| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Advanced Characterization for Industrial Applications
|
| Presentation Title |
Synchrotron Characterization of Hot Cracking and Related Topics |
| Author(s) |
Anthony D. Rollett, Guannan Tang, Nadia Kouraytem, Benjamin Gould, Joseph Pauza, Ziheng Wu, Joseph Aroh, Runbo Jiang, Seunghee Oh, Srujana Yarasi, Ann Choi, Amit Verma, Rajib Halder, Andrew Huck, Zhening Yang, Amaranth Karra |
| On-Site Speaker (Planned) |
Anthony D. Rollett |
| Abstract Scope |
Hot Cracking is a challenge for the use of many alloys, especially with respect to additive manufacturing (AM). Notwithstanding the extensive literature on the topic, we lack a criterion for susceptibility to hot cracking. We have used high-speed visualization with high energy x-rays to quantify the phenomenon in different Al and Ni-based alloys, supplemented by ex situ microscopy and cross-sections. We report on comparisons between the synchrotron-based characterization and the various methods used in the literature, as well as a heuristic approach to correlating susceptibility to hot cracking to various material properties. Preliminary results suggest that freezing range by itself is a poor predictor, for example. Additionally, we review progress in: automating the analysis of keyhole behavior; occurrence of stray grains (new orientations) in AM; orientation gradients in AM metals; microstructures in 3D printed heat exchangers; solid state transformation in AM; microstructures in laser-DED Ti-6Al-4V. |