glass beads having 50 μm in diameter was peened to the target steel surface using a developed peening apparatus. The erosive wear loss was measured with surface profile change. The micro hardness and the residual stress of the peened surface were evaluated. Results showed that the erosive wear loss of the alumina peened surface was considerably larger than that of the alumina peened surface. The larger increase of the hardness and the residual stress were found on the glass beads peened surface. The lateral crack growth was found on the subsurface layer of alumina peened specimen. Therefore, it is estimated that erosive wear results in removal of the hardened layer from the surface peened with alumina beads.
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