About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques II
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Presentation Title |
In Situ Synchrotron Analysis of Aging in Commercial High Strength 7000 Series Additive Aluminum Alloys |
Author(s) |
John H. Martin, Darby LaPlant, Fan Zhang, David Beaudry, Patrick Callahan |
On-Site Speaker (Planned) |
John H. Martin |
Abstract Scope |
HRL Laboratories has commercialized the high strength (>600MPa Yield Strength) 7000 series alloy, registered as 7A77, utilizing unique zirconium based functionalization to eliminate hot cracking. The resulting as-built microstructure is highly distinctive from typical wrought 7000 alloys containing fine grains (<5 microns) and grain boundary segregation of strengthening elements (e.g. Zn,Cu,Mg). Experimental results have indicated a more rapid aging response than wrought alloys. For the first time high strength 7000 series alloys produced by additive manufacturing were subjected to in-situ aging under synchrotron radiation to obtain small and ultra-small angle x-ray scattering (SAXS and USAXS) information over 24 hours. Aged coupons were subsequently analyzed via atom probe tomography to quantify size and shape distribution of precipitates. This presentation will highlight the aging behavior of this alloy, the unique aspects observed, and recommendations for improved aging regimes. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Characterization |