Variant selection and intervariant crystallographic planes distribution in martensite in a Ti-6Al-4V alloy

Beladi, Hossein, Chao, Qi and Rohrer, Gregory S. 2014, Variant selection and intervariant crystallographic planes distribution in martensite in a Ti-6Al-4V alloy, Acta Materialia, vol. 80, pp. 478-489, doi: 10.1016/j.actamat.2014.06.064.

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Title Variant selection and intervariant crystallographic planes distribution in martensite in a Ti-6Al-4V alloy
Author(s) Beladi, HosseinORCID iD for Beladi, Hossein orcid.org/0000-0003-0131-707X
Chao, Qi
Rohrer, Gregory S.
Journal name Acta Materialia
Volume number 80
Start page 478
End page 489
Total pages 12
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2014
ISSN 1359-6454
Keyword(s) Ti-6Al-4V
martensite
texture
intervariant plane distribution
variant selection
electron backscatter diffraction
Summary The transformation texture was studied in a Ti-6Al-4V alloy for two microstructures produced through different phase transformation mechanisms (i.e. diffusional vs. displacive). Both microstructures revealed qualitatively similar crystallographic texture characteristics, having two main texture components with Euler angles of (90°, 90°, 0°) and (90°, 30°, 0°). However, the overall α texture strength was considerably weaker in the martensitic structure (i.e. displacive mechanism) compared with the α + β microstructure produced through slow cooling (i.e. diffusional mechanism). The intervariant boundary distribution in martensite mostly revealed five misorientations associated with the Burgers orientation relationship. The five-parameter boundary analysis also showed a very strong interface plane orientation texture, with interfaces terminated mostly on the prismatic planes {hki0}, when misorientation was ignored. The highest intervariant boundary populations belonged to the 63.26°/[10 553 ] and 60°/[112 0] misorientations, with length fractions of 0.38 and 0.3, respectively. The former was terminated on (41 3 0), and the latter was a symmetric tilt boundary, terminated on (1 011). The intervariant plane distribution in martensite was determined more by the constraints of the phase transformation than by the relative interface energies.
Language eng
DOI 10.1016/j.actamat.2014.06.064
Field of Research 091299 Materials Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Acta Materialia
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070097

Document type: Journal Article
Collection: Institute for Frontier Materials
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