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Characterization of 17-4 PH Processed via Bound Metal Deposition (BMD)

2020; Springer International Publishing; Linguagem: Inglês

10.1007/978-3-030-36296-6_19

2367-1181

Alexander Watson, John Belding, Brett D. Ellis,

Injection Molding Process and Properties

Advancements in selective laser sinteringSintering (SLS) and electron beam meltingMelting (EBM) additive manufacturingAdditive manufacturing (AM) of metals have led to reduced lead times, increased geometric freedom, and enhanced part functionality; however, SLS and EBM are plagued by relatively high capital and operational costs. With costs approximately 60–80% less than SLS or EBM, bound metal deposition (BMD)Bound Metal Deposition (BMD) is a new AM process in which a metal powder-binder compositeComposite material is printed sequentially in layers, debound, and sintered to form a 96–99%-dense part. This work characterizes the microstructuresMicrostructures and mechanical propertiesMechanical properties of 17-4 PH stainless steel17-4 PH stainless steel material within a BMDBound Metal Deposition (BMD) process. Microstructure characterizationMicrostructure characterization includes scanning electron microscope (SEMScanning Electron Microscopy (SEM)) images of printed, debound, thermally debound, and as-sintered specimens, and porosityPorosity analysis of a cross section excised perpendicular to the longitudinal axis of a tensile coupon. Mechanical characterization includes monotonic, quasi-static tensile data (e.g., modulus, yield strength, ultimate strength, and ductility) and hardness testingHardness testing. This work is significant in that characterization studies are required to understand BMDBound Metal Deposition (BMD) process-structure-propertiesProperties relations prior to realizing commercial opportunities.