TY - JOUR
T1 - New insights into the microstructural evolution of Ti-5Al-5Mo-5V-3Cr alloy during hot working
AU - Callegari, B.
AU - Oliveira, J. P.
AU - Coelho, Rodrigo Santos
AU - Schell, N.
AU - Brito, Pedro Paiva
AU - Soldera, F. A.
AU - Mücklich, F.
AU - Sadik, M. I.
AU - Garcia, Jose Luis
AU - Pinto, Haroldo Cavalcanti
N1 - info:eu-repo/grantAgreement/EC/H2020/730872/EU#
This work was supported by the National Council for Scientific and Technological Development - CNPq (grant number 161959/2015-6), by the Coordination for the Improvement of Higher Education Personnel - CAPES (grant number 88887.302880/2018-00 and PROBRAL project 88881.143948/2017-01), by the German Academic Exchange Sevice - DAAD (project DAAD PPP-Brazil 2018 - ID 57390937), by Fundacao para a Ciencia e Tecnologia (FCT - MCTES) via the project UIDB/00667/2020 (UNIDEMI).
Horizon 2020 Framework Programme I-20190492 EC
PY - 2020/4/1
Y1 - 2020/4/1
N2 - Microstructural features resulting from thermomechanical treatment of the β-metastable Ti-5Al-5Mo-5V-3Cr (Ti-5553) alloy were studied by means of electron backscatter diffraction and X-ray diffraction. The alloy was deformed at 950 °C (β field) and 800 °C (α + β field) with strain rates of 0.001 s− 1 and 0.1 s− 1 in compression mode up to a compression ratio of 0.5 (true ratio = 0.7). It was concluded that β phase undergoes dynamic recovery both above and below its β-transus temperature, and recovery is more dominant at lower strain rates, which was corroborated by EBSD misorientation measurements. Meanwhile, α phase undergoes not only a process of breakage and globularization, but also decomposition, which contributes to flow softening. The increase in strain rate caused non-uniform recovery at 950 °C and a more intense refinement of α precipitates at 800 °C. Macrotexture evaluation after deformation indicates that β's texture is much stronger than that of α, with its (200) component being the strongest one.
AB - Microstructural features resulting from thermomechanical treatment of the β-metastable Ti-5Al-5Mo-5V-3Cr (Ti-5553) alloy were studied by means of electron backscatter diffraction and X-ray diffraction. The alloy was deformed at 950 °C (β field) and 800 °C (α + β field) with strain rates of 0.001 s− 1 and 0.1 s− 1 in compression mode up to a compression ratio of 0.5 (true ratio = 0.7). It was concluded that β phase undergoes dynamic recovery both above and below its β-transus temperature, and recovery is more dominant at lower strain rates, which was corroborated by EBSD misorientation measurements. Meanwhile, α phase undergoes not only a process of breakage and globularization, but also decomposition, which contributes to flow softening. The increase in strain rate caused non-uniform recovery at 950 °C and a more intense refinement of α precipitates at 800 °C. Macrotexture evaluation after deformation indicates that β's texture is much stronger than that of α, with its (200) component being the strongest one.
KW - Electron backscattered diffraction
KW - Microstructure evolution
KW - Synchrotron X-ray diffraction
KW - Thermomechanical processing
KW - Titanium alloys
UR - http://www.scopus.com/inward/record.url?scp=85079319114&partnerID=8YFLogxK
U2 - 10.1016/j.matchar.2020.110180
DO - 10.1016/j.matchar.2020.110180
M3 - Article
AN - SCOPUS:85079319114
VL - 162
JO - Materials Characterization
JF - Materials Characterization
SN - 1044-5803
M1 - 110180
ER -