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| INVESTIGATION OF FATIGUE CRACK GROWTH RATE FOR STEEL 16Mn |
| Tong Zhishen; Hou Yaoyong; Li Mingqi; Jiang Shengrui (Lanzhou University) |
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Cite this article:
Tong Zhishen; Hou Yaoyong; Li Mingqi; Jiang Shengrui (Lanzhou University). INVESTIGATION OF FATIGUE CRACK GROWTH RATE FOR STEEL 16Mn. Acta Metall Sin, 1982, 18(5): 618-626.
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Abstract Based on both the calculating formula for J-integral determined by means of TPB type specimen and the experimental evidence of da/dN=C_1(ΔJ)~r ,an expression of subcritical fatigue crack growth rate characterized by AJ from TPB specimen from the linear elastic to complete yielding region has been derived as follows: For high-cycle fatigue crack, its approximate growth rate will be which seems to be identical with the Paris' relation. For high-stain fatigue crack, it may be which is analogous to the Coffin-Manson's relation.These formulae are confirmed by the experimental results for steel 16Mn specimens in the environment of atmosphere or aqueous H_2S saturated solution. It is also indicated that the aqueous H_2S saturated solution may aggravate the subcritical growth rate of fatigue cracking.
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Received: 18 May 1982
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1 Coffin, L. F., Jr., Am. Soc. Test. Mater., Spec. Tech. Publ., № 520,(1973) , p. 5．
2 蔡其巩,金属学报,12(1976) ,45．
3 Dowling, N. E., Am. Soc. Test. Mater, Spec. Tech. Publ., № 601,(1976) , p. 19．
4 申辉旺;邓其源;蔡其巩,未发表资料,1974．
5 陈篪;姚蘅;邓枝生;庄韬;邓其源,金属学报,11(1978) ,174．
6 Mowbray, D. F., Am. Soc. Test. Mater., Spec. Tech. Publ., № 601,(1976) , p. 33．
7 兰州化工机械研究所,未发表资料,1976． |
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