Heat Treatment of Aluminum Alloys with the Natural Combination of Dopants

Abstract

Aluminothermic reduction without the separation of individual metals is currently considered as a possible method for processing ferromanganese sea nodules and creating new alloys. In this study, the product of their reduction—a manganese-based polymetallic mixture—was added to pure aluminum, as a mixture of alloying elements in their natural ratios. After extrusion, two new aluminum alloys with a total percentage of metallic additives ranging from 1 to 6 percent were prepared. The possibilities of the precipitation strengthening of these aluminum alloys, especially those containing Mn, Fe, Si, Ni, and Cu, were investigated under a wide range of heat treatment conditions. After each tested combination of annealing and artificial aging temperatures, the phase composition and the microstructure changes were recorded by X-ray diffraction, optical, and scanning electron microscopy with EDS analysis. Under none of the tested heat treatment conditions is a significant hardening effect observed, even though the precipitate phases are observed by TEM. However, the changes in the morphology of the present intermetallic phases caused by the heat treatment are revealed, which highlights the further possible development of these multicomponent alloys.

Comparison of microstructure and mechanical properties of industrial pure aluminum produced by powder metallurgy and conventional rolling

“…June, 2023 Vol.7 No. 19 This result was evident after the nondestructive inspection, which shows the need of nondestructive testing in component manufactured using P/M +HIP.…”

“…June, 2023 Vol.7 No. 19 Nondestructive evaluation (NDE) techniques are utilized to look for internal porosity and establish control samples with known porosity size and distribution. In this case, the nondestructive inspection using X-ray microfocus CT cabinet system for 3D metrology and analysis model PHOENIX V/GTOME/XM was applied to the P/M+HIP aluminum billet.…”

“…It is well known that impact toughness is influenced by many known factors. Not only is heat treatment a critical parameter, but also the amount of Sr, Fe, Mg, grain size, defects and microstructure [18][19][20][21][22][23]. In this case it is clear that only the grain size does not explains the low impact toughness but defects such as small voids or porosity does.…”

“…7 No. 19 [23][24][25][26][27][28][29][30][31] SALGADO-LÓPEZ, Juan Manuel, MARTINEZ-FRANCO, Enrique, CRUZ-GONZÁLEZ, Celso Eduardo and TELLO-RICO, Mauricio. Comparison of microstructure and mechanical properties of industrial pure aluminum produced by powder metallurgy and conventional rolling.…”

“…June, 2023 Vol 7. No 19. 23-31 SALGADO-LÓPEZ, Juan Manuel, MARTINEZ-FRANCO, Enrique, CRUZ-GONZÁLEZ, Celso Eduardo and TELLO-RICO, Mauricio.…”