Characterization of bulk to thin wall mechanical response transition in powder bed AM
作者： Ben Brown , Wes Everhart , Joe Dinardo
关键词: Powder bed 、 Cathode ray 、 Materials science 、 Composite material 、 Characterization (materials science) 、 Power (physics) 、 Fractography 、 Thin wall 、 Surface roughness 、 Selective laser melting
摘要: Purpose In the development of powder bed additive manufacturing (AM) process parameters, characterization mechanical properties is generally performed through relatively large test samples that represent a bulk response. This provides an accurate representation for equivalently sized or larger parts. However, as feature size reduced, transition from standard response to thin wall where lower power border scans and surface roughness have effect. Design/methodology/approach For this study, thickness varying between 4.0 0.25 mm were built in 304L on selective laser melting (SLM) platform Ti-6Al-4V electron beam (EBM) platform. Samples then mechanically tested, fractography was analysis. Findings This study experimentally identifies threshold SS SLM EBM A possible method improving those shifting smaller thicknesses by manipulation scan pattern investigated. Originality/value This novel investigation into effect reduced part produced AM.
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