Effect of MoS2 Powder-Mixed Electric Discharge Alloying on the Tribological Performance of Ti6Al4V

• Published in: Transactions of the Indian Institute of Metals 2023-09, Vol.76 (9), p.2363-2375
• Main Authors: Sudheer, Renumala, Reddy, M. Venkata Krishna, Joshy, Jino, Kuriachen, Basil, Joy, M. L.
• Format: Article
• Language: English
• Subjects: Abrasive wear; Alloy powders; Chemistry and Materials Science; Coefficient of friction; Corrosion and Coatings; Electric discharge machining; Lubricants; Material removal rate (machining); Materials Science; Metallic Materials; Molybdenum disulfide; Original Article; Titanium base alloys; Tool wear; Tribology; Wear mechanisms; Wear rate; Wear resistance
• ISSN: 0972-2815; 0975-1645
• DOI: 10.1007/s12666-022-02786-0

In the present work, powder-mixed electrical discharge machining (PMEDM) experiments of Ti6Al4V alloy with molybdenum disulfide (MoS 2 ) powders at three levels of concentrations and at three levels of pulse on time ( T on ) have been performed. The maximum material removal rate observed was 0.006966 gm/min with the MoS 2 powder at 2 gm/L powder concentration, 15 µs T on , and the minimum tool wear rate (TWR) was 0.000147 gm/min at 3 gm/L and 15 µs T on . Pin-on-disk experiments were carried out at 50 N load and 1 m/s sliding velocity. MoS 2 powder specimens had shown more wear resistance and less coefficient of friction. The wear resistance of Ti6Al4V after PMEDM using MoS 2 powder increased by 40.143% at 2 gm/L powder concentration and 40 µs T on . The tribological performance was enhanced by using powders because these powders act as self-lubricant. Abrasive and delamination wear was the predominant wear mechanisms observed on the worn surface.