| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing of Metals: Complex Microstructures and Architecture Design
|
| Presentation Title |
Modeling of Grain Growth in Metal Printing |
| Author(s) |
Tarasankar DebRoy, Tuhin Mukherjee |
| On-Site Speaker (Planned) |
Tarasankar DebRoy |
| Abstract Scope |
Prediction of grain growth and solidification morphology is important since they affect the mechanical properties of printed metal parts. Here we combine a well-tested 3D heat transfer and fluid flow model with a Monte Carlo method based grain growth model to predict three-dimensional grain structure, texture, columnar to equiaxed transition, and solid-state grain growth during directed energy deposition of nickel alloys. The effects of multiple thermal cycles during the deposition process on the solid-state grain growth are examined through modeling. We explain the origin of spatial non-uniformity of microstructure based on the transient temperature field and molten pool geometry. We also show how modeling can help to predict appropriate processing conditions to achieve customized texture and columnar to equiaxed transition to prevent solidification cracking. |