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Evaluation of wire electro discharge machining characteristics of Ti50Ni50−xCux shape memory alloys

Published online by Cambridge University Press:  18 May 2016

Mallaiah Manjaiah ,
Rudolph Frans Laubscher ,
Sannayellapa Narendranath ,
Sathyappa Basavarajappa  and
Vinayak Neelakanth Gaitonde
Mallaiah Manjaiah*
Affiliation:
Department of Mechanical Engineering Science, University of Johannesburg, Kingsway Campus, Johannesburg-2006, South Africa
Rudolph Frans Laubscher
Affiliation:
Department of Mechanical Engineering Science, University of Johannesburg, Kingsway Campus, Johannesburg-2006, South Africa
Sannayellapa Narendranath
Affiliation:
Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal-575025, India
Sathyappa Basavarajappa
Affiliation:
Department of Studies in Mechanical Engineering, University B.D.T. College of Engineering, Davangere-577004, Karnataka, India
Vinayak Neelakanth Gaitonde
Affiliation:
Department of Industrial and Production Engineering, B. V. B. College of Engineering and Technology, Hubli-580031, Karnataka, India
*
a)Address all correspondence to this author. e-mail: manjaiahgalpuji@gmail.com
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Abstract

The machining of shape memory alloys (SMAs) is fairly essential and integral part in the manufacture of components for utilizing in engineering applications. An effort has been made in the present work to study the effect of wire electro discharge machining process parameters such as pulse on time (Ton), pulse off time (Toff) and servo voltage (SV) have been analyzed on material removal rate and surface roughness. The investigation clearly reveals that an increased pulse on time with decrease in pulse off time as well as SV increases the amount of material removed in machining of SMAs. On the other hand, the surface roughness increases with increased pulse on time and decreases with increased pulse off time as well as SV. The surface topography of the machined surface was analyzed using scanning electron microscope (SEM) and confocal micrographs. Phase changes on the machined surface with respect to pulse on time and SV were evaluated from X-ray diffractometer (XRD) analysis.

Keywords

TiNiCu shape memory alloysmaterial removal ratesurface roughnesssurface topographyXRDdesign of experiments
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 12 , 28 June 2016 , pp. 1801 - 1808
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Copyright
Copyright © Materials Research Society 2016 

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References

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