Wang, L., Guo, Z., Peng, G., Wu, S., Zhang, Y., & Yan, W. (2024). Evaporation‐Induced Composition Evolution in Metal Additive Manufacturing. Advanced Functional Materials, 35(7). Portico. https://doi.org/10.1002/adfm.202412071
Abstract:
AbstractIn fusion‐based metal additive manufacturing (MAM), the high‐intensity energy input leads to serious evaporation, but how evaporation induces composition evolution and variation and further impacts microstructure and mechanical properties remain a knowledge gap. Here a model integrating composition evolution with molten pool dynamics is developed to reproduce temperature‐ and composition‐dependent evaporative losses and subsequent transport during laser melting. Together with comprehensive experimental characterizations and tests, the simulation results illustrate varying evaporation rates of different elements altering compositions, resulting in a 3D cirrus‐shaped concentration distribution, which significantly impacts the mechanical properties. The simulations reproduce the detailed composition evolution from surface evaporation to molten pool transport and reveal underlying mechanisms relating the composition, temperature, fluid flow, and cracking, which is challenging to observe experimentally. This study elucidates the critical role of evaporation‐induced composition evolution in determining microstructure and mechanical properties. In future alloy design for MAM, integrating initial composition and manufacturing parameters is imperative, where composition evolution simulation offers valuable guidance.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the ASTAR - Manufacturing, Trade, and Connectivity Programmatic Fund
Grant Reference no. : M22L2b0111
This research / project is supported by the Ministry of Education - Academic Research Fund Tier 2
Grant Reference no. : MOE-T2EP50221-0013
Description:
This is the peer reviewed version of the following article: Wang, L., Guo, Z., Peng, G., Wu, S., Zhang, Y., & Yan, W. (2024). Evaporation‐Induced Composition Evolution in Metal Additive Manufacturing. Advanced Functional Materials, 35(7). Portico. https://doi.org/10.1002/adfm.202412071
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