Features of Solid-Solution Hardening and Temperature Dependence of the Critical Shear Stress in Binary and Multicomponent Alloys
FIRSTOV S.O. and ROGUL T.G.
I.M. Frantsevich Institute for Problems in Materials Science of the N.A.S. of Ukraine, 3 Omeljan Pritsak Str., UA-03142 Kyiv, Ukraine
Received 21.03.2024, final version 26.07.2024 Download PDF
Abstract
The paper analyses the hardening of binary and multicomponent solid solutions (including high-entropy alloys (HEAs)); addresses the notion of a compositional–cluster structure of binary solid solutions with unlimited solubility to propose an equation describing the concentration dependence of the critical shear stress; presents findings from a comparative analysis of the temperature dependences for critical shear stress (yield stress) for a series of binary and multicomponent solid solutions and pure metals with b.c.c. and f.c.c. lattices; considers potential mechanisms, which lead to a ‘plateau’ on the temperature dependence of critical shear stress for binary and multicomponent solid solutions and for pure metals; discusses the specifics of athermal hardening of HEAs and proposes a relatively simple equation for assessing their athermal hardening; and addresses the capabilities of using the x-ray diffraction to determine the root-mean-square displacements of atoms from ideal positions at crystal-lattice sites, $\sqrt{U^2}$, and crystal-lattice microdistortions, $\varepsilon$, in multicomponent solid solutions.
Keywords: binary and multicomponent alloys, solid-solution hardening, yield stress, critical shear stress.
DOI: https://doi.org/10.15407/ufm.25.03.545
Citation: S.O. Firstov and T.G. Rogul, Features of Solid-Solution Hardening and Temperature Dependence of the Critical Shear Stress in Binary and Multicomponent Alloys, Progress in Physics of Metals, 25, No. 3: 545–569 (2024)