Investigation on material removal rate, surface and subsurface characteristics in wire electro discharge machining of Ti50Ni50-xCux shape memory alloy

M. Manjaiah, S. Narendranath, S. Basavarajappa, V. N. Gaitonde

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

TiNiCu shape memory alloys have superior properties as compared with NITINOL due to their greater ductility, reduced hysteresis temperature range, and quick actuation response. The present article investigates the surface and subsurface modifications occurring due to wire electro discharge machining of Ti50Ni50-xCux shape memory alloy. The machining experiments were performed considering the pulse on time, pulse off time, and servo voltage as the process parameters. The influence of these parameters was studied on the material removal rate, surface roughness, recast layer thickness, microhardness, and phase changes in the machined surface. Longer pulse on time causes greater discharge energy, hence leading to higher material removal rate, surface roughness, and recast layer thickness. The machined surface hardness increased up to 900 Hv, which is about 59% increase with respect to the base material for longer pulse on time due to the recast layer thickness and the formation of oxides. A phase change on the machined surface was observed to cause the shape recoverability of the alloy. The microstructure, composition through EDAX, and the phase changes of the machined surface are also discussed in the article.

Original languageEnglish
Pages (from-to)164-177
Number of pages14
JournalProceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
Volume232
Issue number2
DOIs
Publication statusPublished - 01-02-2018

Fingerprint

Electric discharge machining
Shape memory effect
Wire
Surface roughness
Microhardness
Oxides
Ductility
Hysteresis
Energy dispersive spectroscopy
Machining
Hardness
Microstructure
Electric potential
Chemical analysis
Experiments
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanical Engineering

Cite this

@article{77321ea12a9a4bcb98b061b8fa2f41e8,
title = "Investigation on material removal rate, surface and subsurface characteristics in wire electro discharge machining of Ti50Ni50-xCux shape memory alloy",
abstract = "TiNiCu shape memory alloys have superior properties as compared with NITINOL due to their greater ductility, reduced hysteresis temperature range, and quick actuation response. The present article investigates the surface and subsurface modifications occurring due to wire electro discharge machining of Ti50Ni50-xCux shape memory alloy. The machining experiments were performed considering the pulse on time, pulse off time, and servo voltage as the process parameters. The influence of these parameters was studied on the material removal rate, surface roughness, recast layer thickness, microhardness, and phase changes in the machined surface. Longer pulse on time causes greater discharge energy, hence leading to higher material removal rate, surface roughness, and recast layer thickness. The machined surface hardness increased up to 900 Hv, which is about 59{\%} increase with respect to the base material for longer pulse on time due to the recast layer thickness and the formation of oxides. A phase change on the machined surface was observed to cause the shape recoverability of the alloy. The microstructure, composition through EDAX, and the phase changes of the machined surface are also discussed in the article.",
author = "M. Manjaiah and S. Narendranath and S. Basavarajappa and Gaitonde, {V. N.}",
year = "2018",
month = "2",
day = "1",
doi = "10.1177/1464420715619949",
language = "English",
volume = "232",
pages = "164--177",
journal = "Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications",
issn = "1464-4207",
publisher = "SAGE Publications Ltd",
number = "2",

}

TY - JOUR

T1 - Investigation on material removal rate, surface and subsurface characteristics in wire electro discharge machining of Ti50Ni50-xCux shape memory alloy

AU - Manjaiah, M.

AU - Narendranath, S.

AU - Basavarajappa, S.

AU - Gaitonde, V. N.

PY - 2018/2/1

Y1 - 2018/2/1

N2 - TiNiCu shape memory alloys have superior properties as compared with NITINOL due to their greater ductility, reduced hysteresis temperature range, and quick actuation response. The present article investigates the surface and subsurface modifications occurring due to wire electro discharge machining of Ti50Ni50-xCux shape memory alloy. The machining experiments were performed considering the pulse on time, pulse off time, and servo voltage as the process parameters. The influence of these parameters was studied on the material removal rate, surface roughness, recast layer thickness, microhardness, and phase changes in the machined surface. Longer pulse on time causes greater discharge energy, hence leading to higher material removal rate, surface roughness, and recast layer thickness. The machined surface hardness increased up to 900 Hv, which is about 59% increase with respect to the base material for longer pulse on time due to the recast layer thickness and the formation of oxides. A phase change on the machined surface was observed to cause the shape recoverability of the alloy. The microstructure, composition through EDAX, and the phase changes of the machined surface are also discussed in the article.

AB - TiNiCu shape memory alloys have superior properties as compared with NITINOL due to their greater ductility, reduced hysteresis temperature range, and quick actuation response. The present article investigates the surface and subsurface modifications occurring due to wire electro discharge machining of Ti50Ni50-xCux shape memory alloy. The machining experiments were performed considering the pulse on time, pulse off time, and servo voltage as the process parameters. The influence of these parameters was studied on the material removal rate, surface roughness, recast layer thickness, microhardness, and phase changes in the machined surface. Longer pulse on time causes greater discharge energy, hence leading to higher material removal rate, surface roughness, and recast layer thickness. The machined surface hardness increased up to 900 Hv, which is about 59% increase with respect to the base material for longer pulse on time due to the recast layer thickness and the formation of oxides. A phase change on the machined surface was observed to cause the shape recoverability of the alloy. The microstructure, composition through EDAX, and the phase changes of the machined surface are also discussed in the article.

UR - http://www.scopus.com/inward/record.url?scp=85041036692&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041036692&partnerID=8YFLogxK

U2 - 10.1177/1464420715619949

DO - 10.1177/1464420715619949

M3 - Article

VL - 232

SP - 164

EP - 177

JO - Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications

JF - Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications

SN - 1464-4207

IS - 2

ER -