| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
A Rapid Screening Benchmark Test Methodology for Accelerated AM Alloy Design |
| Author(s) |
Ralph E. Napolitano, Timothy Prost, Shubhra Jain, Emma White, Iver Anderson |
| On-Site Speaker (Planned) |
Ralph E. Napolitano |
| Abstract Scope |
A critical issue limiting widespread AM implementation of high-performance alloys is the phenomenon of cracking during localized repetitive melting and freezing. In-build cracking in AM processes may be attributed to solidification hot-cracking, liquation cracking, transformation-induced cracking, or simply to thermal stress induced cracking. The associated poor “buildability” restricts the use of established engineering alloys and presents a challenge in the development of new alloys. Accelerated alloy/process design practices require efficient test methods for reproducible benchmarking of hot cracking susceptibility, correlation with predictive cracking criteria, and efficient comparison of new alloys. Here, we examine the utility of a spot-melting cantilever bend test method for rapid screening and assessment of hot-cracking susceptibility in localized melting AM processes. Test results are compared with established solidification-path-based hot cracking predictors computed for several Al-, Ni-, and Fe-based alloys. (Supported by Iowa State internal grant, with collaborative support from Ames Laboratory DE-AC02-07CH11358.765, U.S. DOE-EERE-Advanced Manufacturing.) |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |