Metallurgical and Corrosion Assessment of Submerged Tanker S.S. \u3ci\u3eMontebello\u3c/i\u3e

The Union Oil Tanker S.S. Montebello was torpedoed and sunk six miles (9.7 km) off the coast of Cambria, California by a Japanese submarine on December 23, 1941, two weeks after the attack on Pearl Harbor. With close proximity to the National Monterey Bay Marine Sanctuary, concern about possible crude oil contamination led to the most recent expedition to the site in October 2011. Assessment of the shell plate found that the average corrosion rate was very low and the structure will remain stable for many decades

Metallurgical phase transformations in the case layer of a carburized bearing steel due to rolling contact

The cone (inner race) of a $6{1\over2}$ x 12 inch tapered roller bearing made from case carburized AISI-SAE 4320 steel had the near surface layers analyzed after 0, 2422, 5432, and 13,413 miles of service. Changes in the residual stress, retained austenite, texture, particle size, and dislocation density were determined by x-ray diffraction techniques. The surface hardness and the inside diameter (bore) were also measured during this investigation and the microstructure of the material was studied for selected samples. The research has shown that retained austenite transformed to martensite in the near surface layers due to the rolling contact forces. The volumetric expansion associated with this transformation caused an increase in the residual compressive stresses and a small increase in the bore diameter measurements. The rolling contact forces also caused the particle size of the retained austenite to decrease and the dislocation density to increase due to work hardening of the softer structure. In addition, the surface hardness increased a corresponding amount. Annealing studies on a reconditioned cone found a decrease in the residual compressive stresses and a decrease in the bore diameter with an annealing temperature of 350\sp\circF. Additional work involving regrinding of the rolling surface of a used cone removed some of the residual compressive stresses and caused the bore diameter to increase

Metallurgical and Corrosion Assessment of Submerged Tanker S.S. \u3ci\u3eMontebello\u3c/i\u3e

The Union Oil Tanker S.S. Montebello was torpedoed and sunk six miles (9.7 km) off the coast of Cambria, California by a Japanese submarine on December 23, 1941, two weeks after the attack on Pearl Harbor. With close proximity to the National Monterey Bay Marine Sanctuary, concern about possible crude oil contamination led to the most recent expedition to the site in October 2011. Assessment of the shell plate found that the average corrosion rate was very low and the structure will remain stable for many decades

Breakdown and reconstruction of the career plan in reference to the activity : the case of individuals suffering from chronic disease

L’irruption d’une maladie chronique constitue une rupture dans la vie des individus, qui les conduit à repenser leur projet professionnel. A partir d’un dispositif collectif d’échanges sur le thème du maintien ou du retour au travail, de 35 entretiens semi-directifs de recherche et de 27 entretiens d’orientation, notre étude tend à montrer que le projet des personnes malades s'élabore soit dans la continuité de leur situation de travail antérieure, soit dans un désir de changement. Les activités des sujets, de travail ou hors travail, apparaissent comme un moyen de se dégager de la maladie et d’éprouver ce dont on est capable. Elles sont sources de projection de soi dans l’avenir et permettent, alors même que la référence à celui qu’on était auparavant n’est plus valide, d’étayer le projet sur des expériences concrètes. En cela, elles sont un déclencheur des réorganisations. Le projet est donc un moyen de restauration des capacités d’action sur soi et sur son environnement.Whenever a chronic disease arises, it does mark a break in people’s life, which often leads them to reconsider their vocational project. Through a collective workshop about how to hang on or to return to work and the addition of 35 semi-directive research interviews and 27 counseling interviews, we aim to show that people suffering from a chronic disease build their vocational project, by either carrying on their previous professional life or trying to change it. Both work and off- work activities seem to be a way of escaping the disease and assessing their own capabilities. Through activities, people can picture themselves in the future and build a project based on real experiences, although they are not anymore the person they used to be. Thus, these activities cause reorganizations. The project becomes therefore a way of restoring the ability to act by oneself and on the environment

" Des délivrances au recueil : l'élaboration du "coutumier" des forêts de Normandie au XVe siècle "

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