Impact of laser irradiation on microstructure and phase development of tungsten carbide - cobalt
| Autor: | Martin Reuber, Joachim Gussone, Tobias Schwanekamp |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Materials science Metastable Phase chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Tungsten 01 natural sciences Laser Melting law.invention Tungsten Carbide-Cobalt chemistry.chemical_compound 020901 industrial engineering & automation WC-Co Tungsten carbide law Phase (matter) L-PBF Laser Powder Bed Fusion Irradiation Composite material 0105 earth and related environmental sciences General Environmental Science Cemented Carbides Non-Equilibrium Phase Microstructure Laser Grain growth chemistry Metallische Strukturen und hybride Werkstoffsysteme General Earth and Planetary Sciences Cobalt |
| Zdroj: | Procedia CIRP. 94:239-242 |
| ISSN: | 2212-8271 |
| DOI: | 10.1016/j.procir.2020.09.045 |
| Popis: | Previous studies on Laser Powder Bed Fusion of tungsten carbide-cobalt (WC-Co) revealed several defects in the laser molten microstructures. To analyze the defect formation mechanisms and the fundamental impact of laser energy input on phase development and microstructure of WC- Co, single-pulse and single-track analogy experiments are conducted. Conventional WC-Co is used as substrate. Variations in cobalt content and processing conditions are investigated. It is found that a single laser exposure can be enough to induce decomposition of microstructure, WC grain growth, formation of non-equilibrium phases and thermal cracking. Based on the results, defect formation mechanisms and countermeasures are discussed. |
| Databáze: | OpenAIRE |
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