Microstructural, mechanical and wear behaviour of Inconel-718 produced through laser-powder bed-fused additive manufacturing

Abstract

The present work deals with the microstructure, nanoindentation and wear behaviour of Inconel-718 (IN-718) specimens fabricated through laser-powder bed fusion (L-PBF). To ensure the improvement in L-PBF, the results obtained were compared with the as-cast IN-718 specimen. Though IN-718 specimens exhibited precipitation and solid solution strengthening in both the fabrication techniques, L-PBF specimen has achieved better mechanical properties due to refinement of grains. The wear rate of cast and L-PBF IN-718 specimens were 0.98 and 0.27 mm³ m⁻¹, respectively. Besides, the roughness average was reduced for L-PBF produced worn surface compared to as-cast specimen. In the light of the above observations, L-PBF can be a promising technique to fabricate IN-718 alloys for load carrying and wear applications.

KEYWORDS:

• Laser-powder bed fusion
• additive manufacturing
• microstructure
• nanoindentation
• wear mechanism
• roughness
• Nickel superalloy
• Phase analysis

Acknowledgment

Financial support from Ministry of Science and Technology (MOST), Taiwan, ROC through grant number MOST-107-2218-E-027-009 is gratefully acknowledged.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Conflict of interest

The authors declare no conflict of interest.

Data availability statement

The experimental datasets obtained from this research work and then the analysed results during the current study are available from the corresponding author on reasonable request.

Additional information

Funding

This work was supported by Ministry of Science and Technology, Taiwan: [grant number MOST-107-2218-E-027-009].