Influence of Heat Treatment on the Microstructure and Mechanical Properties of Pure Copper Components Fabricated via Micro-Laser Powder Bed Fusion
2024
Effects of Heat Treatment on Pure Copper Properties
publication
Evidence: moderate
Author Information
Author(s): Qu Shuo, Wang Liqiang, Ding Junhao, Lu Yang, Song Xu
Primary Institution: The Chinese University of Hong Kong
Hypothesis
How does heat treatment affect the microstructure and mechanical properties of pure copper components fabricated via micro-laser powder bed fusion?
Conclusion
Heat treatment improves the mechanical properties of pure copper by reducing anisotropy and increasing thermal stability.
Supporting Evidence
- Heat treatment increases the average grain size of pure copper from ~8 to 18 μm.
- The molten pool boundaries disappear under 900 °C heat treatment.
- The yield strength difference between samples decreases from ~30 MPa to ~4 MPa with increased heat treatment temperature.
- At 300 °C, the sample exhibits significantly higher elongation (80%) than at room temperature (25%).
- The high-density grain boundaries contribute to better thermal stability compared to conventional pure copper.
Takeaway
This study shows that heating pure copper can make it stronger and more flexible, which is good for making things like electronics.
Methodology
Pure copper samples were fabricated using micro-laser powder bed fusion and subjected to various heat treatments to analyze their microstructure and mechanical properties.
Digital Object Identifier (DOI)
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