1. Application of optical coherence tomography for improved in-situ flaw detection in nylon 12 selective laser sintering (Thesis)

    Application of optical coherence tomography for improved in-situ flaw detection in nylon 12 selective laser sintering (Thesis)

    Despite significant advances made since the inception of selective laser sintering (SLS), many of the same problems identified by early researchers including high part porosity, inadequate surface finish, and part strength uncertainty persist today. Because of these challenges, quality validation and improved process control continue to be identified as critical areas of improvement in industry roadmaps. To address these issues, an optical coherence tomography (OCT) sensor is investigated for feasibility of use in in-situ flaw detection in SLS. Benchtop OCT imaging of nylon in solid, liquid, and resolidified phases revealed subsurface imaging through liquid and resolidified nylon material was possible ...

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