Effect of compositional changes on microstructure in additively manufactured aluminum alloy 2139
| Autor: | Catherine M. Bishop, John A. Newman, Anna Sokolova, Milo V. Kral, Wesley A. Tayon, Craig A. Brice |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Magnesium Mechanical Engineering Alloy chemistry.chemical_element 02 engineering and technology Substrate (electronics) engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences chemistry Mechanics of Materials Aluminium Phase (matter) 0103 physical sciences Vaporization engineering General Materials Science Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Materials Characterization. 143:50-58 |
| ISSN: | 1044-5803 |
| Popis: | A matrix of nine experiments was conducted on aluminum alloy 2139 samples made by an electron beam directed energy deposition additive manufacturing process to characterize the effect of magnesium vaporization loss on microstructure and properties. The nine-sample matrix included three different magnesium levels deposited onto material at three different temperatures. The goal was to quantify the variability in the deposited material as a function of allowable magnesium content and the local temperature of the substrate or previous layer. The results show that temperature variations in the substrate up to 100 K have no significant effect on the amount of magnesium loss; however, relatively large variations in Mg content, up to a ±0.25 wt%, can significantly affect the microstructure and mechanical properties. This is due to a change in how the precipitate phase forms, which influences the mechanism by which the alloy is strengthened. |
| Databáze: | OpenAIRE |
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