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

• Autorzy: Blahetová, M. , Lásek, S. , Blaheta, R.
• Konferencja: Metody oceny struktury oraz własności materiałów i wyrobów/sympozjum (XXII ; 6-8.XI.2007 ; Svratka, Czechy)
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

computer modelling; water solutions; stainless steel; evaporation

• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2007
• Tom: Vol. 321, z. 89
• Strony: 83-84
• Opis fizyczny: Bibliogr. 6 poz., il., tab., wykr.

Twórcy

autor

Blahetová, M.

autor

Lásek, S.

autor

Blaheta, R.

• VŠB- Technical university of Ostrava, FMMI

Bibliografia

• [1] ARNVIG, P. E. - WASIELEWSKA, W. Stress Corrosion Behaviour of Highly Alloyed Stainless Steels under Severe Evaporative Condition. Acom - Avesta Sheffield corrosion management, 1993, No. 3, p.1 – 7.
• [2] ISO 15324 (2000) Corrosion of metals and alloys - Evaluation of stress corrosion cracking by the drop evaporation test, 10 p.
• [3] LASEK, S., CÍHAL, V., BLAHETOVÁ, M.: Stress corrosion cracking study of austenitic stainless steels by the drop evaporation test, Sb. konf.14-th ECF, 8.-13.9.2002, Krakow, CD.
• [4] CÍHAL, V., LASEK, S., BLAHETOVÁ, M.: Drop Evaporation Test for stress corrosion cracking study, The Europ. Cor. Congress EUROCORR 2003, 28.9.- 2.10.2003 Budapest, 9 s. CD ROM.
• [5] R. D. COOK: Finite Element modelling for Stress Analysis, John Wiley&Sons, INC., 1995.
• [6] M. BLAHETOVÁ, V. CÍHAL, S. LASEK: Study of stress corrosion cracking initiation of high alloy materials, Pros.of Conf. EUROCORR 2004, 12.-16.9.2004, Nice, France, CD-ROM, 6 s., EFC event No. 266.