Effect of Compressive Residual Stress on the High Temperature fatigue Crack Propagation Behavior of Shot-peened Spring Steel

J. Ocean Eng. Technol. 2002;16(5):73-79.

압축잔류응력이 스프링강의 고온환경 피로균열 진전거동에 미치는 영향

정찬기,박경동

대원강업 창원공장,부경대학교 기계공학부

Keywords: Compressive Residual Stress, Fatigue Crack Propagation, Spring Steel, Shot-peening, Striation

핵심용어: 압축잔류응력, 피로균열진전, 스프링강, 쇼트피닝, 스트라이에이션

Abstract

In this paper, the effect of the compressive residual stresses was obtained at the test conditions of the higher temperature than the ambient temperature. The examination was performed with the CT specimen result of the material(JISG SUP9) which is being commonly used for the marine engine parts and the ocean structures. As a result, the test conditions at the higher temperature were acquired considering the peak values of the compressive residual stresses of the specimens and the effect on the fatigue crack propagation speed da