Zheng Caiyun

TL;DR: In this paper, the phase compositions and microstructure of carbon nanotube (CNT) reinforced hydroxyapatite composite coatings have been studied using X-ray diffraction, scanning electron microscopy, transmission electron microscope (TEM), and high-resolution HRTEM, which showed that a large amount of CNTs can be found with their original tubular morphology in the composite coating, even though some of them react with titanium element in the substrate during laser irradiation.

TL;DR: In this paper, a three-dimensional heat and mass transfer model is used to simulate the welding process, based on the solution of the equations of mass, momentum, energy conservation and solute transport in weld pool.

TL;DR: In this paper, the authors used optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive spectrometer (EDS) to characterize the welded seam of a nickel-based superalloy K418.

TL;DR: In this article, a 3D numerical model was developed to study the powder stream structure of a coaxial feeding nozzle, which was used to explore the collision behavior of particles in the coaxial nozzle, as well as powder concentration distribution.

TL;DR: In this paper, laser welding cast Ni-based superalloy K418 turbo disk and alloy steel 42CrMo shaft were evaluated by microhardness and tensile strength testing, and the results showed that the welded seam was relatively uniform and lower than that of the base metal due to partial dissolution and suppression of the strengthening phase gamma' to some extent.