Characterisation of Microstructure and Mechanical Properties of 17-4PH Parts Produced with the Lithography-based Metal Manufacturing Technology

The lithography-based metal manufacturing (LMM) process is a novel additive manufacturing technique that enables the sinter-based manufacturing of metal parts with high dimensional precision and exceptional surface quality. To effectively apply this technology, comprehending the relationship between mechanical properties and printing orientation is imperative. Given the relative novelty of this technology, our study seeks to explore the influence of manufacturing orientation on both the mechanical properties and shrinkage behaviour of stainless steel 17-4PH. In most additive manufacturing technologies typical variations in mechanical properties is observed in every axis, our investigation focuses on assessing the tensile properties of the material in all orientations. Tensile bars are fabricated accordingly and evaluated in terms of density and dimensions as both green and sintered components. Subsequent to the sintering process, an in-depth analysis of mechanical properties and microstructure is conducted to elucidate the inherent correlations between the technology and material.