The behavior of meso-carbon microbeads in the boiling quinoline was investigated. The meso-carbon microbeads used were of three kinds; Type C, Type M and Type P. These were treated in quinoline at 238 •Ž for 30 min. and the insoluble part was filtered out. This procedure was repeated five times. The amount of quinoline soluble part was measured and the structural characteristics of quinoline in...

The reduction of maintenance and replacement work costs is an important driving force in the development of high temperature materials (T>800 °C) that can autonomously heal damage as a result of local cracks. In recent years some potential routes involving the addition of sacrificial particles have been identified, yet these systems have the drawback of reduced initial properties and being capa...

Today’s highly competitive environment in the commercial air transportation business instigates airline companies to continue operating their aircrafts beyond the design life, as long as the maintenance ascertaining their safe operation is more cost-effective than the investment into a new aircraft. In the context of damage tolerance of aging aircrafts, the residual strength of the fuselage ski...

The natural initiation and growth of short cracks in Inconel 718 U-notch specimens has been studied at 600C in air. U notches were introduced through broaching, and hardness traces and optical microscopy on cross sections through the U notch broaching showed that the broaching process had introduced a deformed, work hardened layer. Fatigue tests were conducted under load control using a 1-1-1-1...

In the last few years, induction thermography has been established as a non-destructive testing method for localizing surface cracks in metals. The sample to be inspected is heated with a short induced electrical current pulse, and the infrared camera records—during and after the heating pulse—the temperature distribution at the surface. Transforming the temporal temperature development for eac...

The current project, funded by MIOH-UTC for the period 1/1/20094/30/2010, is concerned with the development of the framework for a transportation facility inspection system using advanced image processing techniques. The focus of this study is on the technical details of investigating and utilizing state-of-the-art image analysis techniques to further advance research in image processing based ...

Microtubules (MTs) are cytoplasmic protein polymers that are essential for fundamental cellular processes including the maintenance of cell shape, organelle transport and formation of the mitotic spindle. Microtubule dynamic instability is critical for these processes, but it remains poorly understood, in part because the relationship between the structure of the MT tip and the growth/depolymer...

In polycrystalline metals, local deformation heterogeneities induced by the microstructure influence fatigue crack initiation and micro-crack propagation. The localization in plastic strains associated with heterogeneous deformation has been described as a necessary condition and a precursor for the nucleation of fatigue cracks. However, a clear and quantitative assessment of the correlation be...

Crack detection in pavements and objects has been a constant field of research in pavement management. Conventionally, humans were engaged to detect cracks in the pavements and they used to present report sheets based on their assessment. But, this process was a time consuming one and was costlier too. So, researchers were trying for some alternate method that would detect cracks, hence minimiz...