Microstructure and properties of metastable nanostructured alloys processed by severe plastic deformation
V.V. Stolyarov
Mechanical Engineering Research Institute of RAS
DOI: 10.26456/pcascnn/2025.17.190
Review
Abstract: A brief literature review of foreign studies and our own experimental data on the use of severe plastic deformation by equal-channel angular pressing for the formation of a nanostructure in bulk metastable alloys of various natures is presented. It is shown that such materials, due to bulk phase and structure transformations (deformation dissolution, artificial and natural aging, polymorphic) have greater practical potential for improving mechanical and physical properties compared to pure metals or solid solutions. The article considers the structural features, physical and mechanical properties of structural alloys based on aluminum, titanium and hard magnetic alloys based on the Nd(Pr)2Fe14B compound after severe plastic deformation and additional annealing. In the aluminum alloy Al-Fe with the absence of iron solubility under normal conditions, severe deformation allows dissolving up to 0.6% Fe, obtaining a composite structure and increasing the strength properties many times. In commercially pure titanium VT1-0 and titanium alloy VT6 subjected to equal-channel angular pressing, low-temperature post-deformation annealing causes aging, accompanied by an increase in microhardness and strength. In the cast hard magnetic alloy Pr-Fe-B-Cu, refinement is also observed during equal-channel pressing and an increase in magnetic hysteresis properties.
Keywords: Al based Al-Fe alloy, Ti based VT1-0 and VT6 alloys, hard magnetic Nd-Fe-B-Cu, equal channel angular pressing, postdeformation annealing, nanostructure, strength, magnetization, coercitivity
- Vladimir V. Stolyarov – Dr. Sc., Professor, Chief Researcher,, Mechanical Engineering Research Institute of RAS
For citation:
Stolyarov V.V. Mikrostruktura i svojstva metastabilnykh nanostrukturnykh splavov, poluchennykh intensivnoj plasticheskoj deformatsiej [Microstructure and properties of metastable nanostructured alloys processed by severe plastic deformation], Fiziko-khimicheskie aspekty izucheniya klasterov, nanostruktur i nanomaterialov [Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials], 2025, issue 17, pp. 190-202. DOI: 10.26456/pcascnn/2025.17.190. ⎘
Full article (in Russian): download PDF file
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