Influence of tungsten nanoparticles on microstructure and mechanical properties of an Al-5%Mg alloy produced by casting

This paper investigates the impact of tungsten nanoparticles on the microstructure and mechanical properties of the Al-5Mg alloy. Tungsten concentrations of up to 0.5 wt.% led to a slight modification of the Al-5Mg alloy microstructure, and grain refinement occurred due to the inhibition of crystal growth along the boundaries. Dispersion hardening with tungsten nanoparticles made it possible to increase the ultimate strength by the Orowan mechanism with a simultaneous increase in the plasticity of the Al-5Mg alloy. An increase in the tungsten content to 0.8 wt.% made it possible to modify the microstructure of the Al-5Mg alloy, due to the formation of the Al12W phase and an increase in crystallisation centres. The modification of the microstructure, as well as dispersion strengthening by nanoparticles, led to a simultaneous increase in the yield strength, ultimate tensile strength, and ductility of the Al-5Mg alloy

The influence of the Al3Er intermetallic compound on the structure, physicomechanical characteristics and fracture of the A–0359.0 alloy

In this work, we studied the effect of the intermetallic compound Al3Er on the structure of the aluminum alloy A–0359.0, its physical and mechanical properties and the nature of destruction. It was shown that the introduction of 0.3 wt. % into the melt A–0359.0 reduces the average size of dendrites and microhardness values, does not affect the density and hardness values, and increases the values of tensile strength and maximum deformations before fracture. The investigated alloys demonstrate a similar deformation behavior, while the fracture surface of the A–0359.0 alloy containing 0.3 wt. % Er, is significantly developed in comparison with the initial alloy

Influence of tungsten nanoparticles on the structure and mechanical behavior of AA5056 under quasi-static loading

The paper investigates the effect of tungsten nanoparticles on the structure and mechanical properties of aluminum 5056 alloy. Using optical and scanning electron microscopy, the structure of the AA5056-W composite and the initial alloy is investigated. Introduction of 0.5 wt. % of tungsten nanoparticles does not modify the structure of the aluminum alloy, but due to dispersed hardening, it can increase the hardness and the values of the yield stress, ultimate tensile strength, and maximum deformations before fracture of the metal matrix. The Orowan mechanism prevails in increasing the machinical properties of aluminum 5056 alloy with dispersed hardening with tungsten nanoparticles. The destruction of materials is caused by the uneven distribution of tungsten nanoparticles in the aluminum matrix