Microstructure, mechanical, and wear properties of thin-walled Ti6Al4V parts produced using laser powder bed fusion technique

Kushwaha, Ajay; Kumar, S. Anand; Kenchappa, Nagesha Bommanahalli; Barad, Sanjay

doi:10.1016/j.matlet.2021.131138

Cited by 9 publications

(1 citation statement)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The TC4 wire cladding coating exhibits a plastic deformation area in the presence of a large abrasion area, whereas the composite coating eliminates the abrasion area. This change in the wear mechanism is associated with the microhardness of the coating [ 44 , 45 ]. The TC4 coating exhibits low microhardness and is susceptible to adhesive wear, whereas the composite coating demonstrates relatively high microhardness and is resistant to adhesive wear.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and Wear Resistance of Si-TC4 Composite Coatings by High-Speed Wire-Powder Laser Cladding

Men,

Sun,

et al. 2024

Materials

View full text Add to dashboard Cite

The hardness and wear resistance of the surface of TC4 titanium alloy, which is widely used in aerospace and other fields, need to be improved urgently. Considering the economy, environmental friendliness, and high efficiency, Si-reinforced Ti-based composite coatings were deposited on the TC4 surface by the high-speed wire-powder laser cladding method, which combines the paraxial feeding of TC4 wires with the coaxial feeding of Si powders. The microstructures and wear resistance of the coatings were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), Vickers hardness tester, and friction and wear tester. The results indicate that the primary composition of the coating consisted of α-Ti and Ti5Si3. The microstructure of the coating underwent a notable transformation process from dendritic to petal, bar, and block shapes as the powder feeding speed increased. The hardness of the composite coatings increased with the increasing Si powder feeding rate, and the average hardness of the composite coating was 909HV0.2 when the feeding rate reached 13.53 g/min. The enhancement of the microhardness of the coatings can be attributed primarily to the reinforcing effect of the second phase generated by Ti5Si3 in various forms within the coatings. As the powder feeding speed increased, the wear resistance initially improved before deteriorating. The optimal wear resistance of the coating was achieved at a powder feeding rate of 6.88 g/min (wear loss of 2.55 mg and friction coefficient of 0.12). The main wear mechanism for coatings was abrasive wear.

show abstract

Section: Resultsmentioning

confidence: 99%

Microstructure and Wear Resistance of Si-TC4 Composite Coatings by High-Speed Wire-Powder Laser Cladding

Men,

Sun,

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

Investigating Complex Geometrical Features in LPBF-Produced Parts: A Material-Based Comparison Between Different Titanium Alloys

et al. 2023

View full text Add to dashboard Cite

The Ti–6Al–4V (Ti64) alloy is a well-established material to be processed via laser powder bed fusion (LPBF). Recently, other α + β titanium alloys are receiving attention, such as Ti–6Al–2Sn–4Zr–6Mo (Ti6246). Their typical industrial fields of application (aerospace, automotive), often require critical design choices, such as low wall thicknesses and hollow channels. Thus, a comparative analysis between these two competitor alloys in terms of processability was conducted in this work. To do so, specific sample designs were developed. The specimens were analyzed in terms of geometrical compliance with the initial design, porosity, and microstructure. A correlation between the width of the specimens and their porosity, microstructure and hardness was found. Overall, both the alloys proved to be well processable, even for very low wall thickness (300 μm) and channel diameter (1 mm) values. Nevertheless, the Ti6246 alloy seemed to behave better in specific scenarios. For instance, some Ti64 specimens provided delamination. The hollow channels proved to be challenging for both materials, mainly due to the high amount of residual powder particles adhered to the upper part of the holes. This works aims at giving a materials perspective on process-related issues, considering the LPBF-induced defectology and microstructural variations in these Ti alloys. Graphical Abstract

show abstract

Effects of Graded Powder Dosage Factors on the Densification of LPBF Processed Inconel 718

Tigga

Kumar

Kenchappa

et al. 2023

Trans Indian Inst Met

View full text Add to dashboard Cite

Microstructure, mechanical, and wear properties of thin-walled Ti6Al4V parts produced using laser powder bed fusion technique

Cited by 9 publications

References 23 publications

Microstructure and Wear Resistance of Si-TC4 Composite Coatings by High-Speed Wire-Powder Laser Cladding

Microstructure and Wear Resistance of Si-TC4 Composite Coatings by High-Speed Wire-Powder Laser Cladding

Investigating Complex Geometrical Features in LPBF-Produced Parts: A Material-Based Comparison Between Different Titanium Alloys

Effects of Graded Powder Dosage Factors on the Densification of LPBF Processed Inconel 718

Contact Info

Product

Resources

About