Modelling the stress corrosion cracking of low alloy steels

Some effects of yield strength on the stress corrosion cracking behaviour of low alloy steels in aqueous environments at ambient temperatures

“…The importance of this is observation is obvious and will be dealt with in the consideration of the next SCC model. This particular has recently been proposed by Gutierrez-Solana et al [19] who established that SCC occurred through a series of isolated and unstable local fracture events within the plastic zone which are controlled by local embrittlement due to absorbed hydrogen.…”

“…A comparison of the yield strength and K 1SCC trends for low alloy steels reported in the literature and the predictions from the Nair and Tien model [22]. path from IGF to TGF which has been shown to occur within a very short tempering range [19]. It seems reasonable to assume that cracking will be transgranular if cracks nucleate inside a grain boundary region and intergranular in nature if nucleated at a grain boundary, see Fig.…”

“…The model also explained how the environmental conditions can affect the IGF-TGF transition. Indeed recent work [19] has experimentally demonstrated both grain size and environmental effects on the IGF-TGF transition point.…”

“…About a decade ago Gutierrez-Solana et al [19] proposed a model which stated that SCC occurred as a result of a series of isolated and unstable local fracture events within the crack tip plastic zone which were controlled by local embrittlement due to absorbed hydrogen.…”

“…1 [11][12][13][14][15][16][17][18][19][20][21][22]. From this figure it can be seen that there is a strong influence of material strength on the susceptability to SCC inasmuch that the K 1SCC value is markedly reduced as the yield strength increases.…”