Corrosion fatigue under the load of low frequency and bigh mean stress has been generally defined as stress corrosion fatigue(SCF).It is a specific failure process due to the inter- action between stress corrosion cracking(SCC) and corrsion fatigue(CF),the effects of which on fracture characteristics,including crack initiation and propagation.service life and cracking mode have not been investigated systematically.The purpose of this pa- per was to study the environment-sensitive fracture behaviour of OCr18Ni9Ti austenitic stainless steel under the load of different fiequencies and high mean stress in boiling MgCl_2 solution.The interaction between SCC and CF would be emphasized.
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