The machining characteristics and shape recovery ability of Ti–Ni–X (X=Zr, Cr) ternary shape memory alloys using the wire electro-discharge machining

Hsieh, Shu-Feng; Chen, S.L.; Lin, Hung-Yin; Lin, Ming-Hong; Chiou, Shi Yung

doi:10.1016/j.ijmachtools.2008.12.013

Cited by 87 publications

(37 citation statements)

References 28 publications

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“…Material removal rate also increases with increase in working energy [2]. Similar results are reported when WEDM is considered [3]. NiTi alloys are sensitive to thermal influence and it is of interest to reduce the effect of excessive thermal loading when laser machining components made of SMAs.…”

Section: Electrodischarge Machining Versus Millingsupporting

confidence: 71%

The New View towards EDM Files

Maiti¹

2017

OAJDS

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With continuous evolution of NiTi file system it has become a challenge to choose between the right system for individual clinical scenario. The various thermomechanic procedures and the improvement of composition of the alloy that is used in manufacturing NiTi files are aimed to improve the flexibility of NiTi files. Improved flexibility of NiTi files would minimize the intracanal irregularities such as canal transportation and would ensure an increase in the success of root canal therapy. Technically speaking there is a phase shift from milling of alloy to electro discharge machining of alloy.Electro-discharge machining (EDM) is a non-contact thermal erosion process that partially melts and evaporates the wire by high-frequency spark discharges. There is significant difference in surface architecture of nickel titanium after thermal treatment. Electro discharge machining gives better fatigue resistance property hence more predictable outcome.

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Section: Electrodischarge Machining Versus Millingsupporting

confidence: 71%

The New View towards EDM Files

Maiti¹

2017

OAJDS

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“…Converted layer is not much affected during WEDM process hence hardness was almost constant in this zone. Such kind of variation in hardness were noticed by Hsieh et al 21,23 during the electro discharge machining of TiNiZr and TiAlfe alloys.…”

Section: E Microhardness Analysismentioning

confidence: 89%

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

2017

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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 Ti 50 Ni 40 Co 10 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.

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“…5) formed on the recast layer during EDM. Hsieh et al (2009) concluded that after wire EDMed in distilled water, the surface hardness of TiNiZr alloy increase from 320 Hv to 980 Hv and it is attributed to the formation of TiO 2 , TiNiO 3 , ZrO 2 and the deposition debris in the recast layer. Lin et al (2001) proved that the hardness of EDMed TiNiCu alloy increased from the inner to surface machined surface.…”

Section: Surface Mechanical Properties Of Tini-based Smas After Edmmentioning

confidence: 97%

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

Huang

Hsieh

Chen

et al. 2015

Journal of Materials Processing Technology

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The machining characteristics and shape recovery ability of Ti–Ni–X (X=Zr, Cr) ternary shape memory alloys using the wire electro-discharge machining

Cited by 87 publications

References 28 publications

The New View towards EDM Files

The New View towards EDM Files

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

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

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