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 language | English |
|---|---|
| Pages (from-to) | 6165-6173 |
| Number of pages | 9 |
| Journal | Journal of Materials Engineering and Performance |
| Volume | 28 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 1 Oct 2019 |
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