EFFECT OF RESIDUAL STRESS PROFILE ON HYDROGEN EMBRITTLEMENT SUSCEPTIBILITY OF PRESTRESSING STEEL

V. Kharin  J. Toribio       

Anales de la Mecánica de la Fractura, nº 22 . 2005 . Pág. -
Ver (.pdf): 75

Resumen: The influence of the residual stress and strain distributions caused by surface treatments on the hydrogen embrittlement susceptibility of cold drawn prestressing steel wires, as characterized by means of the time to failure in the FIP test, is analysed. The model to predict the wire life in the hydrogenating aggressive solution is developed. It includes the simulation of hydrogen transport towards prospective rupture sites by diffusion affected by stress and plastic strain, as well as a criterion of critical hydrogen concentration to establish the fracture instant dependent on the stress-strain state. This allows one to analyse the influence of specific characteristics of the residual stress and plastic strain distributions, associated with different surface treatments, on the wire lives.

LocalizaciónAlmagro

Institute of Applied Problems of Mechanics and Applied Mathematics of the National Academy of Sciences of Ukraine, Lviv, Ukraine
Department of Materials Engineering, University of Salamanca