Influence of corrosive solution temperature on the SCC behavior of the AISI 310 and AISI 316 stainless steels rolled plates

摘要

In this study, the influence of the corrosive solution temperature on the stress corrosion cracking (SCC) behavior of the AISI 310 and AISI 316 stainless steels rolled plates using a constant load method was investigated. For the AISI 316, the relationship between the time to failure and the test temperature fell into a linear function for the temperatures from 143 to 152℃ and an exponential function for the temperatures from 132 to I43℃. These regions arc considered to correspond to a SCC-dominatcd region and a hydrogen cmbrittlcmcnt- dominated region. Microstructural analyses showed that in the SCC-dominatcd region the fracture mode was transgranular, but it was intcrgranular in the hydrogen cmbrittlcmcnt- dominated region. For the AISI 310 steel, the relationship between the time to failure and the test temperature fell into a linear function for the temperatures from 132 to 152℃. The fracture mode was transgranular for all temperatures, which strongly indicated that this steel showed SCC only.