About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing for Energy Applications IV
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Presentation Title |
Implications of Zr Additions for High-temperature Performance of Additively Manufactured Aluminum Alloys |
Author(s) |
Richard A. Michi, Kevin Sisco, Sumit Bahl, Ying Yang, Jonathan Poplawsky, Lawrence Allard, Ryan Dehoff, Alex Plotkowski, Amit Shyam |
On-Site Speaker (Planned) |
Richard A. Michi |
Abstract Scope |
Additions of Zr are regularly employed in AM Al alloys to reduce hot tearing through nucleation of equiaxed grains. Additionally, precipitation of L12-Al3Zr nanoprecipitates provides strengthening upon heat treatment. Several AM Al alloys have recently shown promise for use in the 250–400 °C temperature range where traditional Al alloys lose their strength, so it is of particular interest to understand the implications of Zr additions for high-temperature performance of AM Al alloys. In this talk, we compare the high-temperature mechanical behavior, including creep, of Zr-free and Zr-bearing AM Al-Ce-Ni-Mn and Al-Ce-Ni-Mn-Zr alloys. Phase selection and microstructural changes on multiple length scales, from micron-scale grains to nanometer-scale L12-Al3Zr precipitates are evaluated and correlated to the high-temperature performance, with discussion of insights for AM high-temperature alloy design. APT was conducted at ORNL’s CNMS, which is a U.S. DOE Office of Science user facility. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, High-Temperature Materials |