Post by Jairan Nafar Dastgerdi

📢 Excited to share our latest publication in Engineering Failure Analysis! “Defect-interaction-deriven fatigue life scatter in additively manufactured metals: a mechanistic framework”, https://lnkd.in/eWfKyTvn Our paper introduces a new mechanistic framework that explains one of the biggest challenges limiting the structural adoption of metal additive manufacturing: fatigue-life scatter. Rather than treating fatigue scatter as a purely statistical phenomenon, we demonstrate that it is governed by the interaction and spatial arrangement of process-induced defects, which control the formation of the initial fatigue-critical crack. Using XCT-based characterisation and fatigue crack growth modelling, we identify the defect configurations responsible for the largest reduction in fatigue life and propose a pathway towards physics-informed defect acceptance criteria, reliability-based fatigue design, and more effective process optimisation. This work provides a step towards improving the qualification and certification of fatigue-critical additively manufactured components. It was a pleasure collaborating with Ahmad Serjouei , Mohammad Malekan , and Bijan Mohammadi #AdditiveManufacturing #MetalAM #Fatigue #FatigueLife #StructuralIntegrity #MaterialsScience #FailureAnalysis #EngineeringFailureAnalysis #MechanicalEngineering #XCT #Reliability #FractureMechanics #Research