PSI - Issue 59

Jesús Toribio et al. / Procedia Structural Integrity 59 (2024) 31–35 Jesús Toribio / Procedia Structural Integrity 00 (2024) 000 – 000

35 5

where K c is the critical stress intensity factor (at the end of the hydrogen assisted cracking process), G = E/2/(1+  ), E and  being the elastic constants, and  (  ) is a dimensionless function of the angular coordinate   given by:

sin(  /2) tg 

 (  ) =

[2 – 2  – cos 2 ( 

(14)





on the basis of the singular elastic solution in the vicinity of a crack tip under plane strain conditions. 7. Conclusions A simple method was proposed to estimate the local strain rate at a crack tip, on the basis of approximate stress distributions in its vicinity. The procedure is fully analytical, and thus presents clear advantages of simplicity over traditional numerical methods. References Andresen, P.L., Ford, F.P., 1988. Life prediction by mechanistic modeling and system monitoring of environmental cracking of iron and nickel alloys in aqueous systems. Materials Science and Engineering A103, 167-184. Congleton, J., Shoji, T., Parkins, R.N., 1985. The stress corrosion cracking of reactor pressure vessel steel in high temperature water. Corrosion Science 25, 633-650. Ford, F.P., Silverman, M., 1980. Effect of loading rate on environmentally controlled cracking of sensitized 304 stainless steel in high purity water. Corrosion 36, 597-603. Hartranft, R.J., Sih, G.C., 1977, Stress singularity for a crack with an arbitrarily curved front. Engineering Fracture Mechanics 9, 705-718. Herbsleb, G., Schwenk, W., 1985. The influence of dynamic mechanical parameters on stress corrosion cracking of steel - a review. Corrosion 41, 431-437. Hinton, B.R.W., Procter, R.P.M., 1983. The effect of strain-rate and cathodic potential on the tensile ductility of X-65 pipeline steel. Corrosion Science 23, 101-123. Lidbury, D.P.G., 1983. The estimation of crack tip strain rate parameters characterizing environment assisted crack growth data. Embrittlement by the Localized Crack Environment (R.P. Gangloff, Ed.,) AIME, New York, pp. 149-172. Maiya, P.S., 1987. Prediction of environmental and strain-rate effects on the stress corrosion cracking of austenitic stainless steels. Journal of Pressure Vessel Technology 109, 116-123. Maiya, P.S., Shack, W.J., 1985. Stress corrosion cracking susceptibility of AISI 316 NG and 316 stainless steel in an impurity environment. Corrosion 41, 630-634. Mayville, R.A., Warren, T.J., Hilton, P.D., 1987. The influence of displacement rate on environmentally assisted cracking of precracked ductile steel specimens. Journal of Engineering Materials and Technology 109, 188-193. Mayville, R.A., Warren, T.J., Hilton, P.D., 1989. Determination of the loading rate needed to obtain environmentally assisted cracking in rising load tests. Journal of Testing and Evaluation 17, 203-211. Parkins, R.N., 1987. Factors influencing stress corrosion crack growth kinetics. Corrosion 43, 130-139. Parkins, R.N., 1989. The application of stress corrosion crack growth kinetics to predicting lifetimes of structures. Corrosion Science 29, 1019-1038. Parkins, R.N., 1990. Strain rate effects in stress corrosion cracking. Corrosion 46, 178-189. Patel, P.S., Jarman, R.A., 1985. Strain distribution around a stress corrosion crack tip. British Corrosion Journal 20, 23-27. Rice, J.R., Sorensen, E.P., 1978. Continuing crack-tip deformation and fracture for plane-strain crack growth in elastic-plastic solids. Journal of the Mechanics and Physics of Solids 26, 163-186. Rieck, R.M., Atrens, A., Smith, I.O., 1989. The role of crack tip strain rate in the stress corrosion cracking of high strength steels in water. Metallurgical Transactions 20A, 889-895. Scully, J.C., 1980. The interaction of strain-rate and repassivation rate in stress corrosion crack propagation. Corrosion Science 20, 997-1016 Scully, J.R., Moran, P.J., 1988. Influence of strain on the environmental hydrogen-assisted cracking of a high-strength steel in sodium chloride solution. Corrosion 44, 176-185. Toribio, J., 1997a. Local strain rate at crack tip: implications in stress corrosion cracking. British Corrosion Journal 32, 41-47. Toribio, J., 1997b. The role of crack tip strain rate in hydrogen assisted cracking. Corrosion Science 39, 1687-1697. Toribio, J., 1998. Material factors influencing notch tip strain rate. British Corrosion Journal 33, 23-28. Toribio, J., Elices, M., 1992. The role of local strain rate in the hydrogen embrittlement of round-notched samples. Corrosion Science 33, 1387-1409.