| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals:
ICME Gaps: Material Property and Validation Data to Support Certification
|
| Presentation Title |
Lessons Learned from Calibration and Validation of Process Models for Laser Powder Bed Fusion |
| Author(s) |
Albert To, Florian Dugast, Seth Strayer, Wen Dong, Xuan Liang, Qian Chen, Hai Tran, Shawn Hinnebusch, Xavier Jimenez |
| On-Site Speaker (Planned) |
Albert To |
| Abstract Scope |
This talk presents several lessons learned from calibration and validation of process modeling for laser powder bed fusion (L-PBF) including both thermal, thermomechanical, and inherent strain models. First, the validity of using in-situ thermocouple and ex-situ optical microscopy measurement to calibrate thermal process modeling at both the mesoscale (scan-wise) and part scale will be discussed. The need for high temperature material properties in the process simulation model will also be highlighted. Second, we will examine the validity of using double cantilever structure and X-ray diffraction experiments to validate residual stress predicted by process simulation. Third, we will discuss the difficulty in conducting testing to directly obtain as-built fracture toughness of L-PBF material and propose an integrated simulation and modeling approach to overcome this difficulty. |