Additive manufacturing of CuCr1Zr by development of a gas atomization and laser powder bed fusion routine

The research focuses on alloy design, powder production, and laser powder bed fusion (LPBF) of copper alloys. Copper and its alloys play a fundamental role for modern industrial applications due to their excellent thermal and electric conductivity in conjunction with considerable mechanical strength...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2020-03, Vol.107 (5-6), p.2151-2161
Main Authors: Jahns, Katrin, Bappert, Robin, Böhlke, Peter, Krupp, Ulrich
Format: Article
Language:English
Subjects:
Additive manufacturing
Alloy development
Alloy systems
Alloying
Alloys
Atomizing
CAE) and Design
Cast copper alloys
Computer-Aided Engineering (CAD
Copper
Copper base alloys
Electrical resistivity
Engineering
Gas atomization
Industrial and Production Engineering
Industrial applications
Laser beam welding
Mechanical Engineering
Media Management
Nozzles
Optimization
Original Article
Powder beds
Precipitation hardening
Welding electrodes
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Summary:The research focuses on alloy design, powder production, and laser powder bed fusion (LPBF) of copper alloys. Copper and its alloys play a fundamental role for modern industrial applications due to their excellent thermal and electric conductivity in conjunction with considerable mechanical strength, for example, as welding electrodes and nozzles. By precipitation hardening, the hardness of low-alloyed copper, like CuCr1Zr, can be increased significantly. A combination of the geometry freedom of additive manufacturing with a tailor-made alloy design during powder production offers the opportunity to develop new alloy systems with a focus on the respective application. Experimental results regarding gas atomization, LPBF, property investigations, and property optimization of CuCr1Zr are presented. Powder particles and LPBF parts were analyzed with respect to phase and precipitate formation and compared to benchmark experiments of conventionally cast copper alloys. The microstructure differs significantly. Furthermore, the relative density of the LPBF parts reaches a value of 99.8%.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-020-04941-7