Please use this identifier to cite or link to this item: doi:10.22028/D291-30558
Title: In Situ Analysis of the Phase Transformation Kinetics in the β-Water-Quenched Ti-5Al-5Mo-5V-3Cr-1Zr Alloy during Ageing after Fast Heating
Author(s): Paiotti Marcondes Guimarães, Rafael
Callegari, Bruna
Warchomicka, Fernando
Aristizabal, Katherine
Soldera, Flavio
Mücklich, Frank
Cavalcanti Pinto, Haroldo
Language: English
Title: Quantum Beam Science
Volume: 4
Issue: 1
Publisher/Platform: MDPI
Year of Publication: 2020
Free key words: high-energy X-ray diffraction
near-beta titanium alloys
Rietveld refinement
spinodal decomposition
metastable phases
DDC notations: 500 Science
600 Technology
Publikation type: Journal Article
Abstract: Thermal treatments are the main route to achieve improvements in mechanical properties of β-metastable titanium alloys developed for structural applications in automotive and aerospace industries. Therefore, it is of vital importance to determine phase transformation kinetics and mechanisms of nucleation and precipitation during heat treatment of these alloys. In this context, the present paper focuses on the assessment of solid-state transformations in a β-water-quenched Ti-5Al-5Mo-5V-3Cr-1Zr alloy during the early stages of ageing treatment at 500 ◦C. In situ tracking of transformations was performed using high-energy synchrotron X-ray diffraction. The transformation sequence β + ω → α + α”iso + β is proposed to take place during this stage. Results show that isothermal α” phase precipitates from ω and from spinodal decomposition domains of the β phase, whereas α nucleates from ω, β and also from α” with different morphologies. Isothermal α” is considered to be the regulator of transformation kinetics. Hardness measurements confirm the presence of ω, although this phase was not detected by X-ray diffraction during the in situ treatment.
DOI of the first publication: 10.3390/qubs4010012
Link to this record: urn:nbn:de:bsz:291--ds-305585
ISSN: 2412-382X
Date of registration: 14-Dec-2020
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Frank Mücklich
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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