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| FATIGUE STRIATION AND MACROCRACK PROPAGATION IN Cr12Ni2WMoV STEEL |
| CHEN Chuanyao; DAI Shujuan; GAO Daxing (Huazhong University of Science and Technology; Wuhan) |
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Cite this article:
CHEN Chuanyao; DAI Shujuan; GAO Daxing (Huazhong University of Science and Technology; Wuhan). FATIGUE STRIATION AND MACROCRACK PROPAGATION IN Cr12Ni2WMoV STEEL. Acta Metall Sin, 1986, 22(2): 81-86.
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Abstract TEM microfractography of the fatigue striation formation was further analyzed resulting from investigation of the fatigue crack propagation in Cr12Ni2WMoV steel, and the data for quantitative evaluation of striation interval was developed. The relationship between the rate of fatigue macrocrack propagation, da/dN, and microstriation interval, α, has been discussed. On the assumption to explain the phenomena observed and by interoducing an areacorrecting function: F(△K,R)=A(△K)~m/(1-R)K_c-△K the relation of (dα/dN)vs α may be expressed as dα/dN=F(△K,R)α(△K) The value F for Cr12Ni2WMoV steel is given.
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Received: 18 February 1986
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1 Crooker, T.W. et al., Am. soc. Test. Mater., Spec. Tech. Publ., 600, (1976) , p. 205．
2 Hertzberg, R.W., Deformation and Fracture Mechanics of Engineering Materials, Wiley, New York, 1976, p. 533．
3 陈传尧;高大兴,第二届全国疲劳学术会议论文集(中册);中国力学、航空、机械学会1984,№303．
4 Forman, R.G., et al., Trans. ASME, Ser. D,J. Basic Eng., 89 (1967) , 459．
5 Laird, C., Am. Soc. Test. Mater., Spec. Tech. Publ., 415 (1967) , p. 131 |
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