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Waterjet Peening에 의한 SUP9강의 압축잔류응력 유발 최적조건
서용위(Yongwie Seo),조지룡(Ji Ryong Cho),임익섭(Ik-Sub Lim),여명헌(Myeong-Heon Yeo) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.11
Waterjet peening of spring steel SUP9 was conducted in-air to investigate the optimum peening conditions for the induced compressive residual stress which is beneficial to improve the endurance limit. The erosion-peening transition was identified as a critical standoff distance within the experimental envelope. Using X-ray diffraction technique the residual stresses generated by the waterjet peening was measured and analyzed to characterize the optimum peening conditions for the maximum compressive stress on the specimen surface. Also the surface roughnesses of peened specimen were measured at the non-eroded surfaces and the results represented the superior surface quality with minimal changes in surface topography before and after the peening process.