Evaluation of microstructural development in electron beam melted Ti-6Al-4V

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Evaluation of microstructural development in electron beam melted Ti-6Al-4V

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Publication Article, peer reviewed scientific
Title Evaluation of microstructural development in electron beam melted Ti-6Al-4V
Author Safdar, Adnan ; Wei, Liu-Ying ; Snis, Anders ; Lai, Zhonge
Date 2012
English abstract
In the current work an investigation of the microstructures of EBM built Ti-6Al-4V test bars has been performed using OM, SEM, TEM and XRD. It has been found that the prior β phase, that formed during the initial solidification, possesses a column shaped morphology with growing direction parallel to built direction. Typical (α+β) structures namely Widmanstätten α platelets with rod-like β phase formed on the interfaces of the fine α grains, have been observed in the columnar prior β grains. Grain boundary α phase was found to be formed around the boundaries of the columnar prior β grains. Different phases present in the parts, especially the BCC β phases have been characterized. The TEM/EDX results indicate very high V composition in the β phase. Results of TEM/SAED and XRD also revealed that a superlattice structure could be present in the β phase. Phase transformation sequence is discussed according to the processing history and the microstructures observed.
DOI http://dx.doi.org/10.1016/j.matchar.2011.12.008 (link to publisher's fulltext)
Publisher Elsevier
Host/Issue Materials Charecterization;
Volume 65
ISSN 1044-5803
Pages 8-15
Language eng (iso)
Subject Ti-6Al-4V
EBM
Microstructures
SEM
TEM
XRD
Technology
Research Subject Categories::TECHNOLOGY
Handle http://hdl.handle.net/2043/13321 Permalink to this page
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