| 제목 |
압축잔류응력을 부여한 스프링강의 부식피로 수명평가 |
| 분야 |
차체 및 구조 안전 |
| 언어 |
Korean |
| 저자 |
박경동(부경대학교), 기우태(부경대학교), 신영진(부경대학교) |
| Key Words |
Compressive residual stress(압축잔류응력), Corrosive condition(부식조건), Corrosion fatigue crack(부식피로균열), Fatigue life(피로수명), The threshold stress intensity factor range(하한계 응력확대계수) |
| 초록 |
In this study, the influence of compressive residual stress and corrosive condition for corrosion fatigue crack was investigated, after immersing in 3.5%NaCl, 10%HNO3+3%HF, 6%FeCl3. The immersion period was performed for 90days. The fatigue characterization of a spring steel with processed shot peening were performed by considering the several corrosion environments in the range of stress ratio of 0.05 by means of opening mode displacement. By using the methods mentioned above, the following conclusions have been drawn: The fatigue life shows more improvement in the shot peened material than that in the un peened material. And the fatigue life shows improvement in ambient than in corrosion conditions. Threshold stress intensity factor range of the shot peened materials has higher than of the un peened materials. And the threshold stress intensity factor range was decreased in corrosion environments over ambient. |
| 원문(PDF) |
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