Work

Gradient Microstructure of Ag–Cu Metastable Metal-Matrix Composite Processed by Complex Extrusion: A Preliminary Study

Year: 2026

Type: article

Abstract: Severe plastic deformation is an effective process to modify materials’ structures. In this work, its new modification entitled channel angular extrusion was applied to a metastable metal-matrix composite consisting of a Ag matrix and spherical Cu particulates. During this process, the rod sample deforms in an inhomogeneous way and exhibits a gradient microstructure that is characterized by ellipsoidal Cu particulates at the edge of the sample but elongated and fragmented rectangular ones in the center. In addition to the different shapes, the edge and center of the sheet also differ in preferential orientations: the ⟨110⟩ direction predominates in the center of the sheet, while the ⟨111⟩ direction dominates at the sheet edge. The changed angle of the {111} shear plane relative to the extrusion direction explains these differences.

Source: Metals

DOI: 10.3390/met16010089

Authors: Pavel Lejček, Drahomír Dvorský, Orsolya Molnárová, Filip Průša, Stanislav Habr, Angelina Strakošová

Institutions: Czech Academy of Sciences, FZU - Institute of Physics of the Czech Academy of Sciences, University of Chemistry and Technology, Prague

Language: English

Topic: Microstructure and mechanical properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,137

Funders: Grantová Agentura České Republiky, Akademie Věd České Republiky