Laser weldability of Pt and Ti alloys

Noolu, N.J.; Kerr, H. W.; Zhou, Yang; Xie, Junfei

doi:10.1016/j.msea.2004.12.044

Cited by 34 publications

(20 citation statements)

References 4 publications

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“…Therefore, LMW has been widely applied to manufacturing various medical products such as pacemakers, defibrillators, catheters, cochlear implants, insulin pumps, stents, and orthopedic implants. [11,12] The excellent corrosion resistance, biocompatibility, conductivity, and mechanical properties of Pt alloys and 316 LVM SS make them attractive for biomedical applications. For example, 316 LVM SS is used for wires, stents, batteries, and capacitor cases, while Pt and Pt alloys are used for coils, electrodes, and pins in electronic medical devices.…”

mentioning

confidence: 99%

“…For example, 316 LVM SS is used for wires, stents, batteries, and capacitor cases, while Pt and Pt alloys are used for coils, electrodes, and pins in electronic medical devices. [11,12] In recent years, several researchers reported both the LMW of Pt-Ir to Ti-6Al-4V alloy, the 316 LVM wire to itself, and the RMW of pure Pt to 316 LVM SS sheet. [10,12,13] The laser weldability of Pt-Ir to Ti alloy was found to be poor due to the formation of brittle intermetallic compounds such as Ti 3 Pt and TiPt resulting in cracking.…”

mentioning

confidence: 99%

“…[11,12] In recent years, several researchers reported both the LMW of Pt-Ir to Ti-6Al-4V alloy, the 316 LVM wire to itself, and the RMW of pure Pt to 316 LVM SS sheet. [10,12,13] The laser weldability of Pt-Ir to Ti alloy was found to be poor due to the formation of brittle intermetallic compounds such as Ti 3 Pt and TiPt resulting in cracking. [12] Strong and smooth joints were made with 316 LVM wires under optimal laser energy input.…”

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Crossed-Wire Laser Microwelding of Pt-10 Pct Ir to 316 Low-Carbon Vacuum Melted Stainless Steel: Part I. Mechanism of Joint Formation

Zou

Huang

Pequegnat

et al. 2011

Metall Mater Trans A

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The excellent biocompatibility and corrosion properties of Pt alloys and 316 low-carbon vacuum melted (LVM) stainless steel (SS) make them attractive for biomedical applications. With the increasing complexity of medical devices and in order to lower costs, the challenge of joining dissimilar materials arises. In this study, laser microwelding (LMW) of crossed Pt-10 pct Ir to 316 LVM SS wires was performed and the weldability of these materials was determined. The joint geometry, joining mechanism, joint breaking force (JBF), and fracture modes were investigated using optical microscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and microtensile testing. It was shown that the mechanisms of joint formation transitioned from (1) brazing, (2) a combination of brazing and fusion welding, and (3) fusion welding with increasing pulsed laser energy. The joints demonstrated various tensile failure modes including (1) interfacial failure below a peak power of 0.24 kW, (2) partial interfacial failure that propagated into the Pt-Ir wire, (3) failure in the Pt-Ir wire, and (4) failure in the SS wire due to porosity and severe undercutting caused by overwelding. During this study, the optimal laser peak power range was identified to produce joints with good joint geometry and 90 pct of the tensile strength of the Pt-10 pct Ir wire.

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Crossed-Wire Laser Microwelding of Pt-10 Pct Ir to 316 Low-Carbon Vacuum Melted Stainless Steel: Part I. Mechanism of Joint Formation

Zou

Huang

Pequegnat

et al. 2011

Metall Mater Trans A

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“…Common materials that meet these requirements include 316 low-carbon vacuum melted (LVM) stainless steel (SS), titanium, niobium, NitinolTM, nickel-cobalt alloys such as MP35NTM and KovarTM, platinum, and platinum-iridium alloys [1]. The excellent mechanical properties and electrical conductivity of Pt alloys and 316 LVM SS make them ideal for biomedical applications including electrical terminals, wires, coils, and electrodes [2]. With the increasing complexity of medical devices and a constant drive for lower costs, the challenge of joining dissimilar biocompatible materials is presented.…”

Section: Introductionmentioning

confidence: 99%

Study on joint formation evolution in laser microwelding of Pt-10%Ir and 316 LVM SS crossed wiresCrossed wire, Laser microwelding, Simulation, Joint formation

Mao¹,

Huang²,

He³

2016

Proceedings of the International Symposium on Mechanical Engineering and Material Science

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Abstract. In order to identify the evolution of joint formation about crossed wires of Pt-10% Ir to 316 LVM SS in laser microwelding, the experimental and computational study was carried out. The results showed that, with the increase of peak power of laser microwelding, the laser joint evolution of the crossed-wires appears a transition from a laser braze to a fusion weld. The simulation of joint was agreed with the experimental results.

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“…On the other hand, manufacturing of medical devices in many instances requires joining a material to itself and to other dissimilar materials. For example, laser welding and diffusion bonding have been reported to join Co-Cr alloy [4], Ti-6Al-4V alloy-to-Pt [5], Ti-6Al-4V-to-AISI 316L [6] for the fabrication of metal frameworks and other devices in medical applications.…”

Section: Introductionmentioning

confidence: 99%

Joint formation mechanism and strength in resistance microwelding of 316L stainless steel to Pt wire

Chen

2007

J Mater Sci

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Resistance microwelding of 316L stainless steel to Pt wire has been performed. The interfacial metallurgical phenomena, joint breaking force and fracture mode were investigated using scanning electron microscopy, energy-dispersive X-ray spectroscopy and tensile-shear testing. The results showed that a solid-state bonding was achieved at the interface when the welding current was low and/or the weld time was short, whereas a bonding with fusion of materials was observed at high welding current. Melting of the stainless steel was more significant than that of the Pt wire.

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Laser weldability of Pt and Ti alloys

Cited by 34 publications

References 4 publications

Crossed-Wire Laser Microwelding of Pt-10 Pct Ir to 316 Low-Carbon Vacuum Melted Stainless Steel: Part I. Mechanism of Joint Formation

Crossed-Wire Laser Microwelding of Pt-10 Pct Ir to 316 Low-Carbon Vacuum Melted Stainless Steel: Part I. Mechanism of Joint Formation

Study on joint formation evolution in laser microwelding of Pt-10%Ir and 316 LVM SS crossed wiresCrossed wire, Laser microwelding, Simulation, Joint formation

Joint formation mechanism and strength in resistance microwelding of 316L stainless steel to Pt wire

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