Cover Page September-2011-Advanced Materials Letters

Advanced Materials Letters

Volume 2, Issue 3, Pages 222-226, September 2011
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Machining characteristics of nanocomposites

K.S. Umashankar1, K.V. Gangadharan1, Vijay Desai1, B. Shivamurthy2*

1Department of Mechanical Engineering, National Institute of Technology, Surathkal 575025, Karnataka, India

2Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology (A Constituent Institute of Manipal University), Manipal 576104, Karnataka, India

Adv. Mater. Lett., 2011, 2 (3), pp 222-226

DOI: 10.5185/amlett.2011.1209

Publication Date (Web): Apr 08, 2012

E-mail: b_shivamurthy@yahoo.co.in

Abstract

Nanocomposites were prepared with Al/Al-Si alloys (LM 6 and LM 25) as matrix and multi-wall carbon nanotube (MWNT) of 0.25, 0.5, 0.75, 1.0 and 1.5 wt. % as reinforcement through powder metallurgy (PM) followed by sintering and hot extrusion techniques. Fabricated nanocomposites were machined on a Panther 1530/1650 lathe by using tungsten carbide tool. Recurrence quantification analysis (RQA) was used to study the machining characteristics by using cutting force signal stability. Highest value of determinism (DET-one of the RQA parameter) was observed for 0.5 wt.% MWNT reinforced Al and Al-Si nanocomposites. This attributes better machining characteristic due uniformity of the signals. Also it is observed better mechanical properties at 0.5 wt.% reinforced nanocomposite and further reinforcement deteriorate the machinability and mechanical properties.

Keywords

Aluminum, carbon nanotube, machining, recurrence plot, RQA

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