Affiliation:
1. Air Force Research Laboratory, Aerospace Systems Directorate, Wright-Patterson AFB, Dayton, OH 45433
Abstract
Abstract
The fatigue life behavior and internal surface conditions of inherently damped additive manufactured (AM) specimens subjected to vibration bending are under investigation. This study supports research that demonstrated 95% vibration suppression due to damping capability of AM components with 1–3% internal volume of unfused powder; however, the viability of fatigue performance is unknown. The following effort explores whether internal wall damage caused by unfused powder particle motion debits fatigue life. Comparisons between the fatigue behaviors of unfused powder pocket and fully fused nickel based alloy 718 specimens confirms a long suspected powder interaction phenomena critical to damping performance.
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
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