Tailoring Microstructure of Selective Laser Melted TiAl-Alloy with In-Situ Heat Treatment via Multiple Laser Exposure

Igor Polozov, Artem Kantyukov, Anatoly Popovich, Vera Popovich

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Intermetallic titanium aluminide (TiAl) alloys are considered attractive materials for high-temperature applications in aerospace, automotive, and energy industries. Additive manufacturing is a promising way of producing complex TiAl-alloy parts; however, it remains challenging due to brittleness of this alloy. While high-temperature preheating can mitigate cracking during selective laser melting, the microstructure of TiAl-alloys still needs to be optimized to achieve better mechanical performance. In this work, multiple laser exposures were used during selective laser melting of TiAl-based alloy to tailor its microstructure. Applying additional laser exposure of up to 20 times per layer induced an in situ heat treatment, which allowed to modify volume fraction and size of different phases. Microstructure, phase and chemical composition, and hardness of TiAl-alloys were investigsated with regards to several laser exposures during the selective laser melting process.

Original languageEnglish
Title of host publicationTMS 2021 150th Annual Meeting and Exhibition Supplemental Proceedings
Place of PublicationCham, Switzerland
PublisherSpringer
Pages197-204
ISBN (Electronic)978-3-030-65261-6
ISBN (Print)978-3-030-65260-9
DOIs
Publication statusPublished - 2021
Event150th Annual Meeting and Exhibition of The Minerals, Metals and Materials Society, TMS 2021 - Pittsburgh, United States
Duration: 15 Mar 202118 Mar 2021

Publication series

NameMinerals, Metals and Materials Series
Volume5
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Conference

Conference150th Annual Meeting and Exhibition of The Minerals, Metals and Materials Society, TMS 2021
CountryUnited States
CityPittsburgh
Period15/03/2118/03/21

Keywords

  • Additive manufacturing
  • In situ heat treatment
  • Intermetallic
  • Selective laser melting
  • TiAl alloy

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