Cyclic crack growth behaviour of two nickel base turbine disc alloys

1998-05-15
Arslan, G
Doruk, M
The high temperature fatigue crack growth behaviour of the nickel base superalloys Alloy 718 and Rene 95 (specimen thickness = 4.1 mm) were investigated and compared with each other. Fatigue crack propagation (FCP) tests were carried out in laboratory air at room temperature and 600 degrees C by using C-T (compact tension) type specimen that were fatigue precracked at room temperature.
JOURNAL OF MATERIALS SCIENCE

Suggestions

Investigation of radiative heat transfer in freeboard of a 0.3 MWt AFBC test rig
Kozan, M; Selçuk, Nevin (2000-01-01)
Based on the analysis of measured data on flow rates, concentrations and temperatures taken during steady state operation of a lignite-fired 0.3 MWt Atmospheric Fluidized Bed Combustor (AFBC) test rig, radiative exchange in freeboard of the combustor was modeled by using a well-stirred enclosure model in conjunction with Radiosity-Irradiation Method (RIM). Radiative properties of the particle laden combustion gases were calculated by assuming grey radiation behaviour for both particles and gas, and using Le...
Axial shear instability in a "tachion" region
Tsidulko, YA; Marji, E; Bilikmen, S; Mirnov, VV; Cakir, S; Oke, G (1999-01-01)
Plasma axial-shear flow instability arises due to a variation in an equilibrium E x B rotation along the axial direction in which the magnetic field is aligned. The two fluid MHD equations for incompressible perturbation (taking into account the FLR effects) being treated in WKB approximation in transversal direction yield one scalar Klein-Gordon type equation with one-dimensional effective potential U(s) and effective mass on(s). Only axisymmetric, paraxial geometry is analyzed in order to separate the des...
Dynamic modeling of spindle-tool assemblies in machining centers
Ertürk, Alper; Özgüven, Hasan Nevzat; Department of Mechanical Engineering (2006)
Regenerative chatter is a well-known machining problem that results in unstable cutting process, poor surface quality, reduced material removal rate and damage on the machine tool itself. Stability lobe diagrams supply stable depth of cut ا spindle speed combinations and they can be used to avoid chatter. The main requirement for generating the stability lobe diagrams is the system dynamics information at the tool tip in the form of point frequency response function (FRF). In this work, an analytical model ...
Dry sliding wear behaviour of Al-Fe-Si-V alloys at elevated temperatures
Koraman, Emrah; Baydoğan, Murat; Sayilgan, Seda; Kalkanlı, Ali (2015-01-15)
High temperature strength of Al-Fe-V-Si alloys due to quaternary silicide dispersoids in their microstructures has been well documented in the literature. In those works, these materials have been shown as promising candidates to compete with titanium alloys at elevated temperatures. However, there is a lack of information on elevated temperature wear behaviour of those materials, which should be one of the main considerations at elevated temperature use. In order to contribute to this field, dry sliding we...
Analytical and numerical solutions to rotating orthotropic disk problems
Kaya, Yasemin; Eraslan, Ahmet Nedim; Department of Engineering Sciences (2007)
Analytical and numerical models are developed to investigate the effect of orthotropy on the stress distribution in variable thickness solid and annular rotating disks. The plastic treatment is based on Hill’s quadratic yield criterion, total deformation theory, and Swift’s hardening law. The elastic-plastic stress distributions, residual stresses and radial displacement distributions are obtained after having analysed the cases of rotating solid disk, annular disk with rigid inclusion, annular disk subject...
Citation Formats
G. Arslan and M. Doruk, “Cyclic crack growth behaviour of two nickel base turbine disc alloys,” JOURNAL OF MATERIALS SCIENCE, pp. 2653–2658, 1998, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65471.