System and method for additive manufacturing process monitoring

Patent metadata

Field	Value
Publication number	US-11009863-B2
Application number	US-201816008621-A
Country	US
Kind code	B2
Filing date	Jun 14, 2018
Priority date	Jun 14, 2018
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

A computer-implemented method for predicting material properties in an Additive Manufacturing (AM) process is provided. The method comprises: receiving sensor data during the build of a metallic component using the AM process wherein the sensor data includes time-series temperature data of a surface of the metallic component recorded by a photodiode and time-series temperature data of a surface of the metallic component recorded by a pyrometer; receiving ICME (Integrated Computational Materials Engineering) model output data for building the component wherein the ICME model output data includes predicted melt pool dimensions time-series data, predicted melt temperature time-series data, and predicted defects forming as a result of melt pool evolution and movement; and estimating using the received sensor data and the received ICME model output data one or more material properties associated with the metallic component using a material property prediction module configured to predict one or more of the material properties.

First claim

What is claimed is:

1. A computer-implemented method for predicting material properties in an Additive Manufacturing (AM) process, the method comprising:
receiving sensor data during the build of a metallic component using the AM process;
receiving ICME (Integrated Computational Materials Engineering) model output data for building the component, the ICME model output data including predicted melt pool dimensions time-series data, predicted melt temperature time-series data, and predicted defects forming as a result of melt pool evolution and movement; and
estimating one or more of porosity size, porosity distribution, surface roughness, residual stresses, or strength of at least a portion of the metallic component using a Deep Neural Network (DNN) by applying the received sensor data and the received ICME model output data as inputs to the DNN, wherein the DNN is trained using sensor data from the build of a second component, ICME model output data for the build of the second component, and post-build inspection data of the second component to estimate the one or more of porosity size, porosity distribution, surface roughness, residual stresses, or strength of at least a portion of the metallic component.

2. The method of claim 1 , wherein the sensor data comprises two or more of time-series temperature data of a surface of the metallic component recorded by a photodiode, time-series temperature data of a surface of the metallic component recorded by a pyrometer, time-series laser power data, time-series build chamber oxygen data, time-series build chamber humidity data, and other time-series build chamber environmental data.

3. The method of claim 1 , further comprising training the DNN, wherein training the DNN comprises:
collecting training data comprising sensor data from the build of a second component, ICME model output data for the build of the second component, and post-build inspection data of the second component; and
computing and correcting a neural network model based on an error estimator metric to determine a final weight for each node in the neural network model.

4. The method of claim 1 , further comprising predicting an anomaly during the AM build process of the component using the DNN.

5. The method of claim 1 , wherein the estimating one or more of porosity size, porosity distribution, surface roughness, residual stresses, or strength of at least a portion of the metallic component comprises estimating the one or more of porosity size, porosity distribution, surface roughness, residual stresses, or strength of at least a portion of the metallic component using a plurality of DNNs wherein each DNN of the plurality of DNNs is configured to estimate using the received sensor data and the received ICME model output data a unique one of porosity size, porosity distribution, surface roughness, residual stresses, or strength of at least a portion of the metallic component.

6. The method of claim 1 , wherein the ICME model output data is predicted from an ICME model that includes as inputs laser power, laser speed, hatch spacing, and laser motion on top of a powder bed.

7. The method of claim 1 , further comprising predicting an anomaly during the AM build process of the component using an anomaly detection model that is configured to predict the anomaly based on a departure from nominal of the estimated one or more of porosity size, porosity distribution, surface roughness, residual stresses, or strength of at least a portion of the metallic component output from the DNN.

8. A computer-implemented system configured to predict material properties in an additive manufacturing (AM) process, the system comprising:
a photodiode configured to provide time-series temperature data of a surface of a metallic component during the build of the metallic component during the AM process;
a pyrometer configured to provide time-series temperature data of a surface of the metallic component during the build of the metallic component during the AM process;
an ICME (Integrated Computational Materials Engineering) module configured to predict ICME model output data for building the component, the ICME model output data including predicted melt pool dimensions time-series data, predicted melt temperature time-series data, and predicted defects forming as a result of melt pool evolution and movement; and
a Deep Neural Network (DNN) trained to estimate, in real-time, during the build of the metallic component, using the time-series temperature data from the photodiode, the time-series temperature data from the pyrometer, and the ICME model output data as inputs to the DNN, one or more of porosity size, porosity distribution, surface roughness, residual stresses, or strength of at least a portion of the metallic component.

9. The system of claim 8 , wherein the DNN is trained using sensor data from the build of a second component, ICME model output data for the build of the second component, and post-build inspection data of the second component to estimate the one or more of porosity size, porosity distribution, surface roughness, residual stresses, or strength of at least a portion of the metallic component.

10. The system of claim 8 , wherein the DNN is trained through computing and correcting a neural network model based on an error estimator metric to determine a final weight for each node in the neural network model.

11. The system of claim 8 , wherein the DNN is further trained to predict an anomaly during the AM build process of the component.

12. The system of claim 8 , comprising a plurality of Deep Neural Networks (DNNs) wherein each DNN of the plurality of DNNs is configured to estimate, using the time-series temperature data from the photodiode, the time-series temperature data from the pyrometer, and the ICME model output data, a unique one of porosity size, porosity distribution, surface roughness, residual stresses, or strength of at least a portion of the metallic component.

13. The system of claim 8 , wherein the ICME module is configured to predict the ICME model output data from inputs comprising laser power, laser speed, hatch spacing, and laser motion on top of a powder bed.

14. The system of claim 8 , further comprising an anomaly detection model configured to predict an anomaly during the AM build process of the component based on a departure from nominal of the estimated one or more of porosity size, porosity distribution, surface roughness, residual stresses, or strength of at least a portion of the metallic component output from the DNN.

15. A material property prediction module configured to predict material properties in an Additive Manufacturing (AM) process, the material property prediction module comprising one or more processors configured by programming instructions in computer readable media, the material property prediction module configured to:
receive sensor data during the build of a metallic component using the AM process, the sensor data including two or more of time-series temperature data of a surface of the metallic component recorded by a photodiode, time-series temperature data of a surface of the metallic component recorded by a pyrometer, time-series laser power data, time-series build chamber oxygen data, time-series build chamber humidity data, and other time-series build chamber environmental data;
receive ICME (Integrated Computational Materials Engineering) model output data for building the component, the ICME model output data including predicted melt pool dimensions time-series data, predicted melt temperature time-series data, and predicted defects forming as a result of melt po

Assignees

• Honeywell Int Inc

Inventors

• Bharadwaj Raj Mohan
• Vechart Andrew Peter
• Sundarraj Suresh
• Ranade Piyush

Classifications

• G05B23/0281 Primary

  Quantitative, e.g. mathematical distance; Clustering; Neural networks; Statistical analysis · CPC title

• G05B19/4099 Primary

  Surface or curve machining, making three-dimensional [3D] objects, e.g. desktop manufacturing · CPC title

• B22F12/90

  Means for process control, e.g. cameras or sensors · CPC title

• B22F10/85

  for controlling or regulating additive manufacturing processes · CPC title

• B22F10/38

  to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures · CPC title