Mechanical properties characterization of Ti-6Al-4 V grade 5 (recycled) additively manufactured by selective electron beam melting (EB-PBF)

Batalha, G.F.; Silva, L.C.; Coelho, R.S.; Teixeira, M.C.C.; Castro, T.L.; Pereira, M.V.S.; Adamiak, M.; Pawlyta, M.; Krzeminski, L.; Bialas, O.; Appiah, A.N.S.; Sitek, W.

doi:10.1016/j.engfailanal.2023.107892

Cited by 3 publications

(1 citation statement)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This complies with the need to limit the free ferrite content within the interface region of the heart adjacent to the carburized layer, especially for gear steel materials [27]. Figure 10c shows the depth of the carburized layer of the specimen, which increased in the same region for the SEBP specimen owing to the improved hardenability of the 22CrMoH steel by electron beam scanning [28,29], which enhanced the carburizing efficiency.…”

Section: Microstructure Analysissupporting

confidence: 54%

Effect of Scanning Electron Beam Pretreatment on Gas Carburization of 22CrMoH Gear Steel

Jiang,

Qu,

Liu

et al. 2024

Coatings

View full text Add to dashboard Cite

22CrMoH was selected for the gear steel material in this work, and the temperature field change in the scanning electron beam was analyzed to determine the optimal scanning parameters and explored the effect of scanning electron beam pretreatment (Abbreviated as: SEBP) on gas-carburizing (GC) efficiency and organizational properties of gear steel. The results showed that the scanning electron beam caused the material to form a thermally deformed layer 110 μm thick, and it promoted the adsorption of carbon atoms on the surface and their inward diffusion. Under the same gas-carburizing conditions, the carburizing efficiency was improved, and the thickness of the carburized layer increased from 0.78 to 1.09 mm. Furthermore, the hardness of the GC specimens with the SEBP increased from 615 to 638 HV0.05 at 0.1 mm of the sample surface, whereas the hardness of the cross-sectional region decreased gradually, indicating that the scanning electron beam enhanced the adhesion between the carburized layer and matrix zone. A comparative analysis of the microstructures of the GC specimens with and without the SEBP showed that the carbide particles in the surface layer of the samples become smaller and that of volume fraction of residual austenite reduced in size. In terms of the mechanical properties, the surface friction coefficient decreased from 0.87 to 0.46 μ and the GC specimen with the SEBP had a higher cross-sectional hardness gradient. Its friction coefficient was reduced from approximately 0.8 to almost 0.45 μ, and the wear amount of the specimens with SEBP was 47.7% of that of the matrix specimens.

show abstract

Section: Microstructure Analysissupporting

confidence: 54%