유효한 알멘강도로 숏피닝된 STS316 강의 수소취화에 대한 피로수명 향상에 관한 연구 A Study on the Improvement of Fatigue Life against Hydrogen Embrittlement of STS316 Steel Peened with Effective Almen Intensity
pp.424-432
In this paper, a shot peening was conducted to improve fatigue life by increasing resistance to hydrogen embrittlement of STS316 steel, which is widely used in hydrogen environments. First, considering the efficiency of the shot peening process, an effective Almen intensity was selected and applied to the specimen surface. Second, the specimen was hydrogen embrittled at room temperature (25°C) and high temperature (60°C) using electrochemical hydrogen charging. Third, the mechanical property tests (tensile, hardness, roughness) and 4-points rotational bending fatigue tests of the specimen were performed. All mechanical properties decreased, but the fatigue life of the shot peened specimens improved at the both temperature conditions. Ultimately, the fatigue characteristics against hydrogen embrittlement of STS316 steel, which is used in various industrial fields, are improved through an effective shot peening process, and the effect is believed to be very significant.