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Microstructure and mechanical properties of B modified Ti–Fe alloy manufactured by casting, forging and laser melting deposition
- Source :
- Composites Part B: Engineering. 216:108854
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Titanium alloys manufactured via additive manufacturing are suffering from coarse columnar grains due to the insufficient spontaneous nucleation rate during solidification. In this study, a newly designed Ti–2Fe-0.1B alloy with higher nucleating agent were introduced and manufactured by laser melting deposition method. The manufactured part is presenting a fully equiaxed grain morphology with 779 MPa on ultimate tensile strength. In order to reveal the mechanism of equiaxed grain formation and its influence on mechanical properties, a comprehensive study of microstructure evolution was carried out on Ti–2Fe-0.1B alloy manufactured via casting, forging and laser melting deposition. The results indicate that cooling speed are playing an important role on TiB morphology and Ti–2Fe-0.1B grain size simultaneously. The TiB formed from fast cooling speed are presenting a 3D quasi-network structure and improves the ultimate tensile strength of laser melting deposited part by 1.7 and 1.5 times when compared with casting and forging parts correspondingly. The study reveals that B addition is a sufficient method to control equiaxed grain formation in additive manufacturing of Ti–Fe alloy and promotes B addition as grain morphology controlling method in other additive manufactured titanium alloys in future.
- Subjects :
- Equiaxed crystals
Materials science
Mechanical Engineering
Alloy
Titanium alloy
02 engineering and technology
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
Microstructure
01 natural sciences
Casting
Industrial and Manufacturing Engineering
Grain size
Forging
0104 chemical sciences
Mechanics of Materials
Ultimate tensile strength
Ceramics and Composites
engineering
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 13598368
- Volume :
- 216
- Database :
- OpenAIRE
- Journal :
- Composites Part B: Engineering
- Accession number :
- edsair.doi...........64a02ad1285f6130bb46180f264cd3b1