Functionally oriented composite layered materials with martensitic transformations

Abstract

The studies carried out show that the task of ensuring the reliability and expanding the functionality of products operating under multifactorial effects (temperature, force and deformation) can be successfully solved by using functionally oriented surface composite materials with thermoelastic martensitic transformations (TMTs). The authors proposed the technology of layer-by-layer synthesis of functionally oriented composite layered materials with TMTs in an argon (Ar) environment, implemented on patented equipment in a single technological cycle. This technology determines not only the novelty but also the economic feasibility of technical solutions. The authors also suggested step-by-step methods of thermal and thermomechanical treatment of composite layered materials with TMTs, which contribute to structural stabilization while decreasing residual stress. On the basis of complex X-ray diffraction and electron microscopic studies, the authors determined the structural parameters of high-velocity oxy-fuel (HVOF) materials obtained by HVOF with subsequent thermal and thermomechanical treatment and ceramic materials zirconium dioxide (ZrO2)–yttrium (III) oxide (Y2O3)–cerium (IV) oxide (CeO2)–aluminum oxide (Al2O3) stabilized with aluminum oxide with subsequent heat treatment. The authors investigated the microhardness of surface high-entropy and ceramic materials. Tests for ‘friction wear’ and mechanical high-cycle fatigue of steels with a composite surface laminate showed a decrease in the wear rate and an increase in cyclic durability.