Beam Current Effect on Microstructure and Properties of Electron-Beam-Melted Ti-6Al-4V Alloy

Research output: Contribution to journalArticle

Abstract

In this study, a noncommercial 3D printing machine was used to fabricate Ti-6Al-4V alloy by electron-beam melting (EBM). The influence of beam current on the microstructure, phase composition and mechanical properties of electron-beam-melted Ti-6Al-4V alloy was investigated. Numerical simulation is implemented to evaluate thermal fields during electron-beam melting of Ti-6Al-4V powder. The decrease in beam current from 3.5 to 2.5 mA leads to refinement of microstructure: The average width of α plates decreases from 10 down to 6 μm. The formation of finer microstructure is attributed to higher cooling rate at lower beam current confirmed by simulation. The phase composition of EBM Ti-6Al-4V indirectly depends on the beam current. High content of β phase (7%) was achieved at the beam current of 3 mA. The produced Ti-6Al-4V samples are characterized by high microhardness (470-520 HV).

Original languageEnglish
Pages (from-to)6165-6173
Number of pages9
JournalJournal of Materials Engineering and Performance
Volume28
Issue number10
DOIs
Publication statusPublished - 1 Oct 2019

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Electron beam melting
Electron beams
Phase composition
Microstructure
Powders
Microhardness
Printing
Cooling
Mechanical properties
Computer simulation
titanium alloy (TiAl6V4)

Keywords

  • additive manufacturing
  • electron-beam melting
  • microhardness
  • microstructure
  • simulation models
  • Ti-6Al-4V titanium alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Beam Current Effect on Microstructure and Properties of Electron-Beam-Melted Ti-6Al-4V Alloy",
abstract = "In this study, a noncommercial 3D printing machine was used to fabricate Ti-6Al-4V alloy by electron-beam melting (EBM). The influence of beam current on the microstructure, phase composition and mechanical properties of electron-beam-melted Ti-6Al-4V alloy was investigated. Numerical simulation is implemented to evaluate thermal fields during electron-beam melting of Ti-6Al-4V powder. The decrease in beam current from 3.5 to 2.5 mA leads to refinement of microstructure: The average width of α plates decreases from 10 down to 6 μm. The formation of finer microstructure is attributed to higher cooling rate at lower beam current confirmed by simulation. The phase composition of EBM Ti-6Al-4V indirectly depends on the beam current. High content of β phase (7{\%}) was achieved at the beam current of 3 mA. The produced Ti-6Al-4V samples are characterized by high microhardness (470-520 HV).",
keywords = "additive manufacturing, electron-beam melting, microhardness, microstructure, simulation models, Ti-6Al-4V titanium alloy",
author = "Pushilina, {N. S.} and Klimenov, {V. A.} and Cherepanov, {R. O.} and Kashkarov, {E. B.} and Fedorov, {V. V.} and Syrtanov, {M. S.} and Lider, {A. M.} and Laptev, {R. S.}",
year = "2019",
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doi = "10.1007/s11665-019-04344-0",
language = "English",
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AU - Pushilina, N. S.

AU - Klimenov, V. A.

AU - Cherepanov, R. O.

AU - Kashkarov, E. B.

AU - Fedorov, V. V.

AU - Syrtanov, M. S.

AU - Lider, A. M.

AU - Laptev, R. S.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - In this study, a noncommercial 3D printing machine was used to fabricate Ti-6Al-4V alloy by electron-beam melting (EBM). The influence of beam current on the microstructure, phase composition and mechanical properties of electron-beam-melted Ti-6Al-4V alloy was investigated. Numerical simulation is implemented to evaluate thermal fields during electron-beam melting of Ti-6Al-4V powder. The decrease in beam current from 3.5 to 2.5 mA leads to refinement of microstructure: The average width of α plates decreases from 10 down to 6 μm. The formation of finer microstructure is attributed to higher cooling rate at lower beam current confirmed by simulation. The phase composition of EBM Ti-6Al-4V indirectly depends on the beam current. High content of β phase (7%) was achieved at the beam current of 3 mA. The produced Ti-6Al-4V samples are characterized by high microhardness (470-520 HV).

AB - In this study, a noncommercial 3D printing machine was used to fabricate Ti-6Al-4V alloy by electron-beam melting (EBM). The influence of beam current on the microstructure, phase composition and mechanical properties of electron-beam-melted Ti-6Al-4V alloy was investigated. Numerical simulation is implemented to evaluate thermal fields during electron-beam melting of Ti-6Al-4V powder. The decrease in beam current from 3.5 to 2.5 mA leads to refinement of microstructure: The average width of α plates decreases from 10 down to 6 μm. The formation of finer microstructure is attributed to higher cooling rate at lower beam current confirmed by simulation. The phase composition of EBM Ti-6Al-4V indirectly depends on the beam current. High content of β phase (7%) was achieved at the beam current of 3 mA. The produced Ti-6Al-4V samples are characterized by high microhardness (470-520 HV).

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KW - simulation models

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