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Stress Relief, which takes place only with vibration and without any other process, is a system that takes place by exposing the stresses from the past of the material to vibration without heating it.
First, a dynamic tension environment is created within the material by giving vibration energy. Thus, permanent deformations occur at the points where the sum of the stresses created and the existing internal stresses exceed the strength of the material. Afterward, partial dissolution of residual internal stresses is achieved. It is called partial dissolution because mechanical vibration is a process that files the pointedness in the inner stress distribution. In other words, it can be called conditioning with vibration.
The resistance of the residual stresses on the metal causes the workpiece to reach the resonance frequency late and the frequency value to be high
After the vibration stress relief process, the resonance frequency value of the workpiece decreases. This decrease in the frequency value is an indication that the stress relief was successful.
In heat treatment, energy is applied to the materials in the form of heat to relieve stress, and in the vibration method, energy is transferred to the workpiece through mechanical vibrations. Thanks to the said energy, residual stresses are distributed homogeneously and are reduced below the acceptable level.