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An experimental study of influence of wire electro discharge machining parameters on surface integrity of TiNiCo shape memory alloy

Published online by Cambridge University Press:  20 April 2017

Hargovind Soni ,
Narendranath Sannayellappa  and
Ramesh Motagondanahalli Rangarasaiah
Hargovind Soni*
Affiliation:
Department of Mechanical Engineering, National Institute of Technology, Karnataka 575025, India
Narendranath Sannayellappa
Affiliation:
Department of Mechanical Engineering, National Institute of Technology, Karnataka 575025, India
Ramesh Motagondanahalli Rangarasaiah
Affiliation:
Department of Mechanical Engineering, National Institute of Technology, Karnataka 575025, India
*
a) Address all correspondence to this author. e-mail: hargovindsoni2002@gmail.com
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Abstract

Shape memory alloys (SMAs) are unique class of smart materials with excellent physical, mechanical and biomedical properties, which have wide applications in several fields such as aerospace, robotics, biomedical, and dental etc. These alloys are well known for exhibiting shape memory effect (SME) and pseudoelasticity (PE), it is a well-established fact that they are required to be processed into functioning parts. The conventional machining affects the internal properties of shape memory alloys and hence, it is reported that nonconventional machining techniques are more suitable. Wire electro discharge machining (WEDM) is one of the nonconventional machining processes for machining complicated shapes without hampering the internal properties of such type of materials. In the present experimental investigation, wire electro discharge machining of Ti50Ni40Co10 shape memory alloy (SMA) has been carried out and machining performances such as surface roughness (SR), and material removal rate (MRR) have been evaluated. Experimental results exposed that pulse on time, pulse off time and servo voltages are most influential process parameters on the responses. The machined surface has been characterised with respect to microstructure, microhardness, and phases formed.

Keywords

W-EDMshape memory alloySEMXRD
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 16 , 28 August 2017 , pp. 3100 - 3108
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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