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This study aims to develop an in-process curing method to reduce production time for binder jettingBinder Jetting (BJ) printed parts. A finite element methodFinite Element Methods (FEM) model was developed to simulate thermal behavior of loose powder and binder-powder mixture during in-process curing. The heat source was represented by a 2D Gaussian heat input moving over the powder bed before and after the application of the binder to each layer of powder. The deposition of powder layers was simulated using the element birth and death technique. The initial 20 layers of printing were analyzed in two distinct regions: one within the printed specimen and the other in the surrounding loose metal powder. A thermal camera was used to record the powder bed's temperatureTemperature after each deposited layer for model validation. Both the simulationSimulation and experimental results showed similar trend with an average temperatureTemperature error of 3 °C in the printed part and 2.6 °C in the loose metal powder. However, the complexity of the current model makes it computationally expensive to simulate the BJ process for a full-scale part. It required approximately 22 h to simulate the first 20 layers of the process using 8 processors.

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A Layer-By-Layer FEM Curing Model for Binder Jetting of 316L

  • 会议论文

  • 发表日期：

    2025年

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  • Leon Desgagnes,
  • Reza Tangestani,
  • Hongyan Miao,
  • Arunkumar Natarajan,
  • Ruediger Rudloff,
  • Srinivas Pendurti,
  • Elie Bitar-Nehme,
  • Etienne Martin

摘要

This study aims to develop an in-process curing method to reduce production time for binder jettingBinder Jetting (BJ) printed parts. A finite element methodFinite Element Methods (FEM) model was developed to simulate thermal behavior of loose powder and binder-powder mixture during in-process curing. The heat source was represented by a 2D Gaussian heat input moving over the powder bed before and after the application of the binder to each layer of powder. The deposition of powder layers was simulated using the element birth and death technique. The initial 20 layers of printing were analyzed in two distinct regions: one within the printed specimen and the other in the surrounding loose metal powder. A thermal camera was used to record the powder bed's temperatureTemperature after each deposited layer for model validation. Both the simulationSimulation and experimental results showed similar trend with an average temperatureTemperature error of 3 °C in the printed part and 2.6 °C in the loose metal powder. However, the complexity of the current model makes it computationally expensive to simulate the BJ process for a full-scale part. It required approximately 22 h to simulate the first 20 layers of the process using 8 processors.