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Determining the orientation of parent β grain from one α variant in titanium alloys
Author(s) -
Zhao Z. B.,
Wang Q. J.,
Wang H.,
Liu J. R.,
Yang R.
Publication year - 2018
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576718008592
Subject(s) - lath , materials science , orientation (vector space) , electron backscatter diffraction , crystallography , titanium alloy , titanium , plane (geometry) , phase (matter) , alloy , morphology (biology) , microstructure , metallurgy , geometry , mathematics , martensite , chemistry , geology , paleontology , organic chemistry
The relationship between the crystallographic orientation and habit plane normal of transformed α laths in titanium alloys is discussed according to the Burgers orientation relationship and the three‐dimensional structure of the α lath. A new method (orientation–trace method) is developed to determine the orientation of the parent β phase using the orientation of the α lath, which was measured by electron backscatter diffraction, and the microstructural morphology of that α variant. This approach is validated in a near‐α titanium alloy. Moreover, the habit plane normal direction of the transformed α lath can be obtained from the crystallographic orientations of the α lath itself and its parent β grain. The verification and the corresponding discussion show the reliability of this approach.