Production of Superplastic Ti-6Al-7Nb Alloy Using High-Pressure Sliding Process
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00511894" target="_blank" >RIV/68081723:_____/19:00511894 - isvavai.cz</a>
Result on the web
<a href="https://www.jstage.jst.go.jp/article/matertrans/60/9/60_ME201924/_html/-char/en" target="_blank" >https://www.jstage.jst.go.jp/article/matertrans/60/9/60_ME201924/_html/-char/en</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.2320/matertrans.ME201924" target="_blank" >10.2320/matertrans.ME201924</a>
Alternative languages
Result language
angličtina
Original language name
Production of Superplastic Ti-6Al-7Nb Alloy Using High-Pressure Sliding Process
Original language description
A Ti-6Al-7Nb alloy was processed by severe plastic deformation through high-pressure sliding (HPS) at room temperature for grain refinement. The microstructure consists of grains with sizes of 200-300nm in diameter having high and low angles boundaries. Superplasticity appeared with the total elongation of more than 400% and this was more likely when the tensile specimen is deformed in the direction parallel than perpendicular to the sliding direction. However, the superplastic elongation is almost the same irrespective of whether the sliding was made in the single direction or in the reversible directions as far as the total sliding distance is the same. The total elongation is invariably higher for the tensile testing at 1123K than at the other temperatures, reaching the highest elongation of 790% at the initial strain rate of 1 x 10(-3) s(-1). The strain rate sensitivity and the activation energy for the deformation were determined to be more than similar to 0.3 and 199 kJ/mol, respectively. The microstructural observation reveals that the alpha phase region covers more than 85% of the tensile specimens after deformation and their grains are equiaxed in shape. It is concluded that the superplastic deformation is mainly controlled by grain boundary sliding through thermally activation by lattice diffusion.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materials Transactions
ISSN
1345-9678
e-ISSN
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Volume of the periodical
60
Issue of the periodical within the volume
9
Country of publishing house
JP - JAPAN
Number of pages
7
Pages from-to
1785-1791
UT code for WoS article
000489965000010
EID of the result in the Scopus database
2-s2.0-85071438266