316 스테인레스강의 열충격 특성
Thermal Shock Properties of 316 Stainless Steel
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The present work dealt with the high temperature thermal shock properties of 316 stainless steels, in conjunction with a detailed analysis of their microstructures. In particular, the effects of the thermal shock temperature difference and thermal shock cycle number on the properties of 316 stainless steels were investigated. A thermal shock test for 316 stainless steel was carried out at thermal shock temperature differences from 300℃ to 1000℃. The cyclic thermal shock test for the 316 stainless steel was performed at a thermal shock temperature difference of 700℃ up to 100 cycles. The characterization of 316 stainless steels was evaluated using an optical microscope and a three‐point bending test. Both the microstructure and flexural strength of 316 stainless steels were affected by the high‐temperature thermal shock. The flexural strength of 316 stainless steels gradually increased with an increase in the thermal shock temperature difference, accompanied by a growth in the grain size of the microstructure. However, a thermal shock temperature difference of 800℃ produced a decrease in the flexural strength of the 316 stainless steel because of damage to the material surface. The properties of 316 stainless steels greatly depended on the thermal shock cycle number. In other words, the flexural strength of 316 stainless steels decreased with an increase in the thermal shock cycle number, accompanied by a linear growth in the grain size of the microstructure. In particular, the 316 stainless steel had a flexural strength of about 500 MPa at 100 thermal‐shock cycles, which corresponded to about 80% of the strength of the as‐received materials.
Abstract
The present work dealt with the high temperature thermal shock properties of 316 stainless steels, in conjunction with a detailed analysis of their microstructures. In particular, the effects of the thermal shock temperature difference and thermal shock cycle number on the properties of 316 stainless steels were investigated. A thermal shock test for 316 stainless steel was carried out at thermal shock temperature differences from 300℃ to 1000℃. The cyclic thermal shock test for the 316 stainless steel was performed at a thermal shock temperature difference of 700℃ up to 100 cycles. The characterization of 316 stainless steels was evaluated using an optical microscope and a three‐point bending test. Both the microstructure and flexural strength of 316 stainless steels were affected by the high‐temperature thermal shock. The flexural strength of 316 stainless steels gradually increased with an increase in the thermal shock temperature difference, accompanied by a growth in the grain size of the microstructure. However, a thermal shock temperature difference of 800℃ produced a decrease in the flexural strength of the 316 stainless steel because of damage to the material surface. The properties of 316 stainless steels greatly depended on the thermal shock cycle number. In other words, the flexural strength of 316 stainless steels decreased with an increase in the thermal shock cycle number, accompanied by a linear growth in the grain size of the microstructure. In particular, the 316 stainless steel had a flexural strength of about 500 MPa at 100 thermal‐shock cycles, which corresponded to about 80% of the strength of the as‐received materials.
참고문헌 (14)
- Arjomandi, K., "Stability and Post-buckling Response of Sandwich Pipes under Hydrostatic External Pressure", International Journal of Pressure Vessels and Piping, 88(4), pp.138~148 (2011)
- Au, M., "High Temperature Electrochemical Charging of Hydrogen and Its Application in Hydrogen embrittlement research", Materials Science and Engineering A, 454-455, pp.564~569 (2007)
- Brass, A. M., "Hydrogen Uptake in 316L Stainless Steel : Consequences on the Tensile Properties", Corrosion Science, 48, pp.3222~3242 (2006)
- Eschbach, L., "Effect of Recrystallization and Grain Size on the Mechanical Properties of Spray Formed AlCuMgAg-alloys", Materials Science and Engineering A, 248, pp.1~8 (1998)
- Hur, K. D., "Stability of Elastically Restrained Valve-Pipe System with Crack", International Journal of Modern Physics : Conference Series, 6, pp.373~378 (2012)
- Jang, C., "The Effects of the Stainless Steel Cladding in Pressurized Thermal Shock Evaluation", Nuclear Engineering and Design, 226(2), pp.127~140 (2003)
- Kadlec, M., "Thermal Fatigue Crack Growth in Stainless Steel", International Journal of Pressure Vessels and Piping, 98, pp.89~94 (2012)
- Kendoush, A. A., "Thermohydraulic Effects of Safety Relief Valves", Experimental Thermal and Fluid Science, 19(3), pp.131~139 (1999)
- 강문필, "초음파를이용한 금속기지 복합재료의 열충격 손상 평가", 대한기계학회논문집 A, 29(11), pp.1480~1487 (2005), 대한기계학회
- Kim, T. S., "Mechanical Properties and Characteristics According to Stainless Steel Microctructure", Journal of Korean Society of Steel Construction, 24, pp.36~40 (2012)
- 이상필, "SiC 재료의 미세조직 및 열충격 특성", 한국해양공학회지, 25(3), pp.28~33 (2011), 한국해양공학회
- Liu, T. J., "Power-Operated Relief Valve Stuck-Open Accident and Recovery Scenarios in the Institute of Nuclear Energy Research Integral System Test Facility", Nuclear Engineering and Design, 186(1-2), pp.149~176 (1998)
- Sugiyama, S., "The Effect of Electrical Hydrogen Charging on the Strength of 316 Stainless Steel", Journal of Nuclear Materials, 283-287, pp.863~867 (2000)
- Zhao, M. C., "Relationship between Yield Strength and Grain Size for a Bimodal Structural uUtrafine-Grained Ferrite", Cementite Steel, 2007, pp.57, 857~860