Relevance and Application of Oxygen and Hydrogen Determination in Additive Manufacturing and Powder Recycling
In powder bed based additive manufacturing the chemical reactions on the surface of metal powder particles play an important role.They can be influenced during the powder production,storage,handling and during the processing via additive manufacturing.Aging due to warehousing or powder recycling can be a thread to part quality.A lack of knowledge currently prevails regarding the magnitude and variance of initial oxygen,nitrogen and hydrogen contents of commercially available powders for powder bed fusion processes.Inert Gas Fusion Analysis was used to characterize the typical initial oxygen and hydrogen content of various commercially available metal powders(AlSi10Mg,Ti6Al4V,Inconel,etc.).The reaction with moisture was studied on AlSi10Mg powder and the formation of aluminum hydroxides proven,resulting in an increase of the oxide layer thickness.Logical relations between particle size and surface oxidation have been verified.Different effects like the adsorption of moisture,reaction with oxygen and water as well as spatter formation during a SLM process influence powder aging,final product quality and costs of the entire process.Inert gas fusion with mass spectrometer coupling was found to be a suitable method for quality control of argon in feedstock powders and final parts.The results obtained indicate that inert gas fusion(IGF)is considered as a fast and precise method to monitor oxygen,hydrogen content along the process chain and for additive manufacturing and powder recycling.
Oxygen analysis Hydrogen analysis Argon analysis Powder Recycling Process gas inclusions Powder aging
Paplewski Peter Zühlke Christian Lutter-Günther Max
Bruker AXS GmbH,BU: Elemental Analysis,(O)stliche Rheinbrückenstraβe 49,76187 Karlsruhe,Germany Fraunhofer Research Institution for Casting,Composite and Processing Technology: IGCV,Beim Glaspalas
国际会议
北京
英文
1729-1733
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）