[PDF] Top 20 Mat. Res. vol.8 número4

... The financial support from Departamento de Engenharia de Materiais, Universidade Federal de São Carlos - DEMa/UFSCar for mailing expenses; from Laboratório de Materiais Vítreos [r] ... See full document

... It is important to emphasize that the Ti-13Nb-13Zr alloy presents lower initial elastic modulus and higher ultimate tensile strength, when compared with the other studied alloys.. Alt[r] ... See full document

... The main objectives of the present study are to understand and quantify the effect of the grain size of the substrate on the oxidation behaviour of pure iron and a low-alloy ferritic s[r] ... See full document

... graphite is removed all at once, leaving empty nest - Figure 7. Zone III, the pit, is the place of material storage, both wear debris and external impurities coming from the environment - Figure 8. Special storage ... See full document

... Inluence of martensite formation and grain size on room temperature low cycle fatigue behav- ior of AISI 304LN austenitic stainless steel. behavior of 316L auste- nitic stainless s[r] ... See full document

... the quenching medium in a closed circuit using a hydraulic pump which then passes through a generator where the kinetic energy of the fluid is transformed into vibrational energy in the cooling zone. The influence of ... See full document

... As shown in Figure 3b when the bulk phosphorous content exceeded 0.017 weight percent, endurance limit dropped significantly, e.g. an increase in phosphorous from 0.017 to 0.031 weight percent reduced endurance limits ... See full document

... One important feature of the Brazilian Tecnored ironmaking process is its lexibility to use different types of solid fuels, other than metallurgical coke, as proved in the pilot plant t[r] ... See full document

... Titanium alloys parts are ideally suited for advanced aerospace systems because of their unique combination of high speciic strength at both room temperature and moderately elevated tem[r] ... See full document

... nonreactivity (nontoxic, nonalergic and fully biocompatible) with the body and tissues has driven its wide use in body implants, prosthet- ics devices and jewelry, and in food processing. Stemming from the unique ... See full document

... ing length to diameter ratio L/D and assumed values of hyperboloid proile coeficient, are given in Figure 7; there is a small decrease in static equilibrium position angles α eq with an increase in hyperboloid proile ... See full document

... Values predicted by the mean square displacement are slightly higher than those obtained from the jump frequency, and non basal jumps have higher vacancy migration frequency than the basal ones. Taking ν in (8) as ... See full document

... From the magnetic characterization and the computational simulations, using the finite element method (FEM), it has been verified that, at the typical current transforme[r] ... See full document

... the microstructure of varistors exhibit considerable variation from one manufacturer to another, they all exhibit the characteristics of a typical ceramic prepared by liquid-phase sint[r] ... See full document

... focused upon the oil and gas industries. Arising from exchange visits and workshops in both the UK and Brazil, enabled by this network, three principal inter-related themes for research have been identi- ied, which ... See full document

... partial melting step was expected to improve the microstructure of the Bi-2223 blocks, by forming a liquid phase that could reduce porosity and heal cracks.. However, in the present st[r] ... See full document

... From the thermodynamic point of view, a rather low concentra- tion of Cr is sufficient in order to form a Cr 2 O 3 scale on Fe-Cr steel. However, the critical minimum concentration is m[r] ... See full document

... Based on these ideas, a broad programme of tests is under devel- opment involving other levels of stress and temperatures in the range from 500-700 °C, with rupture times going up to ab[r] ... See full document

... Figure 8, the crack deviates from its path because it encounters a pos- sible metallurgical defect such as an inclusion, like an oxide, which arrests its propagation, forcing the crack to follow another ... See full document

... In the Q&P process, high carbon supersaturation of the martensite prior to partitioning could conceivably drive transition carbide formation to a greater extent than would[r] ... See full document