Microstructure and properties have been studied for high strength steel weld metals with variations in carbon, manganese and nickel. Based on neural network modelling, experimental welds were made using shielded metal arc welding with manganese at 0.5 or 2.0 wt. % and nickel at 7 or 9 wt. %. Additional welds were made where carbon was varied between 0.03 and 0.11 wt. %. Generally there was very...

This paper presents the results of investigation carried out to improve the mechanical toughness of cement mortar. Toughness is a basic parameter which has to be improved in brick walls, concrete roads, machine foundations, dams etc. Materials fails due to an impact force and vibrations resulting in minor cracks and bonding failure between bricks, it leads to failure of the structure. In order ...

In this research, thermoplastic polyurethane (TPU) and clay nanoparticles were incorporated into poly (butylene terephthalate) (PBT) to improve the impact and tensile properties. The PBT/TPU (90/10, 80/20 and 70/30) samples were prepared by melt mixing using a co-rotating twin-screw extruder followed by injection molding. At the next stage, clay nanoparticles of different weight fractions were ...

objective: there is no definitive data on the strength of glass fiber and cast posts with different length. this in vitro study was designed to investigate and compare the effect of length on the retentive strength of glass fiber and cast posts. materials and methods: sixty recently extracted intact maxillary canine teeth were cut 1mm above the cej. the specimens were endodontically treated and...

The aim of the study was to investigate the flexural and impact strength of 3 commercially available denture base resins after reinforcing them with single walled carbon nanotubes (SWCNT’S). Each acrylic resin was first solubilised in Tetrahydrofuran (THF) and then carbon nanotubes were added in different percentages respectively. A total of 50 specimens were made from each material (Eclipse, T...

Mixed results of attitude as a determinant of information system (IS) adoption suggest that there is more to an attitude's impact than evaluating the IS or its usage as favorable or unfavorable. This paper goes beyond the favorable-unfavorable valence of attitude by introducing the concept of attitude strength, which explains whether an attitude is strong, that is impactful and durable. First, ...

Hydrated lime is a historic material currently used in conservation. It hardens slowly by carbonation slowing construction however, supplementary cementitious materials accelerate hardening enhancing strength. Hydrated-lime mortars with rice husk ash–RHA-; ground granulated blastfurnace slag–GGBSand increasing amounts of two aggregates were studied. Increasing aggregate lowered strength as inte...