|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
||Microstructure and Mechanical Properties of 17-4PH Stainless Steels Manufactured by Material Extrusion Additive Manufacturing
||Yong-Hoon Cho, So-Yeon Park, Ju Yong Kim, Kee-Ahn Lee
|On-Site Speaker (Planned)
Metal Material Extrusion Additive Manufacturing (M-MEAM) is a building process by extruding a filament composed of metal powders and polymer binder layer-by-layer. M-MEAM has been getting interest because of its superior economic feasibility and accessibility than other metal AMs. In this study, 17-4PH stainless parts were manufactured by using M-MEAM with post sintering process. And subsequent heat treatments (HT) were also conducted. Its microstructure and mechanical properties were investigated according to HT conditions. Microstructure observation demonstrated that the fraction and distribution of precipitations, such as nm size Cu-rich phase, were varied by HT conditions. Tensile test results showed that the HT could improve the tensile strength to 1.34 GPa, the yield strength to 1.1 GPa and the elongation to 7.6 %, which were close to ASTM wrought material’s properties. The deformation and fracture mechanisms of 17-4PH alloy manufactured by M-MEAM was also discussed in relation with the microstructures.
||Additive Manufacturing, Iron and Steel, Mechanical Properties