Plastic deformation and properties of new Pd-Ag(Au)-Rh alloys for jewelry and technical purposes
Sidelnikov S.B. Lopatin V.A. Ditkovskaia Y.D. Lezhnev S.N. Belyaev S.V. Lopatina E.S. Novikova O.S. Voroshilova M.V. Konstantinov I.L. Galiev R.I. Belokonova I.N.
March 2026Springer-Verlag Italia s.r.l.
International Journal of Material Forming
2026#19Issue 1
Developing new technologies for producing long, deformed, industrial-grade semi-finished products from palladium-based alloys is a pressing need for high-value products that meet European quality and safety requirements. This study addressed the development of thermal deformation processing technology for producing rods and wire from new palladium-based alloys. The aim of the research was to develop energy- and resource-saving technologies for the thermal deformation processing of new palladium alloys to produce long, semi-finished jewelry and industrial products with high strength and performance properties. Two palladium alloys, patented by the authors, were selected for the study. The first is designed for the production of 0.3 mm diameter wire for jewelry chains, while the second is designed for the production of 0.5 mm diameter wire for contact manufacturing. A comprehensive study was conducted on these alloys using proprietary software and computer modeling to develop new reduction modes and processing routes for rolling and drawing processes. As a result, the characteristics of metal deformation, the stress-strain state were studied, and the force parameters of these processes were determined. It was established that the rolling force (92 kN) and drawing force (5 kN) are low, therefore the equipment load does not exceed permissible values. Moreover, the safety factor ηв for transitions for producing wire with a diameter of up to 0.5 mm is 1.7, which indicates high stability of the metal deformation process during drawing. Experimental studies were conducted to verify the modeling results, which confirmed the modeling results and made it possible to determine the strength properties and evaluate the metal structure during processing of the studied alloys. The level of strength properties of the metal (ultimate resistance σв) at maximum degrees of deformation of up to 92–98% is within the range of 829–847 MPa for the first alloy and 632–777 MPa for the second. This allows for the deformation of semi-finished products made from new palladium alloys without fracture, which is also confirmed by the Cockcroft-Latham index, which does not exceed the critical value of 1. Thus, comprehensive studies have been conducted that allow us to confirm that the developed technologies allow for the production of long semi-finished products in the form of rods and wires made from new palladium alloys with high strength and performance properties.
Computer modeling , Mechanical properties , Microstructure , Palladium , Wire
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Siberian federal university, Krasnoyarsk, 660025, Russian Federation
Rudny Industrial Institute, Rudny, 111500, Kazakhstan
Siberian federal university
Rudny Industrial Institute
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026