Journal Article

PUBDB-2017-00839

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Complexion-mediated martensitic phase transformation in Titanium

Zhang, J. (Corresponding author) ; Tasan, C. C. (Corresponding author)Extern* ; Lai, M. J. ; Dippel, A.-C.DESY* ; Raabe, D. (Corresponding author)Extern*

2017
Nature Publishing Group London

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Please use a persistent id in citations: doi:10.1038/ncomms14210  doi:10.3204/PUBDB-2017-00839

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.

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Contributing Institute(s):

1. DOOR-User (DOOR)
2. Experimentebetreuung PETRA III (FS-PE)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)
2. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)

Experiment(s):

1. PETRA Beamline P02.1 (PETRA III)

Appears in the scientific report 2017

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