| 제목 |
장시간 시효처리가 316 스테인리스 강의 고온 기계적 성질에 미치는 영향 |
| 분야 |
재료 및 RECYCLE |
| 언어 |
Korean |
| 저자 |
임병수(성균관대학교), 임지우(성균관대학교), 정찬서(성균관대학교) |
| Key Words |
Long term thermal aging(장시간 시효처리), Precipitation(석출물), Tensile property(인장특성), High temperature fatigue crack growth(고온 피로 균열 성장), ΔK_th (하한계 응력 확대계수 범위), STS316(스테인리스 316) |
| 초록 |
At elevated temperature, very complex precipitations occur in STS316. To investigate the effect of the precipitation on mechanical properties in STS316, tensile tests and fatigue crack growth tests were carried out at 650℃ using artificially degraded materials. The material degradation was simulated by aging for up to 20000 hrs. at 750℃, which is equal to 179000hrs (about 20yrs) of service life at 650℃, after conducting solution treatment for 20 min. at 1130℃. The result of the hardness test and the tensile test showed that both properties are closely related to the mean free distance of carbides. Also, from the results of fracture tests at 650℃, ΔK_th values were found to decrease as aging time and microstructure, as the volume fraction of σ phase increased.{{br}} |
| 원문(PDF) |
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