金属学报  1981, Vol. 17 Issue (1): 10-119

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钢中氢致裂纹机构研究

褚武扬;肖纪美;李世琼

北京钢铁学院;北京钢铁学院;北京钢铁学院

MECHANISM OF HYDROGEN INDUCED CRACKING IN STEELS

Chu Wuyang; Xiao Jimei and Li Shiqiong (Beijing University of Iron and Steel Technology)

褚武扬;肖纪美;李世琼. 钢中氢致裂纹机构研究[J]. 金属学报, 1981, 17(1): 10-119.
, , . MECHANISM OF HYDROGEN INDUCED CRACKING IN STEELS[J]. Acta Metall Sin, 1981, 17(1): 10-119.

摘要 参考文献 相关文章 Metrics 全文: PDF(5111 KB)   摘要: 用抛光的恒位移试样对不同强度(σ_b=900—1800MPa)的四种低合金钢在各种致氢环境(电解充氢、氢气、H_2S气体、水介质、H_2S水溶液、缓蚀剂水溶液、丙酮、酒精等有机溶液)下跟踪观察了氢致裂纹的产生和扩展过程.与此同时也测量了在这些致氢环境中的K_(ISCC)(或K_(IH))和da/dt,并研究了它们随强度变化的规律。 结果表明,当加载裂纹前端的K_I>K_(ISCC)(K_(IH))后,在上面所说的任何一种致氢环境都能产生氢致滞后塑性变形,并由此导致裂纹的产生和扩展。即随着氢的扩散进入,原裂纹前端塑性区及其变形量逐渐增大。对超高强度钢,在滞后塑性区端点形成不连续的氢致裂纹,它们随滞后塑性变形的发展逐渐长大以致互相连接。当强度降低时,氢致裂纹沿滞后塑性区边界连续地向前扩展。这就表明,在Ⅰ型裂纹条件下,氢致滞后塑性是产生氢致滞后裂纹的必要和充分条件。 在所有的致氢环境中,止裂的K_(ISCC)(K_(IH))均随钢的强度下降而升高,da/dt均随钢的强度下降而降低。强度相同时,水中加缓蚀剂和阳极极化使K_(ISCC)升高,da/dt下降,与此相反,阴极极化使K_(ISCC)下降,da/dt升高。而在饱和H_2S溶液以及加载下电解充氢时K_(ISCC)(K_(IH))最低,da/dt最高。 实验也表明,在电解充氢条件下还能以另一种机构 Abstract：The nucleation aria propagation of hydrogen induced cracking in various environments capable of supplying hydrogen such as H_2 gas, H_2S gas, distilled water, H_2S solution, 0.1N K_2Cr_2O_7 solution, acetone, alcohol and hydrogen introduced by charging have been traced by metallographic shadowing technique in four low-alloy steels with a wide range of tensile strength (900 to 1800 MPa). The variation of K_(ISCC)(Or K_(ⅠH)) with strength of the steels in these environments has also been investigated. It is shown that if K_Ⅰ of the crack tip exceeds K_(ISCC) (or K_(IH)), a hydrogen induced delayed plasticity will occur in all the environments experimented, followed by a nucleation and propagation of hydrogen induced cracking, i.e., with the entry of the hydrogen atoms, the size of the plastic zone and the plastic deformation in front of the crack tip are enlarged continuously with time. In ultrahigh strength steels, the hydrogen induced cracking is nucleated at the tip of the closure of the two paths of delayed plastic zones. These discontinuous cracks will grow and join one another with the progress of the delayed plasticity. In lower strength steels, the initial pre-crack propagates continuously along the path near to the border of the delayed plastic-elastic region with the enlargement of hydrogen induced delayed plastic zone. Thus, it is concluded that hydrogen induced delayed plasticity might be necessary and sufficient condition for hydrogen induced delayed cracking for Mode Ⅰ crack.In all the environments used, the K_(ISCC) (or K_(IH))is increased, and the da/dt decreased with the decrease of the strength of the steel. With identical strength level, anodic polarization in water or addition of the inhibitor (0.1N K_2Cr_2O_7) may bring about an increase in K_(ISCC) and a fall in da/dt, however, cathodic polarization in water affects inversely. Lower K_(ISCC) and higher da/dt are obtained for stress corrosion in saturated aqueous solution of H_2S or electrolytic charging during loading. It was also observed that another mechanism of hydrogen induced cracking, i.e. hydrogen pressure mechanism is operative during severe electrolytical charging without external stress. 收稿日期: 1981-01-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 褚武扬 肖纪美 李世琼 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1981/V17/I1/10 [1] Weiner, L. C., Corrosion, 17 (1961) , 109． [2] Louthan, M. R., Hydrogen in Metals, Proceedings of the Conference, 1973． ed. by A. W. Thompson & I.M.Bernstein. ASM, Metals, Park, Ohio, 1974, p. 53． [3] Petch, N. J., Phil. Mag., 1 (1956) , 331． [4] Troiano, A. R., Trans. ASM, 52 (1960) , 54． [5] Oriani, R. A. and Josephic, P. H., Acta Met., 22(1974) , 1065． [6] Beachem, C. D., Met. Trans., 3 (1972) , 437． [7] Chu,W.Y.(褚武扬),Hsiao,C.M.(肖纪美)and Li,S.Q.(李世琼),Scri.Met.,13(1979) .1063． [8] 褚武扬、李世琼、肖纪美、王枨,金属学报,16(1980) ,179． [9] Chu,W.Y.(褚武扬),Hsiao,C.M.(肖纪美)and Li.S.Q.(李世琼),Scri.Met.,13(1979) ,1057． [10] Chu,W.Y.(褚武扬),Lj.S.Q.(李世琼),Hsiao,C.M.(肖纪美)and Tien,J.Z,(田中卓),Corrosion,36(1980) ,475． [11] 褚武扬、肖纪美、李世琼,北京钢铁学院学报,2(1979) ,126． [12] #12 [13] Smith, J. A., Peterson, M. H. and Brown, B. F., Corrosion, 26 (1970) , 539． [14] Frohmbery, R. P., Barnett, W. I. and Troiano, A. R., Trans. ASM, 47 (1955) , 892． [15] 井上明久,细谷佳弘,增本健,铁钢,65(1979) ,525． [16] Chu, W.Y. (褚武扬), Hsiao, C. M. (肖纪美) and Li, S.Q. (李世琼), "Mechanism of SCC and Hydrogen-induced Delayed Cracking", ICFS Proceedings of 5th International Conference on Fracture.N No related articles found! Viewed Full text Abstract Cited   Shared      Discussed