| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development III -- Super Materials and Extreme Environments
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| Presentation Title |
Synchrotron Imaging of the Influence of Oxidation with Powder Age on Cracking Phenomena during Laser Powder Bed Fusion of CM247 |
| Author(s) |
David T. Rees, Chu Lun Alex Leung, Gowtham Soundarapandiyan, Sebastian Marussi, Saurabh Shah, Robert Atwood, Ben Saunders, Gavin Baxter, Peter D. Lee |
| On-Site Speaker (Planned) |
David T. Rees |
| Abstract Scope |
Laser powder bed fusion (LBPF) of Ni-based superalloys provides a cost-effective method for the production and repair of low volume components that operate in high-temperature and high-stress environments. Precipitation hardened alloys such as CM247 are highly susceptible to cracking either during processing (hot-, liquation-, and ductility-dip cracking) or during heat-treatment; however, the underlying phenomena behind events causing cracking remains unclear. Both the complex thermal history of LPBF and feedstock composition plays key roles in crack susceptibility. Here, we investigate the effect of different levels of powder oxidation on CM247 powder during LPBF to identify a suitable trade-off between build quality and economic value. To observe crack evolution, we performed high-speed synchrotron X-ray imaging of the LPBF of CM247 powders over a range of processing parameters. Our results inform the extent to which aged powder may be reused, recycled, or scrapped due to high oxygen content. |
| Proceedings Inclusion? |
Planned: |