Resistance Microwelding of Ti-55.8 wt pct Ni Nitinol Wires and the Effects of Pseudoelasticity

Tam, Billy; Pequegnat, A.; Khan, Muhammad; Zhou, Yunhong

doi:10.1007/s11661-012-1115-7

Cited by 38 publications

(22 citation statements)

References 20 publications

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“…Basic research on micro-resistance welding (MRW) was performed by Tam et al [40] especially in crossed wires of 0.5 mm diameter. The group studied the bonding mechanisms as well as the mechanical properties, the microstructural features and phase transformations.…”

Section: U N C O R R E C T E D P R O O Fmentioning

confidence: 99%

Welding and Joining of NiTi Shape Memory Alloys: A Review

Oliveira

Miranda

Fernandes

2017

Progress in Materials Science

285

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Section: U N C O R R E C T E D P R O O Fmentioning

confidence: 99%

Welding and Joining of NiTi Shape Memory Alloys: A Review

Oliveira

Miranda

Fernandes

2017

Progress in Materials Science

285

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“…% HF, 20 vol. % HNO 3 , bal H 2 O, to ensure quality joints [24]. This process reduced the average diameter of the wire to 0.37 mm.…”

Section: Materials Welding and Heat Treatmentmentioning

confidence: 99%

Thermomechanical fatigue of post-weld heat treated NiTi shape memory alloy wires

Panton

Oliveira

Zeng

et al. 2016

International Journal of Fatigue

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“…These peaks of resistance ( Fig 2 ) were at the power 4 for the GI and GII groups, and 3.5 for GIII group. The resistance decrease with higher power levels occurred because the heat produced by the weld causes annealing of the wire 10 , which is sufficient to significantly alter its mechanical properties and sometimes even break the wire, as occurred in the wires of the GIII group when welded at power levels higher than 4 (and therefore were not used in this study). The difference of power levels that obtained the highest resistance for each group can be explained by variations in the manufacturing process of the wires, which may be due to its composition, as the nickel percentage can vary, 12 or due to the tested welding machine setting and cooking processes.…”

Section: Discussionmentioning

confidence: 99%

Welding strength of NiTi wires

Mesquita

Martins

2018

Dental Press J. Orthod.

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Objective: To identify the appropriate power level for electric welding of three commercial brands of nickel-titanium (NiTi) wires. Methods: Ninety pairs of 0.018-in and 0.017 × 0.025-in NiTi wires were divided into three groups according to their manufacturers - GI (Orthometric, Marília, Brazil), GII (3M OralCare, St. Paul, CA) and GIII (GAC,York, PA) - and welded by electrical resistance. Each group was divided into subgroups of 5 pairs of wires, in which welding was done with different power levels. In GI and GII, power levels of 2.5, 3, 3.5, 4, 4.5 and 5 were used, while in GIII 2.5, 3, 3.5 and 4 were used (each unit of power of the welding machine representing 500W). The pairs of welded wires underwent a tensile strength test on an universal testing machine until rupture and the maximum forces were recorded. Analysis of variance (ANOVA) and post-hoc tests were conducted to determine which subgroup within each brand group had the greatest resistance to rupture. Results: The 2.5 power exhibited the lowest resistance to rupture in all groups (43.75N for GI, 28.41N for GII and 47.57N for GIII) while the 4.0 power provided the highest resistance in GI and GII (97.90N and 99.61N, respectively), while in GIII (79.28N) the highest resistance was achieved with a 3.5 power welding. Conclusions: The most appropriate power for welding varied for each brand, being 4.0 for Orthometric and 3M, and 3.5 for GAC NiTi wires.

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Resistance Microwelding of Ti-55.8 wt pct Ni Nitinol Wires and the Effects of Pseudoelasticity

Cited by 38 publications

References 20 publications

Welding and Joining of NiTi Shape Memory Alloys: A Review

Welding and Joining of NiTi Shape Memory Alloys: A Review

Thermomechanical fatigue of post-weld heat treated NiTi shape memory alloy wires

Welding strength of NiTi wires

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