Documents / Report
This synopsis was prepared by Oak Ridge National Laboratory for the All-domain Anomaly Resolution Office (AARO). It reports on an analysis of drill shavings and a small bulk piece from a metallic specimen claimed to be linked to an unidentified phenomenon over central Ohio around 1995. Chemical assays, microscopy, computed tomography and gamma spectroscopy showed a conventional near-eutectic aluminum-silicon casting alloy that had cooled slowly and gave off no radiation. The report concludes the specimen is ordinary terrestrial industrial metal with no evidence of exotic origin.
Synopsis: Analysis of a Aluminum Specimen9 4. Conclusion Analysis of the sample indicates it is a conventional, terrestrial aluminum alloy produced using standard methods available since at least the late 1970s. The alloy families aligned with the sample (Table 3) are widely used for cast housings, brackets, pump or compressor bodies, gear cases, and similar appli‑ cations where castability and good dimensional fill are prioritized. The microstructure of both the bulk sample and shavings suggests the material was slow‑cooled, consistent with origination from a larger original part. Specifically, the specimen is consistent with industry standards such as A413.1/369.1, conventional near‑eutectic aluminum–silicon casting alloys. Based on multiple analytical approaches, its features align with ordinary aluminum metallurgy, and no data indicate anomalous emissions or extraordinary origin. As with any forensic materials assessment, our conclusions apply to the samples examined. Our con‑ clusions reflect the characteristics and composition of these samples, within the agreed scope of work.
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Report, from the aaro collection. The PDF is mirrored here; the original link is above. 10 pages are in the text index: search them above, or from the library's search.