The three-dimensional morphology of growing dendrites
The processes controlling the morphology of dendrites have been of great interest to a wide range of communities, since they are examples of an out-of-equilibrium pattern forming system, there is a clear connection with battery failure processes, and their morphology sets the properties of many metallic alloys. We determine the three-dimensional morphology of free growing metallic dendrites using a novel X-ray tomographic technique that improves the temporal resolution by more than an order of magnitude compared to conventional techniques. These measurements show that the growth morphology of metallic dendrites is surprisingly different from that seen in model systems, the morphology is not self-similar with distance back from the tip, and that this morphology can have an unexpectedly strong influence on solute segregation in castings. These experiments also provide benchmark data that can be used to validate simulations of free dendritic growth.
- Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering.
- Purdue Univ., West Lafayette, IN (United States). Dept. of Electrical and Computer Engineering.
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Carnegie Mellon University, Pittsburgh, PA (United States). Dept. of Materials Science and Engineering.
- Publication Date:
- OSTI Identifier:
- Grant/Contract Number:
- AC02-06CH11357; FC52-08NA28752
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: C; Journal ID: ISSN 2045-2322
- Nature Publishing Group
- Research Org:
- Northwestern Univ., Evanston, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org:
- USDOE Office of Science (SC)
- Country of Publication:
- United States
- 36 MATERIALS SCIENCE imaging techniques; phase transitions and critical phenomena