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Mapping the geometry of Ti-6Al-4V: From martensite decomposition to localized spheroidization during selective laser melting

Barriobero Vila, Pere and Artzt, Katia and Stark, Andreas and Schell, Norbert and Siggel, Martin and Gussone, Joachim and Kleinert, Jan and Kitsche, W. and Requena, Guillermo and Haubrich, Jan (2020) Mapping the geometry of Ti-6Al-4V: From martensite decomposition to localized spheroidization during selective laser melting. Scripta Materialia, 182 (-), pp. 48-52. Elsevier. doi: 10.1016/j.scriptamat.2020.02.043. ISSN 1359-6462.

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Official URL: https://doi.org/10.1016/j.scriptamat.2020.02.043

Abstract

The influence that complex component geometries can have on microstructure formation is investigated in a rocket engine impeller fabricated of a Ti-6Al-4V alloy by selective laser melting (SLM). The SLM melt pool monitoring, indicative of the component's thermal history during processing, is linked to the bulk mapping of martensite decomposition obtained by high energy synchrotron X-ray diffraction. In addition to the martensitic and lamellar microstructures typically obtained during SLM of Ti-6Al-4V, spheroidization is identified to take place in the component's down-skin regions. Grain boundary migration may contribute to the latter effect. Small recrystallized grains form along grain boundaries.

Item URL in elib:https://elib.dlr.de/141334/
Document Type:Article
Additional Information:Referierte Publikation - Ja
Title:Mapping the geometry of Ti-6Al-4V: From martensite decomposition to localized spheroidization during selective laser melting
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Barriobero Vila, PereUNSPECIFIEDhttps://orcid.org/0000-0002-4412-3729UNSPECIFIED
Artzt, KatiaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stark, AndreasHZG, GeesthachtUNSPECIFIEDUNSPECIFIED
Schell, NorbertHZG, GeesthachtUNSPECIFIEDUNSPECIFIED
Siggel, MartinUNSPECIFIEDhttps://orcid.org/0000-0002-3952-4659UNSPECIFIED
Gussone, JoachimUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kleinert, JanUNSPECIFIEDhttps://orcid.org/0000-0002-2709-214XUNSPECIFIED
Kitsche, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Requena, GuillermoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Haubrich, JanUNSPECIFIEDhttps://orcid.org/0000-0002-5748-2755UNSPECIFIED
Date:1 June 2020
Journal or Publication Title:Scripta Materialia
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:182
DOI:10.1016/j.scriptamat.2020.02.043
Page Range:pp. 48-52
Publisher:Elsevier
ISSN:1359-6462
Status:Published
Keywords:Selective laser melting, Titanium alloys, Microstructure, X-ray diffraction, Synchrotron radiation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Material Design and New Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research
Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Barriobero Vila, Pere
Deposited On:25 Mar 2021 08:01
Last Modified:23 Oct 2023 14:27

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