Kirkendall porosity that forms during interdiffusion in a diffusion couple of nickel-base superalloy CMSX-10 with pure nickel is investigated. The experiments are conducted at temperature 1250 °C, where the strengthening γ′-phase partially dissolved. studied by X-ray sub-μ tomography spatial resolution about 0.353 μm3 European Synchrotron Radiation Facility (ESRF) Grenoble, France. It found dep...

Abstract: activity gas diffusion process has been investigated in this research. Effects of coating temperature and aluminumconcentration in powder mixture on formation mechanism were studied using optical and scanning electronmicroscopes, EDS and X-ray diffraction (XRD) techniques. For this purpose two different packs containing 1 and 2wt% aluminum powder, were used for coating the samples at ...

A COUPLED CREEP-PLASTICITY MODEL FOR RESIDUAL STRESS RELAXATION OF A SHOT-PEENED NICKEL-BASE SUPERALLOY Name: Dennis Justin Buchanan University of Dayton, 2007 Advisor: Dr. R. A. Brockman Shot peening has been employed in numerous industries for decades to impart beneficial compressive residual stresses on the surface of metal components. Compressive residual stresses retard initiation of surfa...

Abstract The influence of hold time on the crack growth behaviour a single crystal nickel base superalloy under in-phase thermomechanical fatigue is investigated. Two da/dt models were calibrated using creep tests in temperature range 750–950 °C: one based K and other (Ct)avg. applied, combination with cycle dependent model, to predict da/dN 1–6 h time. predictions inaccurate generally non-cons...