|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||A-21: Electron Microscopy Study of Non-metallic Inclusions in Additively Manufactured 17-4PH Stainless Steel Parts
||Yu Sun, Mark Aindow, Rainer J. Hebert
|On-Site Speaker (Planned)
Traditional steel processing inevitably introduces non-metallic inclusions in microstructures with oftentimes detrimental effects on mechanical properties. Non-metallic inclusions are also present in 17-4 PH virgin powder that is used for additive manufacturing and are furthermore observed in parts that were manufactured with a 3D Systems ProX-300 powder bed machine. In this study, advanced analytical electron microscopies (TEM, SEM) are applied to characterize the morphology, chemistry and size of non-metallic inclusions in 17-4 PH virgin powders and parts. Inclusion particles vary in size from tens of nanometers to several micrometers in diameter. The similarity in size and chemistry between the inclusions in the starting powders and the finished parts suggests that the inclusions in the starting powder are maintained in the final parts. The apparent survival of inclusions during the additive manufacturing process offers opportunities to control additively manufactured part properties with initial powder control.
||Planned: Supplemental Proceedings volume