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Phase transformations drive microstructure control in titanium alloys for additive manufacturing

Barriobero Vila, Pere and Vallejos, Juan Manuel and Bugelnig, Katrin and Gussone, Joachim and Silva-Reyes, Kenneth and Villanova, Julie and Stark, Andreas and Schell, Norbert and Haubrich, Jan and Requena, Guillermo (2020) Phase transformations drive microstructure control in titanium alloys for additive manufacturing. THERMEC'2021 INTERNATIONAL CONFERENCE ON PROCESSING & MANUFACTURING OF ADVANCED MATERIALS, 10.05.2020-14.05.2020, Graz, Austria.

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Abstract

Metal-based additive layer manufacturing (ALM) is resulting in a paradigm change that could revolutionize manufacturing across multiple industries such as the aerospace, biomedical and automotive sectors. However, limited alloys are compatible with ALM. Today, most of the alloys being used for this technique were developed for other manufacturing processes such as casting and forging processes where the mechanical properties can be controlled using thermal and thermo-mechanical processing, but not by the rapid solidification conditions of ALM (steep heating and cooling rates between ~ 103-108 °C/s). In that context, the activation of phase transformations in ALM alloys plays a key role to obtain microstructures with direct properties in the as-built state. This work uses time-resolved characterization to reveal the influence of phase transformations on microstructure formation and deformation mechanisms, which take place in Ti-alloys particularly developed for ALM. The phase evolution in these alloys, fabricated by the powder-bed ALM technique selective laser melting, is investigated using in situ synchrotron tomography and in situ high energy synchrotron X-ray diffraction. They are developed to tackle the main drawbacks occurring in Ti-alloys fabricated by ALM, namely the formation of microstructures with anisotropy and poor ductility.

Item URL in elib:https://elib.dlr.de/141658/
Document Type:Conference or Workshop Item (Speech)
Title:Phase transformations drive microstructure control in titanium alloys for additive manufacturing
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Barriobero Vila, PereUNSPECIFIEDhttps://orcid.org/0000-0002-4412-3729UNSPECIFIED
Vallejos, Juan ManuelNortheast National UniversityUNSPECIFIEDUNSPECIFIED
Bugelnig, KatrinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gussone, JoachimUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Silva-Reyes, KennethUniversity of Puerto Rico at MayagüezUNSPECIFIEDUNSPECIFIED
Villanova, JulieEuropean Synchrotron Radiation Facility (ESRF)UNSPECIFIEDUNSPECIFIED
Stark, AndreasHZG, GeesthachtUNSPECIFIEDUNSPECIFIED
Schell, NorbertUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Haubrich, JanUNSPECIFIEDhttps://orcid.org/0000-0002-5748-2755UNSPECIFIED
Requena, GuillermoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:2020
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Metal additive manufacturing, titanium alloys, time-resolved synchroton characterization
Event Title:THERMEC'2021 INTERNATIONAL CONFERENCE ON PROCESSING & MANUFACTURING OF ADVANCED MATERIALS
Event Location:Graz, Austria
Event Type:international Conference
Event Dates:10.05.2020-14.05.2020
Organizer:Graz University of Technology
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Advanced Materials and New Manufacturing Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research
Deposited By: Barriobero Vila, Pere
Deposited On:30 Apr 2021 07:21
Last Modified:29 Mar 2023 00:09

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