The stress accumulated in the metal can be relieved through heat treatment. In a word, stress is relieved by heating. However, it is a recovery to the previous state. The stress is relieved, but the structure is already deformed. But what if you do more heating in this state? New things happen. Re-crystallization! A crystal structure, which can be said to be the basic unit constituting the metal..
In mechanical engineering, resistance to external forces is stress. The stress that is 'stacked' inside the material is called the residual stress. We often say "Oh! It's stressful." It's a very engineering expression to say. Eventually, the accumulated stress will exceed the level that can be sustained, and the material will break off. There is no way to avoid the accumulation of stress. It is ..
Deformation occurs when any material is applied to a load, and breakage occurs when the deformation is too large. Sometimes the fracture occurs at a much lower strength, even though the breaking strength that the material can endure is determined. It happens at very unpredictable timing. Such a load is called fatigue load. Such fracture is caused by fatigue. So fatigue is dangerous. This is beca..
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