The oxidation behavior of a nickel-based superalloy was investigated from 650 to 1,000 °C for up h in air. Samples with thicknesses ranging 20 500 µm were used document the evolutions microstructure and oxide scale. Oxidation products subsurface evolution metal characterized by XRD EDS analyses. Local breakaway observed after 600 at 800 100 900 due full consumption Cr alloy. Room temperature te...

FSUE «VIAM» has developed a new nickel-based superalloy VZhM200 and its manufacturing technology for casting of turbine blades with directional (pillar-type) structure advanced engines. The advantages the alloy over DS200 Hf are presented in article. quality produced by meets Hf, MAR M200+Hf alloys Cannon-Muskegon Corporation HOWMET Ltd chemical composition, content harmful non-metal impurities...

New grades of ?/?? nickel-based superalloy for the additive manufacturing process are designed using computational approaches. Account is taken need to avoid defect formation via solidification and solid-state cracking. Processing trials carried out powder-based selective laser melting, comparing with heritage alloys IN939 CM247LC. Microstructural characterisation, calorimetry hot tensile testi...

The weldability of GTD-111 nickel-based superalloy by pulsed Nd:YAG laser welding with an average power of 250 W was studied, and the microstructural evolution and cracking characteristics were also investigated. The solidification cracking of the fusion zone (FZ) and the intergranular liquation cracking in the heat affected zone (HAZ) were observed in the joint. Solidification cracking was cau...

In this master thesis, work done in the TURBO POWER project High temperature fatigue crack propagation in nickel-based superalloys during spring 2012 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 crack propagation in the nickel-based superalloy Inconel 718. Experiment...

K416B Ni-based superalloy with high W content has good temperature properties and low cost, which a great development potential. To investigate the room tensile property deformation feature of superalloy, testing at was carried out, optical microscopy (OM), scanning electron (SEM) transmission (TEM) were used to analyze damage mechanisms. Results show that main features nickel-based are disloca...

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...

ABSTRACT Inconel 718 is a difficult-to-cut nickel-based superalloy commonly used in aerospace industry. This paper presents an experimental study of the tool wear propagation and cutting force variations in the end milling of Inconel 718 with coated carbide inserts. The experimental results showed that significant flank wear was the predominant failure mode affecting the tool life. The tool fla...

Recent work in the creep field has indicated that the traditional methodologies involving power law equations are not sufficient to describe wide ranging creep behaviour. More recent approaches such as the Wilshire equations however, have shown promise in a wide range of materials, particularly in extrapolation of short term results to long term predictions. In the aerospace industry however, l...