Abstract
This paper analyzes the effect of process history on K-dominance condition in hydrogen assisted cracking. The performed study of stress-strain assisted diffusion reveals that hydrogenation of the fracture process zone is not a purely K-driven local autonomous phenomenon. Hydrogenation and crack growth are shown to be coupled processes, one influencing the other. Consequently, particular histories of stress intensity factor K and crack size evolutions affect crack growth rate ν that can occur at the same instantaneous K-value in a given material. Thus the crack growth kinetics curve ν=ν(K) is not unique as an intrinsic material property must be.
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On leave from: Pidstryhach Institute for Applied Mechanics and Mathematics, Lviv, Ukraine
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Toribio, J., Kharin, V. The Effect of History on Hydrogen Assisted Cracking: 1. Coupling of hydrogenation and crack growth. International Journal of Fracture 88, 233–245 (1997). https://doi.org/10.1023/A:1007442623667
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DOI: https://doi.org/10.1023/A:1007442623667