Nanostructural peculiarities affecting strength and crack growth resistance of a Ti-Si-X composite at room and high temperatures up to 800 °C
Year: 2025
Type: article
Abstract: High-temperature Ti-based composites belong to a new class of materials possessing chemical inertness, high strength and fracture toughness, moderate ductility, and high-temperature corrosion resistance. Since these composites exhibit a set of specific physical and chemical properties under harsh conditions, they are applied for fabricating critical parts of high-temperature structures and chemical equipment. In this work, a simple method of producing a novel Ti-based composite (Ti-Si-Al-Zr-C system) by arc melting an α-Ti alloy blank, Zr pellets, SiC powder, and Ti 3 SiC 2 MAX phase powder has been developed. Phase and microstructure analyses of the studied Ti-Si-X composite were performed, and its flexural strength and fracture toughness were estimated at room and high temperatures in a range of 400 °C to 800 °C, with the determination of dominant fracture micromechanisms. High levels of flexural strength and fracture toughness, exhibiting an advantage over known commercial high-temperature Ti-based alloys and Ti-based composites, were achieved in the Ti-Si-X composite at both room and high temperatures up to 700 °C. The ways of further increasing these parameters and limitations in operating temperature of the composite were substantiated based on the main nanostructural factors that affect the integrity of the composite.
Source: Results in Engineering
Institution: Lviv Polytechnic National University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,940
OpenAlex ID: W4415901119