Journal Published Online: 24 February 2022
Volume 6, Issue 1

Performance Analysis of Electro-chemical Machining of Ti-48Al-2Nb-2Cr Produced by Electron Beam Melting



Ti-48Al-2Nb-2Cr is a challenging and difficult-to-cut titanium aluminide (TiAl) alloy with several manufacturing issues because of the high sensitivity to crack formation and oxygen picking up. Electron beam powder bed fusion (EB-PBF) made feasible TiAl near net shape components, but the surfaces are particularly rough and present complex surface topographies. In this present investigation, experimental analysis and optimization are proposed for electro-chemical machining (ECM) on as-built Ti-48Al-2Nb-2Cr surfaces manufactured using EB-PBF. Experimental runs are performed under pulsed machining conditions and varying specific process metrics to understand the machining effects on the process efficiency and removal phenomena. In particular, the morphology and isotropy of the surface are studied before and after the machining by scanning electron and confocal microscopies. The results establish the optimal machining conditions and a range for the active machining time that produce, compared to the as-built surface, an extremely smooth and isotropy surface without any detrimental effect on the surface integrity and microstructure.

Author Information

Galati, Manuela
Department of Management and Production Engineering, Politecnico di Torino, Torino, Italy
Defanti, Silvio
Department of Engineering, Università di Modena e Reggio Emilia, Modena, Italy
Denti, Lucia
Department of Engineering, Università di Modena e Reggio Emilia, Modena, Italy
Pages: 15
Price: Free
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Stock #: SSMS20210041
ISSN: 2520-6478
DOI: 10.1520/SSMS20210041