The corrosion characteristics of passive films on 1060, 2024 and 5083 aluminum alloys formed in citric acid solution are studied Cl – -containing solutions by combining scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) electrochemical impedance (EIS). film 1060 pure Al exhibits the best resistance while presence alloying elements (Cu Mg) reduce alloys. According to firs...

A nonlinear model is proposed in light of the theory isodamage curves, to assess cumulative fatigue damage under multistage loading. The curves were developed through S-N envelope, by Pavlou. adopted functional form a commonly accepted general form. In present work, stress function for life exponent derived with aid curve only. model, no adjusting parameters are necessary estimation. prediction...

Damian O. Elias, Carlos A. Botero, Maydianne C. B. Andrade, Andrew C. Mason, and Michael M. Kasumovic Department of Environmental Science, Policy and Management, University of California, Berkeley, Berkeley, CA 94720, USA, National Evolutionary Synthesis Center, 2024 W. Main St. (Suite A200), Durham, NC 27705, USA, Integrative Behaviour and Neuroscience Group, University of Toronto Scarborough,...

El trabajo que se desarrolla a continuación presenta, manera de descripción, una serie incongruencias en materia políticas sociales con enfoque desarrollo comunitario. Cabe mencionar las señalar no refieren crítica respecto la eficiencia y eficacia implementación política públicas desde el orden Gobierno Federal, sino señalan, mejor los casos, problemas carácter discursivo cuanto al uso algunos...