Influence of beam current on microstructure of electron beam melted Ti-6Al-4V alloy

Research output: Contribution to journalArticle

Abstract

The defect microstructure of the samples manufactured from Ti-6Al-4V powder was studied using electron beam melting (EBM) in the beam current range of 17 - 13 mA. The hybrid digital complex combined positron lifetime spectroscopy and coincidence Doppler broadening spectroscopy was used to characterize the defect structure of the materials. The microstructure and defects were also analyzed by transmission electron microscopy. It has been established that the main type of the defects in the EBM manufactured samples is dislocations. According to the conducted measurements and calculations, the dislocation density in the EBM manufactured samples exceeds by two orders the similar value for the cast Ti-6Al-4Valloy. Formation of Ti-Ti-Al nanoscale clusters has been found in the EBM manufactured samples.

Original languageEnglish
JournalProgress in Natural Science: Materials International
DOIs
Publication statusAccepted/In press - 1 Jan 2019

Fingerprint

Electron beam melting
Electron beams
Microstructure
Defects
Spectroscopy
Defect structures
Doppler effect
Positrons
Powders
Transmission electron microscopy
titanium alloy (TiAl6V4)

Keywords

  • Additive technology
  • Defects
  • Electron beam melting
  • Positron spectroscopy
  • Titanium alloy
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

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title = "Influence of beam current on microstructure of electron beam melted Ti-6Al-4V alloy",
abstract = "The defect microstructure of the samples manufactured from Ti-6Al-4V powder was studied using electron beam melting (EBM) in the beam current range of 17 - 13 mA. The hybrid digital complex combined positron lifetime spectroscopy and coincidence Doppler broadening spectroscopy was used to characterize the defect structure of the materials. The microstructure and defects were also analyzed by transmission electron microscopy. It has been established that the main type of the defects in the EBM manufactured samples is dislocations. According to the conducted measurements and calculations, the dislocation density in the EBM manufactured samples exceeds by two orders the similar value for the cast Ti-6Al-4Valloy. Formation of Ti-Ti-Al nanoscale clusters has been found in the EBM manufactured samples.",
keywords = "Additive technology, Defects, Electron beam melting, Positron spectroscopy, Titanium alloy, Transmission electron microscopy",
author = "Roman Laptev and Natalia Pushilina and Egor Kashkarov and Maxim Syrtanov and Ekaterina Stepanova and Andrey Koptyug and Andrey Lider",
year = "2019",
month = "1",
day = "1",
doi = "10.1016/j.pnsc.2019.04.011",
language = "English",
journal = "Progress in Natural Science: Materials International",
issn = "1002-0071",
publisher = "Chinese Materials Research Society",

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TY - JOUR

T1 - Influence of beam current on microstructure of electron beam melted Ti-6Al-4V alloy

AU - Laptev, Roman

AU - Pushilina, Natalia

AU - Kashkarov, Egor

AU - Syrtanov, Maxim

AU - Stepanova, Ekaterina

AU - Koptyug, Andrey

AU - Lider, Andrey

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The defect microstructure of the samples manufactured from Ti-6Al-4V powder was studied using electron beam melting (EBM) in the beam current range of 17 - 13 mA. The hybrid digital complex combined positron lifetime spectroscopy and coincidence Doppler broadening spectroscopy was used to characterize the defect structure of the materials. The microstructure and defects were also analyzed by transmission electron microscopy. It has been established that the main type of the defects in the EBM manufactured samples is dislocations. According to the conducted measurements and calculations, the dislocation density in the EBM manufactured samples exceeds by two orders the similar value for the cast Ti-6Al-4Valloy. Formation of Ti-Ti-Al nanoscale clusters has been found in the EBM manufactured samples.

AB - The defect microstructure of the samples manufactured from Ti-6Al-4V powder was studied using electron beam melting (EBM) in the beam current range of 17 - 13 mA. The hybrid digital complex combined positron lifetime spectroscopy and coincidence Doppler broadening spectroscopy was used to characterize the defect structure of the materials. The microstructure and defects were also analyzed by transmission electron microscopy. It has been established that the main type of the defects in the EBM manufactured samples is dislocations. According to the conducted measurements and calculations, the dislocation density in the EBM manufactured samples exceeds by two orders the similar value for the cast Ti-6Al-4Valloy. Formation of Ti-Ti-Al nanoscale clusters has been found in the EBM manufactured samples.

KW - Additive technology

KW - Defects

KW - Electron beam melting

KW - Positron spectroscopy

KW - Titanium alloy

KW - Transmission electron microscopy

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