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Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron

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Atmosphere Effects in Laser Powder Bed Fusion: A Review.

Ben Brown¹, Cody Lough¹, Davis Wilson²

¹Materials Engineering, Department of Energy's Kansas City National Security Campus, Kansas City, MO 64147, USA.

Materials (Basel, Switzerland)

|November 27, 2024

Summary

This summary is machine-generated.

Controlling the atmosphere during laser powder bed fusion (LPBF) processing, similar to laser beam welding, can improve part quality. This review explores using atmosphere composition and pressure for advanced LPBF applications.

Keywords:

additive manufacturing cover gas laser powder bed fusion pressure

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Area of Science:

Materials Science and Engineering
Additive Manufacturing
Laser Processing

Background:

High-quality components from laser powder bed fusion (LPBF) depend on optimized processing parameters.
Established parameters (laser power, scan speed, layer thickness) suffice for basic geometries and materials.
Complex parts and novel materials necessitate exploring underutilized parameters like atmosphere control.

Purpose of the Study:

To review the current state of atmosphere control research in laser beam welding and LPBF.
To assess the potential of adapting laser beam welding atmosphere control strategies to LPBF.
To identify novel processing regimes enabled by atmosphere manipulation in LPBF.

Main Methods:

Literature review focusing on atmosphere composition and pressure in laser beam welding.
Analysis of existing studies on atmosphere control in laser-based additive manufacturing (AM).
Comparative assessment of laser beam welding and LPBF process similarities.

Main Results:

Atmosphere manipulation in laser beam welding expands processing windows and enhances weld quality.
Similarities between laser beam welding and LPBF suggest potential for cross-application of atmosphere control techniques.
Limited research exists on atmosphere control for LPBF, indicating a significant unexplored area.

Conclusions:

Adapting laser beam welding atmosphere control research to LPBF offers substantial potential for process innovation.
Further investigation into cover gas composition and pressure in LPBF is crucial.
Future LPBF systems could benefit from advanced atmosphere control for fabricating complex parts from diverse materials.