Influence of corrosion environments on materials and strength of structures:new approaches and practical applications.

• Autorzy: Dmytrakh I.
• Konferencja: X Polsko-Ukraińsko-Niemiecka Letnia Szkoła Mechaniki Pękania. Trzebieszowice, 10-14 czerwca 2007
• Języki publikacji: EN

Abstrakty

EN

The presented lecture highlights the mechanical, physical and corrosion aspects of the environmentally assisted fracture of structural metallic materials. The methods and testing equipment for corrosion crack growth studies and electrochemical measurements within cracks are described. The relationship between electrochemical state and stress-strain state of pre-fracture zone was derived on the base of received experimental data for the number systems "material-environment". The new method for determining of corrosion fatigue crack growth rate diagrams is presented with taken into account an electrochemical situation in the crack tip. It has been proven that such diagrams reflect the extreme influence of the environment factor on material corrosion fatigue fracture processes and may be recommended as the base for a remaining lifetime calculation of the structure elements that are exploited under environmental conditions. The engineering applications of presented approaches and methods for expert assessment of technical state of heat-and-power engineering pipelines are considered and the examples of calculations of residual life of some structural elements are given with taken into account of the actual data of metal properties and operating conditions of equipment.

Słowa kluczowe

EN

structural metals; corrosive environments; crack-like defects; stess corrosion cracking; corrosion fatigue; electrochemical conditions in crack; stress intensity factor; crack growth rate; admissible crack size; threshold and critical crack depth; diagram of fracture risk assessment

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Materiałoznawstwa i Mechaniki Technicznej Politechniki Wrocławskiej. Konferencje
• Rocznik: 2007
• Tom: Vol. 65, nr 11
• Strony: 13--35
• Opis fizyczny: Bibliogr. 26 poz.

Twórcy

autor

Dmytrakh I.

• Karpenko Physico-Mechanical Institute of National Academy of Sciences of Ukraine 5 Naukova Str Lviv. 79601, Ukraine.

Bibliografia

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