Complexion-mediated martensitic phase transformation in Titanium
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Complexion-mediated.pdf
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6.03 MB
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Author(s)
Zhang, J.
Lai, M. J.
Dippel, A. -C.
Raabe, D.
Tasan, Cemal
Date Issued
February 2017
Journal
Nature Communications
Publisher
Nature Publishing Group
Citation
Zhang, J., C. C. Tasan, M. J. Lai, A. -C. Dippel, and D. Raabe. “Complexion-Mediated Martensitic Phase Transformation in Titanium.” Nature Communications 8 (February 1, 2017): 14210.
Version
Final published version
Abstract
The most efficient way to tune microstructures and mechanical properties of metallic alloys lies in designing and using athermal phase transformations. Examples are shape memory alloys and high strength steels, which together stand for 1,500 million tons annual production. In these materials, martensite formation and mechanical twinning are tuned via composition adjustment for realizing complex microstructures and beneficial mechanical properties. Here we report a new phase transformation that has the potential to widen the application window of Ti alloys, the most important structural material in aerospace design, by nanostructuring them via complexion-mediated transformation. This is a reversible martensitic transformation mechanism that leads to a final nanolaminate structure of α″ (orthorhombic) martensite bounded with planar complexions of athermal ω (a–ω, hexagonal). Both phases are crystallographically related to the parent β (BCC) matrix. As expected from a planar complexion, the a–ω is stable only at the hetero-interface.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1038/ncomms14210
