A yttrium-containing high-temperature titanium alloy additively manufactured by selective electron beam melting

Lu, Sheng-Lu, Tang, Hui-Ping, Qian, M., Hong, Quan, Zeng, Li-Ying and StJohn, D. H. (2015) A yttrium-containing high-temperature titanium alloy additively manufactured by selective electron beam melting. Journal of Central South University, 22 8: 2857-2863. doi:10.1007/s11771-015-2818-x


Author Lu, Sheng-Lu
Tang, Hui-Ping
Qian, M.
Hong, Quan
Zeng, Li-Ying
StJohn, D. H.
Title A yttrium-containing high-temperature titanium alloy additively manufactured by selective electron beam melting
Journal name Journal of Central South University   Check publisher's open access policy
ISSN 2227-5223
2095-2899
Publication date 2015-08
Sub-type Article (original research)
DOI 10.1007/s11771-015-2818-x
Open Access Status Not Open Access
Volume 22
Issue 8
Start page 2857
End page 2863
Total pages 7
Place of publication Changsha, China
Publisher Zhongnan Daxue / Central South University
Collection year 2016
Language eng
Formatted abstract
A yttrium-containing high-temperature titanium alloy (Ti-6Al-2.7Sn-4Zr-0.4Mo-0.45Si-0.1Y, mass fraction, %) has been additively manufactured using selective electron beam melting (SEBM). The resulting microstructure and textures were studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and electron backscattered diffraction (EBSD) and compared with the conventionally manufactured form. A notable distinct difference of microstructures is that additive manufacturing by SEBM enables homogeneous precipitation of fine Y2O3 dispersoids in the size range of 50-250 nm throughout the as-fabricated alloy, despite the presence of just trace levels of oxygen (7×10-4, mass fraction) and yttrium (10-3, mass fraction) in the alloy. In contrast, the conventionally manufactured alloy shows inhomogeneously distributed coarse Y2O3 precipitates, including cracked or debonded Y2O3 particles.
Keyword Additive manufacturing
Rare earth elements
Selective electron beam melting
Titanium alloys
Yttrium
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2016 Collection
 
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