Abstract The competition between epitaxial vs. equiaxed solidification has been investigated in CMSX-4 single crystal superalloy during laser melting as practiced additive manufacturing. Single-track scans were performed on a powder-free surface of directionally solidified alloy with several combinations power and scanning velocity. Electron backscattered diffraction (EBSD) mapping facilitated ...

In the pursuit of more efficient gas turbine engines, components are required to operate for longer times at elevated temperatures. This increased time in service, together with a complex loading regime, can expose material environmental attack. work has demonstrated that interaction stress, NaCl and sulphur-containing environment is critical cause crack initiation early stages exposure acceler...

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...