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Mapping deformation mechanisms in lamellar titanium aluminide
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics. Chinese Academy of Sciences, China.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
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2018 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 144, p. 835-843Article in journal (Refereed) Published
Abstract [en]

Breakdown of Schmid's law is a long-standing problem for exploring the orientation-dependent deformation mechanism in intermetallics. The lack of atomic-level understanding of the selection rules for the plastic deformation modes has seriously limited designing strong and ductile intermetallics for high-temperature applications. Here we put forward a transparent model solely based on first principles simulations for mapping the deformation modes in gamma-TiAl polysynthetic twinned alloys. The model bridges intrinsic energy barriers and different deformation mechanisms and beautifully resolves the complexity of the observed orientation-dependent deformation mechanisms. Using the model, one can elegantly reveal the atomic-level mechanisms behind the unique channeled flow phenomenon in lamellar TiAl alloys.

Place, publisher, year, edition, pages
Acta Materialia , 2018. Vol. 144, p. 835-843
Keywords [en]
Stacking fault, Twinning, Slip, First principles
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-223515DOI: 10.1016/j.actamat.2017.11.028ISI: 000424067100076Scopus ID: 2-s2.0-85036479997OAI: oai:DiVA.org:kth-223515DiVA, id: diva2:1185074
Funder
Swedish Research CouncilSwedish Foundation for Strategic Research Carl Tryggers foundation VINNOVA
Note

QC 20180223

Available from: 2018-02-23 Created: 2018-02-23 Last updated: 2018-02-23Bibliographically approved

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Ji, Zong-WeiLu, SongKim, Dongyoo

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  • apa
  • harvard1
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  • de-DE
  • en-GB
  • en-US
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Output format
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