Impurity (Fe, Cl, and P)-induced grain boundary and secondary phases in commercially pure titanium (CP-Ti)

Yan, M., Luo, S. D., Schaffer, G. B. and Qian, M. (2013) Impurity (Fe, Cl, and P)-induced grain boundary and secondary phases in commercially pure titanium (CP-Ti). Metallurgical and Materials Transactions A, 44A 8: 3961-3969. doi:10.1007/s11661-013-1720-0

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Author Yan, M.
Luo, S. D.
Schaffer, G. B.
Qian, M.
Title Impurity (Fe, Cl, and P)-induced grain boundary and secondary phases in commercially pure titanium (CP-Ti)
Journal name Metallurgical and Materials Transactions A   Check publisher's open access policy
ISSN 1073-5623
1543-1940
Publication date 2013-08
Sub-type Article (original research)
DOI 10.1007/s11661-013-1720-0
Open Access Status File (Author Post-print)
Volume 44A
Issue 8
Start page 3961
End page 3969
Total pages 9
Place of publication United States
Publisher Springer New York
Collection year 2014
Language eng
Formatted abstract
A detailed transmission electron microscopy (TEM) study has been made of the microstructures of two as-sintered CP-Ti materials. We show that iron content at the impurity level of 1280 ppm, less than the limit (2000 ppm) for CP-Ti ASTM Grade 1, is sufficient to lead to the formation of a grain boundary (GB) β-Ti phase in the as-sintered microstructure due to segregation. The Fe-stabilized GB β-Ti phase contains ~7 at. pct Fe and ~1.5 at. pct Cl. In addition, nano-precipitates of ω-Ti exist in the Fe-stabilized GB β-Ti phase. A phosphorus (P)-enriched Ti-P-based phase was also identified, which has a tetragonal crystal structure with lattice parameters of (𝑎 = 𝑏 = 8.0 ± 0.2 Å and 𝑐 = 2.7 ± 0.2 Å) and is new to the existing database for Ti-P-enriched phases. As-sintered CP-Ti materials are thus not necessarily a single α-Ti phase material. These impurity-induced phases may exert potential impacts on the properties of sintered CP-Ti.
Keyword Powder-metallurgy
Alloys
Composites
Radiation
Hydride
Systems
Oxygen
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 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 7 times in Thomson Reuters Web of Science Article | Citations
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