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Microstructure Tracking of Ti‐6Al‐4V by In‐Situ Synchrotron Diffraction During Thermomechanical Process in Beta Field

Warchomicka, Fernando and Zehetner, Egon and Poletti, Cecilia and Stark, Andreas and Requena, Guillermo (2016) Microstructure Tracking of Ti‐6Al‐4V by In‐Situ Synchrotron Diffraction During Thermomechanical Process in Beta Field. In: Proceedings of the 13th World Conference on Titanium. Wiley. 13th World Conference on Titanium, 16.-20.Aug. 2015, San Diego, USA. DOI: 10.1002/9781119296126 ISBN 9781119293668

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Official URL: http://onlinelibrary.wiley.com/book/10.1002/9781119296126

Abstract

The deformation mechanism of the α+β alloys is still controversially reported in the literature as either discontinuous dynamic recrystallization or dynamic recovery. This work analyses systematically the evolution of the microstructure of Ti-6Al-4V during and after deformation above the β-transus temperature by in-situ synchrotron diffraction to determine separately static and dynamic restoration mechanisms. Hot compression is carried out in the β field up to true strain of 0.6 and strain rates between 0.001 and 5s-1, followed by heat Treatment up to 5 minutes at the same temperature. The evolution of the Debye-Scherrer rings are analyzed to study the crystallographic behavior of individual grains and this information is correlated by microscopy. The deformation results in subgrains formation, denoting dynamic recovery as the main mechanism of restoration followed by continuous dynamic recrystallization. Static recrystallization observed after deformation and its high rate, could be the reason of misinterpretation of the dynamic restoration mechanisms.

Item URL in elib:https://elib.dlr.de/108581/
Document Type:Conference or Workshop Item (Speech)
Title:Microstructure Tracking of Ti‐6Al‐4V by In‐Situ Synchrotron Diffraction During Thermomechanical Process in Beta Field
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Warchomicka, FernandoUNSPECIFIEDUNSPECIFIED
Zehetner, EgonUNSPECIFIEDUNSPECIFIED
Poletti, CeciliaUNSPECIFIEDUNSPECIFIED
Stark, AndreasUNSPECIFIEDUNSPECIFIED
Requena, GuillermoGuillermo.Requena (at) dlr.deUNSPECIFIED
Date:2016
Journal or Publication Title:Proceedings of the 13th World Conference on Titanium
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1002/9781119296126
Publisher:Wiley
ISBN:9781119293668
Status:Published
Keywords:Ti-6Al-4V, hot deformation, heat treatment, in-situ high energy x-ray diffraction, microstructure
Event Title:13th World Conference on Titanium
Event Location:San Diego, USA
Event Type:international Conference
Event Dates:16.-20.Aug. 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Requena, Guillermo
Deposited On:29 Nov 2016 14:42
Last Modified:29 Nov 2016 14:42

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