Materials Science Forum Vol. 834

Abstract: Article is dedicated to development of the scientific and technological principles allowing by means of innovative beam and plasma technologies to receive a new class of heterogeneous nanocomposite coatings having the increased cyclic crack resistance and hardness on the conductive and dielectric complex-shaped products. On the basis of the received results the source of metal atoms and beams of high-energy molecules with a rectangular target was developed and new installation for coating deposition is made.

Abstract: Selective electron beam melting has been considered as the most advanced method of additive manufacturing of workpieces made of titanium and titanium-based alloys for the aircraft industry. The impact of basic technological parameters on the thickness of thin walls obtained with the use of selective electron beam melting has considered. Metallographic examination of the experimental samples has been performed.

Abstract: The possibility of creation on a surface of high speed steel and a carbide material of near-surface layers modified with refractory combinations which are formed by means of initiating the reaction of self-extending high-temperature synthesis while microalloying with the use of pulse electronic-beam is shown.

Abstract: The article touches upon the technical problems and perspectives of implementing the Selective Laser Melting method for producing structural components for aircraft. The possibilities of additive manufacturing technology processes and their advantages in comparison with traditional methods of part formation are shown. Issues of standardization in the field of additive manufacturing, as well as terms and definitions adopted at the present time, are considered. Based on the analysis of literary sources, the necessity of developing selective laser melting methods for the specific steels and alloys used in aircraft production is shown.

Abstract: The system approach to study the causes of operational characteristics disturbance for ceramic tool materials based on complex research and its systematization. In the present study the defects by volume and by surface are researched. The main directions of operational characteristics improvement for tool materials are showed.

Abstract: This paper investigates and analyses use of numerical modeling by finite element method (FEM) at studying of consolidation processes of materials from powder by spark plasma sintering (SPS). Tasks of SPS process optimization is discussed in detail. Examples of numeric analysis of SPS of current conducting and non-conducting materials are given. Numeric modeling of sample sintering with hybrid method when SPS process is combined with hot pressing (HP) process is studied. Also paper presents development prospects of principles of SPS process numeric modeling.

Abstract: The article presents a study of selective laser melting process (SLM) namely a study of stable track formation by the example of Co-Cr alloy. The characterization of the main process factors, which have an influence on the parts’ functionality, is developed. The experimental work for the research of two main factors as laser beam power and scanning speed showed the technological gaps for the formation of the stable tracks. The characterization of the non-stable single tracks’ defects is established. The new data about the main physical effects in the treatment zone is received by optical diagnostics of the process.

Abstract: Results of a target sputtering investigation have been obtained, the target being positioned on the bottom of a cylindrical hollow cathode covered by a grid. It was shown that influence on the glow discharge of a nonuniform magnetic field with lines crossing the target center as well as the grid, the hollow cathode and the target periphery, where the field lines are arc-shaped, depends on the magnetic induction on the target edge. Due to ionization by electrons emitted by the cathode and forced by the magnetic field to approach to the target more frequently the plasma density near the target grows up and more than a half of all ions produced in the discharge quite uniformly sputter the target

Abstract: The technological possibilities of 3D object manufacturing with complex geometry from heat-resistant cobalt alloy by method of selective laser melting is considered in the work. The boundary conditions of the SLM and the way of its overcoming are demonstrated.