MATEC Web Conf.
Volume 321, 2020The 14th World Conference on Titanium (Ti 2019)
|Number of page(s)||4|
|Published online||12 October 2020|
Decomposition of the β phase at intermediate temperature in β-metastable Ti-5553 alloy
a Université de Lorraine - CNRS, IJL, 2 allée André Guinier, 54000 Nancy, France
b CIRIMAT, Université de Toulouse, 4 allée Emile Monso, 31030 Toulouse, France
c Safran Landing Systems, site de Bidos, 9 rue Guynemer, 64401 Oloron Sainte Marie, France
The present contribution focuses on the nature of the β → α transformation in Ti-5333 alloy at intermediate temperatures. It is indeed still unclear whether this transformation is only controlled by bulk diffusion or whether interfacial kinetics may play a role. To address this issue, we have combined SEM and STEM-EDX to measure the concentrations of Al, Cr, Mo, V and Fe in α intragranular precipitates as well as in the abutting β matrix, paying a particular attention to the concentrations at flat interfaces corresponding to the precipitates habit planes. The comparison with Calphad calculations suggests that interfaces are not at equilibrium during the thickening of the plates.
Key words: Ti-5553 alloy / phase transformation kinetics / STEM-EDX analysis / α/β interfaces
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.