Flexural, Dry Sliding Wear and Machinability (EDM) Characteristics of AZ91D/TiC (0, 5, 10, 15, & 20 wt%) MMCs

ABSTRACT

Weight saving and increase in strength of the material is a challenge for engineers in the automobile sector and aerospace industry. Here, an attempt has been made to analyse the flexural, wear and machinability behaviour of Mg/TiC composites. The optical microscope (OM), SEM, and X-Ray mapping (XRM) were used to determine any defect in the void, distribution and presence and elemental mapping of TiC within the composites. The results of the three-point flexural test show that the maximum flexural strength and flexural strain are obtained at AZ91D/20% TiC composite. The wear test result indicates that with the rise in sliding speed, the wear rate of composites is decreased. The response of EDM machining parameters, such as material removal rate (MRR) and surface roughness (SR), was determined by using both experimental and Taguchi Method. The maximum MRR was obtained at pulse-on time 200 μs, pulse-off time 11 μs, input current 8 amps and 15 wt% of TiC-reinforced Mg alloy. It is also observed that the experimental result of SR is more significant than the predicted value obtained from Taguchi Method.

KEYWORDS:

• MMCs
• magnesium alloy
• TiC reinforcement
• SEM
• flexural strength
• wear rate
• MRR
• SR
• Taguchi method

Disclosure statement

No potential conflict of interest was reported by the authors.