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
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.
목차
ABSTRACT 1. 서론 2. 관련 이론 2.1 숏피닝 강도 측정 2.2 수소 취화 3. 시험편 및 실험 방법 3.1 시험편 3.2 실험 방법 4. 실험결과 및 고찰 4.1 알멘선도 및 유효 피닝강도 선정 4.2 인장시험결과 4.3 경도 측정 결과 4.4 표면조도 측정결과 4.5 피로시험결과 5. 결론 후기 References
키워드
숏피닝알멘강도수소취화스테인리스강피로수명Shot PeeningAlmen IntensityHydrogen EmbrittlementStainless SteelFatigue Life
저자
박유진 [ Yujin Park | Dept. of Mechanical and Aerospace System, Graduate School, Cheongju University ]
장주혁 [ Juhyeok Jang | Dept. of Mechanical and Aerospace System, Graduate School, Cheongju University ]
김태희 [ Taehee Kim | Dept. of Aeronautical and Mechanical Engineering, Cheongju University ]
김호진 [ Ho-Jin Kim | Dept. of Aeronautical and Mechanical Engineering, Cheongju University ]
김태형 [ Taehyung Kim | Dept. of Aeronautical and Mechanical Engineering, Cheongju University ]
Corresponding Author