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The weld seam is generally the weak point of welded mechanical parts subject to fatigue loading. For this issue, a post-weld mechanical surface process called high-frequency mechanical impact (HFMI) was developed. This process combines both mechanical effects and a weld geometry improvement by generating compressive residual stresses and making a smoother transition between the base plate and the...
It is well known that fatigue strength of welded structures is affected by welding residual stresses. Residual stresses influence crack propagation at weld toe or root. This reduces the effectiveness of the structure and increases its construction and maintenance costs. A mechanical post-weld treatment such as HFMI (high-frequency mechanical impact) has been found to exhibit a significant fatigue...
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