Impact of Substrate Preheating Temperature on Laser Powder Bed Fusion Al-Si Alloy

Strategic Insights -

Recent research by a team of scientists at the University of Science and Technology Beijing has shed light on the influence of substrate preheating temperature on the microstructure and mechanical properties of laser powder bed fusion Al-Si alloy. The study aimed to investigate the effects of preheating temperatures on the formability and microstructure of the material, with a focus on the optimal process parameter range for achieving densification with lower energy input. The research found that 200 degrees C substrate preheating can alter the optimal process parameter range, but also leads to a coarser microstructure.

Key Takeaways:

  • The study investigated the influence of substrate preheating temperature on the microstructure and mechanical properties of LPBF Al-Si alloy, with a focus on the optimal process parameter range for achieving densification with lower energy input.
  • The research found that 200 degrees C substrate preheating can alter the optimal process parameter range, allowing the material to achieve densification with lower energy input.
  • However, substrate preheating concurrently leads to a coarser microstructure, particularly regarding the cellular structure and nano-Si precipitation.
  • The study conducted an in-depth analysis of the phenomenon through Flow 3D simulation and relevant theoretical formulations.
  • The research emphasizes the role of substrate preheating on LPBF Al-Si alloy and provides data support for practical production.
  • The study was peer-reviewed and the research was funded by the National Natural Science Foundation of China (NSFC) and the Fundamental Research Funds for the Central Universities.

Statistics:

  • The study investigated the effects of preheating temperatures of 50 degrees C and 200 degrees C on the microstructure and mechanical properties of LPBF Al-Si alloy.
  • The research found that 200 degrees C substrate preheating can lead to a coarser microstructure, particularly regarding the cellular structure and nano-Si precipitation.
  • The study concluded that this work emphasizes the role of substrate preheating on LPBF Al-Si alloy and provides data support for practical production.

Sources:

  • Effect of Substrate Preheating Temperature On the Microstructure and Mechanical Properties of Laser Powder Bed Fusion Alsi12 Alloy. Materials Characterization, 2025;229.
  • NewsRx. Findings from University of Science and Technology Beijing Broaden Understanding of Nanotechnology (Effect of Substrate Preheating Temperature On the Microstructure and Mechanical Properties of Laser Powder Bed Fusion Alsi12 Alloy). Nanotechnology Weekly. November 3, 2025; p 385.