Documents / Report
This January 2026 supplement from the All-domain Anomaly Resolution Office (AARO) adds historical context to an Oak Ridge National Laboratory analysis of a metallic specimen. The specimen was reportedly recovered in the mid-1990s from private property near Flint Ridge State Park, Ohio, after the owner saw a large unidentified airborne object. ORNL found it consistent with an ordinary aluminum alloy and detected no radioactivity. AARO concurs and assesses that the specimen is most likely a conventionally manufactured aluminum-silicon alloy, possibly from casting, recycling or an automotive fire.
2 consistency with contemporary alloys and incompatibility with high-performance applications, AARO assesses that the specimen is most likely an ordinary, conventionally manufactured aluminum alloy. 1 Jolly, M., & Katgerman, L. (2022). Modeling defects in aluminum cast products. Progress in Materials Science. https://doi.org/10.1016/j.pmatsci.2021.100824 2 Davis, J.R. (2001). Alloying: Understanding the Basics (1st ed., p. 378). ASM Intl. Available online: Aluminum and Aluminum Alloys 3 Ibid. (pp. 392-395) 4 Ganesh, M.R.S., Reghunath, N., J.Levin, M. et al. Strontium in Al–Si–Mg Alloy: A Review. Met. Mater. Int. 28, 1– 40 (2022). https://doi.org/10.1007/s12540-021-01054-y 5 Davis, J.R. (2001). Alloying: Understanding the Basics (1st ed., pp. 365-366, 404). ASM Intl. Available online: Aluminum and Aluminum Alloys 6 Ibid. (pp. 365-366) 7 Ibid. (p. 354)26-P-0218
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Report, from the aaro collection. The PDF is mirrored here; the original link is above. 2 pages are in the text index: search them above, or from the library's search.