Effect of Tool Geometry on the Machining Characteristics amid SiC Powder Mixed Electric Discharge Drilling of Hybrid Met
- PDF / 2,609,793 Bytes
- 19 Pages / 595.276 x 790.866 pts Page_size
- 25 Downloads / 197 Views
ORIGINAL PAPER
Effect of Tool Geometry on the Machining Characteristics amid SiC Powder Mixed Electric Discharge Drilling of Hybrid Metal Matrix Composite Rahul Davis 1
&
Abhishek Singh 1 & Fred Lacerda Amorim 2 & Mark James Jackson 3 & Wisley Falco Sales 4
Received: 26 May 2020 / Accepted: 6 October 2020 # Springer Nature B.V. 2020
Abstract The manufacturing of hybrid metal matrix composites (HMMCs) combines two or more reinforcing materials exhibiting distinct properties, with a steady metal matrix phase. Such combinations display improved mechanical properties and abilities to potentially satisfy the needs of progressive engineering applications. However, non-traditional machining techniques are required for the adequate subtractive manufacturing of HMMCs for the specific purposes. In this research, powder mixed electric discharge drilling (PM-EDD) of Al6063/ 5% SiC / 2.5% Gr / 2.5% Al2O3 HMMC was performed with tool electrodes of dissimilar geometries at 5 g/l silicon carbide (SiC) powder particle concentration. A set of solid conical and hollow cylindrical tool electrodes made up of quenched copper, were used in the present work. Discharge-current, duty-factor, tool-speed, and flushing-pressure were chosen to be the governing input control variables. The performances of the two tool electrodes were experimentally examined and compared in terms of material removal rate (MRR), tool wear rate (TWR), and surface roughness (SR) during PM-EDD of the HMMC. However, material removal rate (MRR) was considered to be the foremost benchmark for the comparative analysis of the two tool electrodes. An implementation of response surface methodology (RSM) was executed to optimize the responses. The hollow cylindrical tool electrode could achieve 33.79% higher MRR as compared to solid conical tool electrode. The results displayed that the discharge-current had the most remarkable influence on the PM-EDD process compared to other input control variables. Keywords Powder mixed-EDD . Siliconcarbide powder . Hybrid metal matrix composite . Material removal rate . Tool wear rate . Surface roughness
1 Introduction The parts made up of a composite material go through certain subtractive process(s) such as cutting and trimming before they get assembled to form a final composite product. A huge
* Rahul Davis [email protected] Abhishek Singh [email protected] Fred Lacerda Amorim [email protected]
competitiveness among the applications of high-quality engineering materials has displayed a tremendous progress in producing advanced or difficult to machine materials such as hybrid metal matrix composite (HMMC), which exhibits relatively higher stiffness, toughness and lighter weight
1
Department of Mechanical Engineering, National Institute of Technology Patna, Patna, India
2
Mechanical Engineering Graduate Program – PPGEM, Pontifícia Universidade Católica do Paraná – PUCPR, R. Imaculada Conceicao, 1155, Curitiba, PR 80215 901, Brazil
3
College of Technology and Aviation, Kansas State University, Salina, KS 6740
Data Loading...
