Apparent Fracture Toughness of Low-carbon Steel CSN 411353 as Related to Stress Corrosion Cracks

0361566 - ÚTAM 2012 RIV GB eng J - Journal Article
Gajdoš, Lubomír - Šperl, Martin - Siegl, J.
Apparent Fracture Toughness of Low-carbon Steel CSN 411353 as Related to Stress Corrosion Cracks.
Materials & Design. Roč. 32, 8/9 (2011), s. 4348-4353. ISSN 0261-3069
R&D Projects: GA ČR(CZ) GAP105/10/2052; GA ČR(CZ) GPP105/10/P555
Grant - others:GAMPO(CZ) FT-TA5/076
Program: FT
Institutional research plan: CEZ:AV0Z20710524
Keywords : corrosion * fracture * fractography
Subject RIV: JL - Materials Fatigue, Friction Mechanics
Impact factor: 2.200, year: 2011

The occurrence of cracks in structural components indicates a certain threat to their reliable operation, because these cracks can grow during operation and reach critical sizes, leading to fracture. The fracture resistance of a structural component is given by the fracture toughness of the material, determined on standardized specimens with a precycled fatigue crack, and the constraint. The fracture toughness itself depends also on the environment. There is enough evidence that in the conditions of the environment assisted cracking the fracture toughness can be significantly reduced by hydrogen mechanism. Our research results have confirmed this and have demonstrated a considerable reduction in the stress corrosion fracture toughness as compared to that related to fatigue cracks. This should be taken into account when assessing the integrity of structural components with stress corrosion cracks.
Permanent Link: http://hdl.handle.net/11104/0198856