Characteristics of Pore Morphology in Aluminum Alloy Foams Fabricated by Semi-Solid Route among Multiple Experimental Runs
Abstract
:1. Introduction
2. Materials and Methods
2.1. Fabrication Apparatus
2.2. Fabrication of Aluminum Alloy Foam through the Semi-Solid Route
2.3. Analysis of Fabricated Foams
3. Results
3.1. Fabricated Aluminum Alloy Foams
3.2. Temperature and Pressure history during fabrication
3.3. Pressure History during Fabrication
4. Discussion
4.1. Influence of H2 Generated through Decomposition of TiH2 during the Foaming Process
4.2. Reproductivity among Multiple Experimental Runs through the Semi-Solid Route
4.3. Characteristics of the Temperature and the Microstructure of the Foam with Poor Pore Morphology
4.4. Relationship between Clogged Cell Wall and the Volume Fraction of the Solid
5. Conclusions
- The fabrication process through the semi-solid route conducted in this study had reproductivity for the fabrication of the aluminum alloy foam. The fluctuation of ±1.3 °C (±2.5% in the volume fraction of the solid) around 612.5 °C, which is close to the setting temperature of 613 °C, does not have a major influence on the pore morphology.
- When the volume fraction of the solid increases, exceeding 15% in volume fraction of the solid, the number of clogged cell walls increases. An increase in the number of clogged cell walls is more effective for the clogging effect than the fraction of primary crystals in already clogged cell walls increases.
- The preferred range of the volume fraction of the solid for fabrication of stable foam, which was defined to have uniform pores with small diameter and high circularity in this study, is from around 15% to 35%. If the aluminum–silicon alloy foam is fabricated with a certain volume fraction of the solid, the clogging effect works most effectively, and the cell walls become most stable when the volume fraction of the solid is 35%.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Component | Si | Fe | Cu | Al |
---|---|---|---|---|
mass% | 6.4 | 0.0 | 0.0 | Bal. |
Component | O2 | CO | CO2 | H2O | N2 |
---|---|---|---|---|---|
volppm | 20 × 104 | <0.1 | <0.1 | <0.54 | Bal. |
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Takamatsu, S.; Arai, T.; Sayama, A.; Suzuki, S. Characteristics of Pore Morphology in Aluminum Alloy Foams Fabricated by Semi-Solid Route among Multiple Experimental Runs. Metals 2023, 13, 1654. https://doi.org/10.3390/met13101654
Takamatsu S, Arai T, Sayama A, Suzuki S. Characteristics of Pore Morphology in Aluminum Alloy Foams Fabricated by Semi-Solid Route among Multiple Experimental Runs. Metals. 2023; 13(10):1654. https://doi.org/10.3390/met13101654
Chicago/Turabian StyleTakamatsu, Satomi, Takahiro Arai, Akane Sayama, and Shinsuke Suzuki. 2023. "Characteristics of Pore Morphology in Aluminum Alloy Foams Fabricated by Semi-Solid Route among Multiple Experimental Runs" Metals 13, no. 10: 1654. https://doi.org/10.3390/met13101654