Thermal analysis of precipitation reactions in a Ti-25Nb-3Mo-3Zr-2Sn alloy

Kent, Damon, Pas, Steven, Zhu, Suming, Wang, Gui and Dargusch, Matthew S. (2012) Thermal analysis of precipitation reactions in a Ti-25Nb-3Mo-3Zr-2Sn alloy. Applied Physics A: Materials Science and Processing, 107 4: 835-841. doi:10.1007/s00339-012-6778-9


Author Kent, Damon
Pas, Steven
Zhu, Suming
Wang, Gui
Dargusch, Matthew S.
Title Thermal analysis of precipitation reactions in a Ti-25Nb-3Mo-3Zr-2Sn alloy
Journal name Applied Physics A: Materials Science and Processing   Check publisher's open access policy
ISSN 0947-8396
1432-0630
Publication date 2012-06
Sub-type Article (original research)
DOI 10.1007/s00339-012-6778-9
Volume 107
Issue 4
Start page 835
End page 841
Total pages 7
Place of publication Heidelberg, Germany
Publisher Springer
Collection year 2013
Language eng
Formatted abstract
A study was undertaken on a Ti-25Nb-3Mo- 3Zr-2Sn alloy using differential scanning calorimetry (DSC) in order to improve understanding of the precipitation reactions occurring during aging heat treatments. The investigation showed that isothermal μ phase can be formed in the cast and solution treated alloy at low aging temperatures. An exothermic peak in the temperature range of 300 to 400°C was detected for precipitation of the μ phase, with approximate activation energy of 176 kJ/mol. The μ phase begins to dissolve at temperatures around 400°C and precipitation of the α phase is favoured at higher temperatures between 400°C and 600°C. An exothermic peak with activation energy of 197 kJ/mol was measured for precipitation of the α phase. Deformation resulting in the formation of the stress induced αα′′ phase altered the DSC heating profile for the solution treated alloy. The exothermic peak associated with precipitation of the μ phase was not detected during heating of the deformed material and increased endothermic heating associated with recovery and recrystallisation was observed.
Keyword Ti-Nb alloys
Martensitic-transformation
Titanium-alloy
Omega
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 2013 Collection
 
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