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Comprehensive Analysis of Two H13-Type Starting Materials Used for Laser Cladding and Aerosol Particles Formed in
László Péter1, János Osán2, Szilvia Kugler2
1Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary.
Materials (Basel, Switzerland)
|October 27, 2022
Summary
Investigating laser cladding aerosols revealed ultrafine particles are oxidized from evaporation, while larger particles are powder residues. Material transformations depend on particle size during H13 steel processing.
Area of Science:
- Materials Science
- Aerosol Science
- Surface Engineering
Background:
- Laser cladding is an additive manufacturing process using metal powders.
- Understanding material transformations in emitted aerosols is crucial for process control and safety.
Purpose of the Study:
- To characterize the material transformations of aerosol particles generated during H13 steel laser cladding.
- To correlate particle size with composition and oxidation state.
Main Methods:
- Collected aerosol particles using a cascade impactor.
- Measured particle size via scanning mobility particle spectrometer and aerodynamic particle sizer.
- Analyzed particle composition and oxidation states using SEM-EDX, TXRF, and XANES spectroscopy.
Main Results:
- Ultrafine particles (<100 nm) were predominantly oxidized, formed via evaporation-oxidation-condensation.
- Larger particles (>200 nm) were mainly residues of the original H13 steel powder with altered composition.
- Concentration ratios of components varied with particle size and were explained by transformation processes.
Conclusions:
- Particle formation mechanisms differ significantly between ultrafine and larger aerosol fractions.
- Oxidation and composition changes are size-dependent during H13 steel laser cladding.
- Detailed analysis provides insights into aerosol generation and material behavior in laser cladding.
