'This was absolutely stunning to watch first-hand.'
While tugging at a 40-nanometer-thick piece of platinum inside a vacuum 200 times a second, the team observed how the material could mend itself under an electron microscope.
They claim it's the first time we've ever witnessed a piece of metal crack and then fuse back together by itself, a fascinating new phenomenon on its own, but also one that could "usher in an engineering revolution," according to aUnder repeated pressure, machines tend to wear out over time due to stresses that can cause microscopic cracks, which eventually grow and cause the device to fail.
But the new finding suggests that metals may have a secret way to heal themselves, negating these microscopic fractures. "What we have confirmed is that metals have their own intrinsic, natural ability to heal themselves, at least in the case of fatigue damage at the nanoscale," said Texas A&M University materials scientist Brad Boyce, co-author of a
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