Abstract
Al-Sn alloys were produced by the induction melting method with different Bi additions. Microstructure shows grains 130 μm average size. Fracture toughness and hardness tests have shown that ternary alloying elements present significantly affected the samples with Bi alloying. Plastic deformation was evaluated by using the forging test; the results have shown that the addition of 3.5 at.% Bi increased the value at least twice as compared with unalloyed sample. Wear test indicated that bismuth slightly affected the tribological behavior. It was found that a concentration of 3.0 at.% Bi, considerably enhances the alloys performance.
Highlights
The applications of Aluminum alloys in aerospace and automotive industry have been the main focus for many years, especially in construction of structural components
The sample in the annealing condition shows different zones, where Aluminum majority is present in matrix. It can be observed the presence of tin as a separate phase in form of reticular structure, which is obtained by increasing the Sn content
We present the interaction of the microstructures of Al-Sn-Bi alloys with the mechanical properties, reporting the optimal Bi concentration to improve the alloys performance
Summary
The applications of Aluminum alloys in aerospace and automotive industry have been the main focus for many years, especially in construction of structural components. Friction and wear are of considerable importance in most of the structural components, in bearing applications. No information is available related to the mechanical effect of Bi in aluminium alloys at these concentrations.
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