About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Aluminum Alloys, Processing and Characterization
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Presentation Title |
Interaction between Recrystallization and Second Phase Particles in Al-Mn Alloy with Impurities (Fe, Si) |
Author(s) |
Kazuha Yamase, Ken-ichi IKEDA, Seiji Miura |
On-Site Speaker (Planned) |
Kazuha Yamase |
Abstract Scope |
Impurities (Fe, Si) in Al-Mn alloys contribute to precipitates formation during thermal processing and introduction of large particle during solidification. Also, second phase particles affect recrystallization, e.g. “Particle Stimulated Nucleation (PSN)” and “Zener Pinning”. In this study, with various amount of impurities in Al-Mn alloy, we clarified the difference in morphology of second phase particles and in recrystallized structure.
Low purity Al-1Mn alloy (2N-1Mn) and high purity Al-1Mn alloy (4N-1Mn) were hot-rolled and subsequently annealed at 300 °C, 400 °C, and 500 °C, respectively. SEM-EBSD and SEM-BSE observation revealed the following phenomena. In 2N-1Mn, recrystallization nucleation was found to be promoted by PSN, and Zener Pinning was strong due to fine precipitates. Namely, many recrystallized grains were present and remained small. In contrast, in 4N-1Mn, PSN was little because constituent particles were few, and precipitates were coarsened faster than 2N-1Mn. Therefore, the recrystallized grains overcame the Pinning and became large. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Aluminum, Characterization, Mechanical Properties |