In this paper, the behaviours of corrosion fatigue crack growth for GC-4、300M and 30CrMnSiNi2 Ahigh strength steels were studied.The effects of different environments,heat treatments,stress rates andfrequencies were considered.The results show that there is a significant effect of corrosion environmentsand heat treatments on the fatigue crack growth.In corrosion environment,with frequency decreases,thecrack propagation rate increases evidently,with the stress rate increasing,the influence of environment isenhanced greatly.The morphologies of specimen fractures were analysed by SEM,and corrosion fatiguemechanism of high strength steels was discussed.
Key words
high strength steel /
corrosion fatigue /
fatigue crack growth /
microstructure
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References
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Footnotes
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