|About this Abstract
|Materials Science & Technology 2020
|Additive Manufacturing of Metals: Complex Microstructures and Architecture Design
|Alloy and Process Modification for Microstructure Control in Additively Manufactured Alloys
|Christian Leinenbach, Seth Griffiths, Anthony De Luca, Ariyan Arabi-Hashemi
|On-Site Speaker (Planned)
Up until now, most of AM-related research has been focused on the optimization of the process parameters with the goal to produce equiaxed and defect-free microstructures. Only recently, several re-searchers started to study how the microstructure in AM fabricated parts can be manipulated by modifying the composition of the alloys.
In this presentation, we will demonstrate how the combination of alloy and process modification can be used to manipulate the phase and microstructure formation and thus the properties of parts fabricated by laser powder bed fusion (LPBF). In particular, we will summarize the results of some ongoing projects at Empa such as the microstructure formation and manipulation during LPBF of a novel high-strength Al alloys, the site-specific control of microstructure and magnetic properties in a high-nitrogen stainless steel by in-situ alloy modification, or the mitigation of cracks in a Ni superalloy.