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자료유형
학술저널
저자정보
저널정보
한국해양공학회 한국해양공학회지 한국해양공학회지 제6권 제2호
발행연도
1992.11
수록면
85 - 93 (9page)

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초록· 키워드

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The only hardness of 2nd phase of martensite in dual phase steel which was composed of the martensite and ferrite was changed. Fatigue test was conducted by cantilever type of self-made rotated bending fatigue testing machine. The corrosion fatigue fracture behaviors of dual phase steel were investigated in 3% NaCl solution at N<SUB>f</SUB>=1.5×10<SUP>5</SUP> and N<SUB>f</SUB>=1.0×10<SUP>6</SUP> cycles.
The fatigue strength was increased with increasing the hardness of 2nd phase. The size and number of corrsion pits were influenced by the 2nd phase hardness and pits remain constant in size just after they were transited into cracks. The life of crack initiation was effected by stress level. The shape of relation of ΔK and da/dn has smaller scattering in it in 3% NaCl solution than that in air. The higher the 2nd phase hardness is, the higher the corrosion fatigue life becomes. Corrosion fatigue fracture behavior was effected by mechanics in case of N<SUB>f</SUB>=1.5×10<SUP>5</SUP>cycles and by electric-chemistry in case of N<SUB>f</SUB>=1.0×10<SUP>6</SUP> cycles.

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Abstract
1. 序論
2. 實驗裝置 및 方法
3. 實驗結果 및 考察
4. 結論
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