Microstructural characteristics, hardness and tribological behavior of additive manufactured CM247LC nickel super alloy

Palanisamy Chandramohan; Raman Raghu; Olubambi Peter Apata

doi:10.1051/e3sconf/202450501038

E3S Web of Conferences (Jan 2024)

Microstructural characteristics, hardness and tribological behavior of additive manufactured CM247LC nickel super alloy

Palanisamy Chandramohan,
Raman Raghu,
Olubambi Peter Apata

Affiliations

Palanisamy Chandramohan: Department of Mechanical Engineering, Sri Ramakrishna Engineering College
Raman Raghu: Department of Mechanical Engineering, Sri Ramakrishna Engineering College
Olubambi Peter Apata: Department of Metallurgy, University of Johannesburg

DOI: https://doi.org/10.1051/e3sconf/202450501038
Journal volume & issue: Vol. 505
p. 01038

Abstract

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Nickel superalloy CM247LC was fabricated by laser powder bed fusion (LPBF) and its microstructure, hardness and tribological properties were investigated. X-ray diffraction analysis showed the presence of γ, γ′ and metastable MC carbides. Microstructure revealed cellular structure with fine MC carbides at cell boundaries. Higher hardness of 408 HV was attributed to grain refinement from rapid solidification and strengthening from MC carbides. Wear testing showed lowest wear rate of 1.46x10-9 mm3/m at 10 N load and predominant wear mechanisms were abrasive and adhesive wear. This study recommends LPBF as a promising method for manufacturing CM247LC superalloy for load bearing and tribological applications.

Published in E3S Web of Conferences

ISSN: 2267-1242 (Online)
Publisher: EDP Sciences
Country of publisher: France
LCC subjects: Geography. Anthropology. Recreation: Environmental sciences
Website: http://www.e3s-conferences.org/

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