How come you can bend metal back and forth and eventually break it. What is happening at a molecular level. How does movement allow for such weakening of certain metal (all metals? idk).
In: Engineering
Metals are not pure cristalline structures extending from one extremity of the object to the other. Depending on the metal/alloy and the fabrication process, they form “grains” of variable dimensions that interact with each other. When your piece of metal is “fatigued” it means too much internal dislocations have taken place (=the grains are not as strongly bound together as they used to)
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