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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U2 - 10.1016/j.pnsc.2019.04.011
DO - 10.1016/j.pnsc.2019.04.011
M3 - Article
AN - SCOPUS:85071277495
JO - Progress in Natural Science: Materials International
JF - Progress in Natural Science: Materials International
SN - 1002-0071
ER -