Vibratory Stress Relief - Resonant Vibration Method
for Reducing Residual Stresses in Welded or Machined Fabrications.

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Technical Papers

Stress Relief of Weld by Heat Treatment and Vibration:
A Comparison Between the Two Methods

Abstract
Introduction
Sources of Residual Stress
Effects of Residual Stress
Effects of Residual Stress on Welds
Stress Relief by Heat Treatment
Stress Relief by Vibration (VSR)
Measuring the Extent of Stress Relief
Experimental Section
Conclusions

EFFECTS OF RESIDUAL STRESS ON WELDS

Among others, the effects of residual stress on welded parts are the following:

a) Residual stress is added to the load the weld has been designed to support, which can lead to the collapse of the material.

b) Reduction of stress corrosion resistance. The regions submitted to elastic tensile stress may suffer localized corrosion in aggressive environments.

c) Risk of cracks. All cracking mechanisms are affected by residual stress and distortion caused by localized heating. .

 

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