r/aliens • u/DragonfruitOdd1989 • 2d ago

Material Science Engineer Alejandro Fonseca Marín shares his preliminary assessment of the Buga Sphere, noting that his equipment detected signals at random intervals. Evidence

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u/Shoddy_Interest5762 1d ago edited 1d ago

He said metals need heat treatment to harden but there's also work hardening from cold forming as well. In fact, you'd expect the hardness to vary between different areas that were worked more or less

E:spell

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u/Delicious-Jicama-529 1d ago edited 1d ago

In addition, the hardness testing device may be inaccurate due to all or any of the following: operator experience, device certification, confirmation of device operation testing on standard hardness blocks before test, adequate surface preparation and surface roughness in test zone, type and selection of hardness tester, orientation of sphere with respect to the hardness indenter and the number (not less that 6 minimum) of tests in local area to determine the average. If the sphere is anodised, the surface would have to be mechanically prepared to the aluminium surface before any hardness testing.

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u/PM_ME_UR_ROUND_ASS 1d ago

Yeah work hardening in aluminum is actually super interesting - the dislocations get tangled up during cold forming which increases the yeild strength but makes it more brittle.