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Exploiting Metastability and Lattice Defects for Microstructural Engineering of SLM Ti-6Al-4V

Haubrich, Jan and Artzt, Katia Juliane and Barriobero Vila, Pere and Gussone, Joachim and Kasperovich, Galina and Kürnsteiner, Philipp and Jägle, Eric A. and Requena, Guillermo (2018) Exploiting Metastability and Lattice Defects for Microstructural Engineering of SLM Ti-6Al-4V. Advanced additive Manufacturing Symposium AAMS18, 03.09.2018, Sheffield, GB.

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Additive manufacturing (AM) is a technology of enormous potential, yet also of enormous complexity. Unlike “conventional” manufacturing approaches, understanding and exploiting AM requires very interdisciplinary research efforts since material, processing, AM-conformal design & engineering, build strategies, post-treatments and surface finishing are all interdependent. Particularly for load-bearing “class-one” components in space applications, achieving high material quality and performance in a robust AM process such as Selective Laser Melting (SLM) is a major hurdle. The development of different SLM bulk processing and post-heat-treatment strategies for Ti-6Al-4V including intensified intrinsic heat treatment and in situ high-temperature build space heating to obtain stabilized microstructures with fine -particles and films will be presented. Heat treatments act to stabilize the initial as-built microstructures by decomposition of the acicular martensite in conjunction with pronounced element partitioning. New-phase nucleates at prior lattice defects in the as-built microstructures, leading to favorable materials properties. The bulk parameter studies link to development manufacturing strategies, for which further aspects such as parameter-dependence of residual stress (AAMS contribution of T. Mishurova), SLM contour- and downskin processing, and build/support strategies have been studied (AAMS contribution of K. Artzt).

Item URL in elib:https://elib.dlr.de/122502/
Document Type:Conference or Workshop Item (Poster)
Title:Exploiting Metastability and Lattice Defects for Microstructural Engineering of SLM Ti-6Al-4V
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Haubrich, JanJan.Haubrich (at) dlr.deUNSPECIFIED
Artzt, Katia JulianeKatia.Artzt (at) dlr.deUNSPECIFIED
Barriobero Vila, PerePere.BarrioberoVila (at) dlr.deUNSPECIFIED
Gussone, JoachimJoachim.Gussone (at) dlr.deUNSPECIFIED
Kasperovich, GalinaGalina.Kasperovich (at) dlr.deUNSPECIFIED
Kürnsteiner, PhilippMPIE DüsseldorfUNSPECIFIED
Jägle, Eric A.MPIE DüsseldorfUNSPECIFIED
Requena, GuillermoGuillermo.Requena (at) dlr.deUNSPECIFIED
Date:3 September 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Additive Manufacturing; 3D-Printing
Event Title:Advanced additive Manufacturing Symposium AAMS18
Event Location:Sheffield, GB
Event Type:international Conference
Event Dates:03.09.2018
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):Proj Selec ALS Druckverfahren, R - Selec ALS Druckverfahren, L - Turbine Technologies, L - Fan and Compressor Technologies, L - Combustion Chamber Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research
Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Haubrich, Jan
Deposited On:30 Oct 2018 10:54
Last Modified:30 Oct 2018 10:54

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