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P92강의 피로 균열 성장 속도에 미치는 산화와 주파수의 영향
배시연(Siyeon Bae),강형구(Hyounggoo Kang),윤학수(Haksu Yun),이동복(Dongbok Lee),김찬우(Chanwoo Kim),임병수(Byeongsoo Lim) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Fatigue crack growth behavior is affected by various factors. In this study, the influence of oxidation, temperature and frequency on fatigue crack growth rate had been studied for P92 alloy steel. The test of fatigue crack growth rate was carried out at temperature ranging from 550℃ to 700℃ and frequency 20Hz and 0.1Hz using compact tension specimen. As the temperature increased or load frequency decreased, fatigue crack growth rate was increased. Isothermal oxidation test was conducted at 550, 600, 650 and 700℃ for 500 hrs respectively. The oxide scale was increased as the temperature increased. The oxide scale consisted primarily of Fe₂O₃. Finally, an investigation was conducted to find relationship between fatigue crack growth and oxidation at various frequencies and temperatures.