In this licentiate thesis the work done in the TURBO POWER project Influence of high temperature hold times on the fatigue life of nickel-based superalloys will be presented. The overall objective of this project is to develop and evaluate tools for designing against fatigue in gas turbine applications, with special focus on the nickel-based superalloy Inconel 718. Firstly, the constitutive beh...

BACKGROUND Thyroid malignancies are a heterogeneous group oftumours which show considerable variability in biological behaviour, histological appearances and response to therapy. Thyroid cancer is uncommon and represents only 1% of all malignancies. Objective was to determine the prevalence of malignancy in patients presenting with goitre. This prospective, observational study was conducted at ...

Abstract Most of the researches published on numerical modeling laser welding are looking at similar welding, mainly due to difficulty simulating mixing phenomenon that occurs in dissimilar welding. Furthermore, titanium and nickel alloys has been rarely reported literature. In this study, a 3D finite volume model is proposed simulate fluid flow, heat, mass transfer for Ti-6Al-4V Inconel 718. T...

among the several non-conventional processes, electrical discharge machining (edm) is the most widely and successfully applied for the machining of conductive parts. in this technique, the tool has no mechanical contact with the work piece and also the hardness of work piece has no effect on the machining pace. hence, this technique could be employed to machine hard materials such as super allo...

Thermal issues are critical when machining Ni-based superalloy components designed for high temperature applications. The low thermal conductivity and extreme strain hardening of this family of materials results in elevated temperatures around the cutting area. This elevated temperature could lead to machining-induced damage such as phase changes and residual stresses, resulting in reduced serv...