Journal article
Probing rapid solidification pathways in refractory complex concentrated alloys via multimodal synchrotron X-ray imaging and melt pool-scale simulation
Journal of materials research
02 Nov 2024
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Abstract Refractory complex concentrated alloys (RCCAs) show potential as the next-generation structural materials due to their superior strength in extreme environments. However, RCCAs processed by metal additive manufacturing (AM) typically suffer from process-related challenges surrounding laser material interaction defects and microstructure control. Multimodal in situ techniques (synchrotron X-ray imaging and diffraction and infrared imaging) and melt pool-level simulations were employed to understand rapid solidification pathways in two representative RCCAs: (i) multi-phase BCC + HCP Ti 0.4 Zr 0.4 Nb 0.1 Ta 0.1 and (ii) single-phase BCC Ti 0.486 V 0.375 Cr 0.111 Ta 0.028 . As expected, laser material interaction defects followed similar systematic trends in process parameter space for both alloys. Additionally, both alloys formed a single-phase (BCC) microstructure after rapid solidification processing. However, significant differences in microstructure selection between these alloys were discovered, where Ti 0.4 Zr 0.4 Nb 0.1 Ta 0.1 showed a mixture of equiaxed and columnar grains, while Ti 0.486 V 0.375 Cr 0.111 Ta 0.028 was dominated by columnar growth. These behaviors were well described by the influence of undercooling effects on columnar-to-equiaxed transition (CET). Distinct microstructure formation in each alloy was verified through CET predictions via analytical melt pool simulations, which showed a ~ 5 × increase degrees in undercooling for Ti 0.4 Zr 0.4 Nb 0.1 Ta 0.1 compared to Ti 0.486 V 0.375 Cr 0.111 Ta 0.028 . Overall, these results show that microstructure control based on modulating the freezing range must be balanced with process considerations which resist defect formation, such as solidification crack formation in RCCAs. Graphical abstract
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Details
- Title
- Probing rapid solidification pathways in refractory complex concentrated alloys via multimodal synchrotron X-ray imaging and melt pool-scale simulation
- Creators
- Dillon K. JobesYuanren LiuLucero LopezSeunghee OhAshley BucsekDaniel Rubio-EjchelChristopher TandocYong-Jie HuJerard V. Gordon
- Publication Details
- Journal of materials research
- Publisher
- SPRINGER HEIDELBERG; HEIDELBERG
- Number of pages
- 17
- Grant note
- NSF: DMR-2316762 U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory: DE-AC02-06CH11357
This work was partially supported by NSF DMR-2316762 as well as the startup fund from Drexel University. This research used resources of the Advanced Photon Source; a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001346911000002
- Scopus ID
- 2-s2.0-85208101873
- Other Identifier
- 991021958015704721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary