Surface modification of TiNi-based shape memory alloys by dry electrical discharge machining

Huang, Tyau-Song; Hsieh, Shu-Feng; Chen, Sung-Long; Lin, Ming-Hong; Ou, Shih-Fu; Chang, Wei-Tse

doi:10.1016/j.jmatprotec.2015.02.025

Cited by 56 publications

(20 citation statements)

References 29 publications

(32 reference statements)

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“…It was determined that the surface roughness value increased as the feed rate of both cutting tools increased. These findings coincide with those in the literature [24,42,[70][71][72][73][74]. The decrease in surface roughness depending on the increase in the nose radius is an expected result theoretically (Equation 1) and increasing the nose radius to obtain lower surface roughness value is in line with the literature [38-45, 52-55, 70-72].…”

Section: Change In Surface Roughness Due To Cutting Speed and Feed Ratesupporting

confidence: 92%

“…The NiTi alloy is in martensitic phase at low temperatures and in the austenitic phase at high temperatures [4]. A review of the literature showed that different manufacturing processes are used for the machining of NiTi alloy such as laser processing method [5][6][7][8][9][10][11][12][13][14][15][16], electrical discharge machining (EDM) [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31], electrochemical polishing [32] and abrasive water jet processing method (AWJM) [33,34] for shaping NiTi alloy and also conventional machining methods (Turning [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50], milling…”

Section: Introductionmentioning

confidence: 99%

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Investigation Of The Effects Of Machining Parameters On Tool Life And Surface Roughness During The Face Milling Of The NiTi Shape Memory Alloy With Uncoated Tools

Altaş¹,

Gökkaya²,

Özkan³

2020

Preprint

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Shape memory alloys (SMAs) are increasingly used in the fields of aviation, automotive and biomedicine due to their unique properties. Nickel-Titanium (NiTi) alloy materials, which are one of the shape memory alloys, are among the most frequently used alloy materials. The shape memory and super elastic effects of NiTi alloys, high ductility and deformation hardening make it difficult to shape burr. An additional problem is the formation of a white layer during machining. In this study, surface milling operations were performed in dry cutting conditions with uncoated cutting tools with different nose radii. The processing parameters were determined based on the experience gained as a result of the preliminary tests. Tungsten carbide cutting tools with different nose radii (0.4mm and 0.8mm) were used for the milling operations. Milling was carried out at three different cutting speeds (20, 35, 50 m/min), feed rates (0.03, 0.07, 0.14 mm/tooth), and a constant axial cutting depth (0.7 mm). As a result of our experimental studies, the best tool life was found to be in 0.8 mm nose radius cutting tools at 20 m/min cutting speed and 0.03 mm/tooth feed rate (0.264 mm). The minimum average surface roughness was found after milling with 0.8 mm nose radius cutting tool at 20 m/min cutting speed and 0.03 mm/tooth feed rate (0.346 μm). It has been determined that increasing the cutting tool nose radius reduces both the flank wear over the cutting tool and the average surface roughness.

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Section: Change In Surface Roughness Due To Cutting Speed and Feed Ratesupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Investigation Of The Effects Of Machining Parameters On Tool Life And Surface Roughness During The Face Milling Of The NiTi Shape Memory Alloy With Uncoated Tools

Altaş¹,

Gökkaya²,

Özkan³

2020

Preprint

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“…During dry EDM, the debris in the machining gap can be easily removed, thereby overcoming the problem of its reattachment to the electrodes surfaces. Huang et al [149] reported the use of nitrogen gas as the dielectric fluids. A nanostructured surface in the form of TiN and CrN with extreme hardness and excellent adhesion was found.…”

Section: Gaseous Additives (Dry Edm)mentioning

confidence: 99%

“…Although a hard and adhesive recast layer is expected to enhance the corrosion and wear resistance of the metallic implant, a thick recast layer should be avoided or polished, to reduce the risk of the implant mechanical failure [149]. The recast layer thickness largely depends on the dielectric fluid type, the pulse-on time, and the powder concentration [11,38].…”

Section: Formation and Influence Of Recast Layer On Edmedmentioning

confidence: 99%

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

Aliyu

Rani

Ginta

et al. 2017

Advances in Materials Science and Engineering

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Surface treatment remained a key solution to numerous problems of synthetic hard tissues. The basic methods of implant surface modification include various physical and chemical deposition techniques. However, most of these techniques have several drawbacks such as excessive cost and surface cracks and require very high sintering temperature. Additive mixed-electric discharge machining (AM-EDM) is an emerging technology which simultaneously acts as a machining and surface modification technique. Aside from the mere molds, dies, and tool fabrication, AM-EDM is materializing to finishing of automobiles and aerospace, nuclear, and biomedical components, through the concept of material migrations. The mechanism of material transfer by AM-EDM resembles electrophoretic deposition, whereby the additives in the AM-EDM dielectric fluids are melted and migrate to the machined surface, forming a mirror-like finishing characterized by extremely hard, nanostructured, and nanoporous layers. These layers promote the bone in-growth and strengthen the cell adhesion. Implant shaping and surface treatment through AM-EDM are becoming a key research focus in recent years. This paper reports and summarizes the current advancement of AM-EDM as a potential tool for orthopedic and dental implant fabrication. Towards the end of this paper, the current challenges and future research trends are highlighted.

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“…Huang et al[9] investigated the surface properties of Ti 50 Ni 50 andTi 50 Ni 49.5 Cr 0.5 SMAs in dry EDM. They have used nitrogen gas as a dielectric.…”

mentioning

confidence: 99%

A Study on Dry Electrical Discharge Machining

Prasanna¹

2016

IJRET

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Surface modification of TiNi-based shape memory alloys by dry electrical discharge machining

Cited by 56 publications

References 29 publications

Investigation Of The Effects Of Machining Parameters On Tool Life And Surface Roughness During The Face Milling Of The NiTi Shape Memory Alloy With Uncoated Tools

Investigation Of The Effects Of Machining Parameters On Tool Life And Surface Roughness During The Face Milling Of The NiTi Shape Memory Alloy With Uncoated Tools

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

A Study on Dry Electrical Discharge Machining

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