Abstract

Electron backscattered diffraction (EBSD) has been conducted to determine the orientation relationship of the remnant B2 phase in an α-solidified γ-Ti-45Al-2Nb-0.3Si (at. %) based intermetallic alloy. The morphology and microstructural characterisation was investigated using conventional methods. The results showed that the B2-grains exhibits a Blackburn orientation relationship (BOR) with the α2 grains viz. {111}B2 // {0001}α2 and {110}B2 // {11-20}α2. Moreover, mis-orientation axes of B2-grains were found in the clusters between <101> and <111> in 57-63° angles, in the Y0 directions. In addition, it was also observed that the overall B2 grains in the alloy structure was textured and comprised of high angle boundaries of misorientations above 15° angles.

Details

Title
EBSD characterisation of the B2 orientation in γ-TiAl based alloy
Author
Mathabathe, M N 1 ; Bolokang, A S 2 ; Govender, G 2 ; Siyasiya, C W 3 ; Mostert, R J 3 

 Council of Scientific Industrial Research, Material Science and Manufacturing, Light Metals, Meiring Naude Road, P O Box 395, Pretoria, South Africa; Department of Material Science and Metallurgical Engineering, Faculty of Engineering, Built Environment and Information Technology, University of Pretoria, South Africa 
 Council of Scientific Industrial Research, Material Science and Manufacturing, Light Metals, Meiring Naude Road, P O Box 395, Pretoria, South Africa 
 Department of Material Science and Metallurgical Engineering, Faculty of Engineering, Built Environment and Information Technology, University of Pretoria, South Africa 
Publication year
2019
Publication date
Oct 2019
Publisher
IOP Publishing
ISSN
17578981
e-ISSN
1757899X
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2561345664
Copyright
© 2019. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.