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1 Zeszyty Naukowe. Mechanika / Politechnika Opolska

1 2007

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Study and computer modeling of damage of passive state during evaporation from water solutions

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Blahetová M. , Lásek S. , Blaheta R.

2007

tom Vol. 321, z. 89

83-84

The stainless steels and related alloys with sufficient resistance to a general corrosion can be susceptible to a localized corrosion in passive state (pitting, cracking, intergranular corrosion) in certain environment under specific conditions. The Drop Evaporation Test (DET) was developed for study of stainless materials resistance to stress corrosion cracking (SCC) at elevated temperatures 100 - 300 °C under constant external load using a chloride containing water solution. In the contribution the initiation and propagation of short cracks as well as pits were observed during the test by the travelling microscope method. The crack initiation and/or propagation can be influenced by the cyclic thermal stresses, when the diluted water solution drops cool down the hot sample. We attend to model stress changes in the testing specimens induced by cooling the heated sample by failing water solution drops. The modeling uses finite element analysis of formulated thermoelasticity problem.