| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defects and Properties of Cast Metals
|
| Presentation Title |
Coupling Hot-tearing of High γ’ Nickel Alloys to Processing Parameters Through Classic Solidification Criteria |
| Author(s) |
Kevin Chaput, Matthew Krug, Edwin Schwalbach |
| On-Site Speaker (Planned) |
Matthew Krug |
| Abstract Scope |
One of the primary limitations in wider adoption of laser powder bed fusion (LPBF) technology is formation of hot-tears characteristically observed in high strength aluminum and high γ’ nickel alloys, key engineering alloys for aerospace applications. Fortunately, with an understanding of the appropriate boundary conditions of the process, there exists decades of welding and solidification theory that can be leveraged to address these defects. This body of work focuses on understanding the hot-tearing mechanism observed in CM 247LC fabricated by LPBF and the applicability of hot-tearing criteria derived for castings and welds. Leveraging a fast-acting thermal model, this work couples process conditions (power, velocity, hatch spacing, etc.) to key solidification parameters (thermal gradient, isotherm velocity) with coupled experimental results for validation. This methodology will be used to develop and demonstrate a strategy to control the formation of these defects while delivering a dense component. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |