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Additive manufacturing of metal components is commonly performed by laser or electron beam melting for direct consolidation of powders, but there are also other techniques available, e.g. the ink-jet on powder bed used by Digital Metal ® . Höganäs Digital Metal has been involved in additive manufacturing since 2010, with a technology that utilizes separate forming and consolidation processes. Precision inkjet on powder bed is used for production of green components, and these components are then sintered to obtain final density and strength. The technique is successfully used to produce components in 316L stainless steel, but basically all types of metals or alloys, available as powders with suitable morphology and particle size can be used to print components. The following sintering process then can be optimized for each individual alloy, making processing of a wide selection of alloys possible. In this study, possibilities and challenges with different alloys are discussed.

Powder metallurgy (PM) is an attractive technology for manufacturing net-shape titanium-based components. However, it is challenging to make PM titanium products competitive in terms of mechanical properties. This article gives an overview of the current challenges in PM titanium and the best strategies to overcome them by alloying. By adding suitable alloying elements the properties of PM titanium components can be enhanced. The use of sintering aids helps to control the typical residual porosity of PM titanium alloys. Furthermore, controlling microstructure by alloying offers the possibility to go for high performance applications. Moreover, ductility is improved by adding elements that scavenge oxygen. A favorable selection of alloying elements offers a practical and competitive approach to meet the mechanical requirements in future PM titanium applications.

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