The objective of the present study is to evaluate how the elastic properties of the fabrication material of dental implants influence peri-implant bone load transfer in terms of the magnitude and distribution of stress and deformation. A three-dimensional (3D) finite element analysis was performed; the model used was a section of mandibular bone with a single implant containing a cemented ceram...

The grain refinement behavior of Si-3P, Si-25Mn-10P, and Al-10Si-2Fe-3P master alloys on hypereutectic Al-24Si alloy was studied. Microstructure analysis indicates that the P-containing compounds in three are SiP, MnP, AlP, respectively. coarse flower-like primary silicon transforms into smaller, well-distributed blocks with addition various alloys. When pouring at 840 °C, average size refined ...

an artificial neural network (ann) model is developed for the analysis, simulation, and prediction of the austenite reversion in the thermo-mechanical treatment of 304l austenitic stainless steel. the results of the ann model are in good agreement with the experimental data. the model is used to predict an appropriate annealing condition for austenite reversion through the martensite to austeni...

background and aim: an important criterion for success assessment of implant-supported prostheses is marginal fit. vertical and horizontal discrepancy can result in loosening of the prosthetic screw, crestal bone resorption, peri-implantitis and loss of osseointegration. despite careful attention to waxing, investing, and casting, marginal discrepancies are inevitable. the aim of this study was...

The early development of the Salton Sea geothermal resource proved that carbon steel tubulars do not provide satisfactory service life in the high-temperature, hypersaline brines. A large-scale corrosion test was designed to find the most cost-effective alloys for completing these wells. A series of Ni-Cr-Mo alloys were tested over several years in three production wells and two injection wells...

gears are one of the most critical components in power transmission system of an automobile and also many rotating machinery. many studies have been conducted on optimum gear design. the main objective is to design different aluminium metal matrix composite spur gears before and after optimization. aluminium metal matrix material composites are preferred mostly due to their low density. also th...

-Inelastic neutron scattering has been used to measure the linewidth of the dynamical response of Fe impurities in Mol-,Nb, alloys. The character of the local moment, inferred from its relaxation rate, does not change significantly up to x = 0.15. Between x = 0.15 and x = 0.30 the response decreases rapidly and has disappeared by x = 0.45. The magnetic character of dilute Fe impurities in solid...

BACKGROUND Low blood lead levels previously thought to pose no health risks may have an adverse impact on the cognitive development of children. This concern has given rise to new regulatory restrictions upon lead metal containing products intended for child use. However few reliable experimental testing methods to estimate exposure levels from these materials are available. METHODS The prese...

PURPOSE Due to the current interest in MRI-guided radiotherapy, the magnetic properties of the materials commonly used in radiotherapy are becoming increasingly important. In this paper, measurement results for the magnetization (BH) curves of a range of sintered heavy tungsten alloys used in radiation shielding and collimation are presented. METHODS Sintered heavy tungsten alloys typically c...