Ive always liked to take things apart, to fix them or to figure out how they work. But a problem that i encounter and something that always deters me from trying to take something apart is when there is a part clamped onto a piece where i have to bend metal to separate them instead of removing screws.
The problem with this is that if you bend and unbend a piece of metal too many times, all that strain causes fatigue in the part. When this is a possibility im usually sure that the part wont be as strong as it was before you took it apart.
What i want to know is What is it that causes fatigue?
Intuitively i think its just that as the metal heats it gets soft and afterwards is liable to break off the next time you try to bend it. Is this the case? or is it something else?
If its not that the metal is softer from the heat of being bent, then what is it? and what is it that i can do to reduce the metal's tendency to break off.