Next Article in Journal / Special Issue
Sustainable Ecocements: Chemical and Morphological Analysis of Granite Sawdust Waste as Pozzolan Material
Previous Article in Journal
SPR Effect Controlled by an Electric Field in a Tapered Optical Fiber Surrounded by a Low Refractive Index Nematic Liquid Crystal
Previous Article in Special Issue
SLM Manufacturing Redesign of Cooling Inserts for High Production Steel Moulds and Benchmarking with Other Industrial Additive Manufacturing Strategies
Article

Effect of WEDM Process Parameters on Surface Morphology of Nitinol Shape Memory Alloy

1
Department of Mechanical Engineering, School of Technology, Pandit Deendayal Petroleum University, Raisan, Gandhinagar 382007, India
2
School of Material Science and Engineering, Northwestern Polytechnical University, Shaanxi 710072, China
3
Department of Engineering Science, Division of Welding Technology, University West, 46186 Trollhättan, Sweden
4
Department of Mechanical Engineering, University of the Basque Country, Escuela Superior de Ingenieros Alameda de Urquijo s/n., 48013 Bilbao, Spain
*
Author to whom correspondence should be addressed.
Materials 2020, 13(21), 4943; https://doi.org/10.3390/ma13214943
Received: 30 September 2020 / Revised: 29 October 2020 / Accepted: 31 October 2020 / Published: 3 November 2020
(This article belongs to the Special Issue Special Issue of Manufacturing Engineering Society-2020 (SIMES-2020))
Nickel–titanium shape memory alloys (SMAs) have started becoming popular owing to their unique ability to memorize or regain their original shape from the plastically deformed condition by means of heating or magnetic or mechanical loading. Nickel–titanium alloys, commonly known as nitinol, have been widely used in actuators, microelectromechanical system (MEMS) devices, and many other applications, including in the biomedical, aerospace, and automotive fields. However, nitinol is a difficult-to-cut material because of its versatile specific properties such as the shape memory effect, superelasticity, high specific strength, high wear and corrosion resistance, and severe strain hardening. There are several challenges faced when machining nitinol SMA with conventional machining techniques. Noncontact operation of the wire electrical discharge machining (WEDM) process between the tool (wire) and workpiece significantly eliminates the problems of conventional machining processes. The WEDM process consists of multiple input parameters that should be controlled to obtain great surface quality. In this study, the effect of WEDM process parameters on the surface morphology of nitinol SMA was studied using 3D surface analysis, scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) analysis. 3D surface analysis results indicated a higher value of surface roughness (SR) on the top of the work surface and a lower SR on the bottom portion of the work surface. The surface morphology of the machined sample obtained at optimized parameters showed a reduction in microcracks, micropores, and globules in comparison with the machined surface obtained at a high discharge energy level. EDX analysis indicated a machined surface free of molybdenum (tool electrode). View Full-Text
Keywords: shape memory alloy; nitinol; WEDM; shape memory effect; surface morphology; molybdenum tool wire shape memory alloy; nitinol; WEDM; shape memory effect; surface morphology; molybdenum tool wire
Show Figures

Figure 1

MDPI and ACS Style

Chaudhari, R.; Vora, J.J.; Patel, V.; Lacalle, L.N.L.d.; Parikh, D.M. Effect of WEDM Process Parameters on Surface Morphology of Nitinol Shape Memory Alloy. Materials 2020, 13, 4943. https://doi.org/10.3390/ma13214943

AMA Style

Chaudhari R, Vora JJ, Patel V, Lacalle LNLd, Parikh DM. Effect of WEDM Process Parameters on Surface Morphology of Nitinol Shape Memory Alloy. Materials. 2020; 13(21):4943. https://doi.org/10.3390/ma13214943

Chicago/Turabian Style

Chaudhari, Rakesh, Jay J. Vora, Vivek Patel, L. N.L.d. Lacalle, and D. M. Parikh 2020. "Effect of WEDM Process Parameters on Surface Morphology of Nitinol Shape Memory Alloy" Materials 13, no. 21: 4943. https://doi.org/10.3390/ma13214943

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop