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Fibre and Disc Continuous-Wave Laser Source Micro Welding

Back to Core Research Programme 33632-2021-review-of-materials-am-and-nde-considerations-for-functionally-graded-materials 34236-2023-literature-review-on-the-potential-use-of-non-destructive-testing-techniques-for-residual-stress-measurement 34241-2023-artificial-intelligence-for-ndt-scanning-of-unknown-geometries-using-collaborative-robots 34459-2022-friction-stir-welding-of-pressure-vessel-liners-for-the-storage-and-transportation-of-hydrogen 34727-2023-techniques-for-high-temperature-ultrasonic-inspection-of-arc-welding-state-of-the-art-review 34793-2023-update-on-literature-reviews-for-wire-fed-additive-manufacturing 34847-2023-Literature-review-on-crack-length-measurement-techniques-on-environmental-fracture-toughness-tests 35268-2024-Literature-review-on-dual-sensing-applications-for-SHM-of-pipelines 32221-2020-hybrid-composite-to-metal-joining 32893-2020-mechanical-fastener-coatings-for-corrosion-protection 33557-2020-extreme-high-speed-laser-application-ehla-coatings 33557-2020-extreme-high-speed-laser-application-ehla-coatings 33557-2020-extreme-high-speed-laser-application-ehla-coatings 33557-2020-review-of-electric-vehicle-battery-joining-methods-and-testing 34250-2022-thermoplastic-materials-compatibility-for-hydrogen-service A Review of High Power, In-Vacuum and Narrow Gap Laser Welding Processes for Thick Section Welding A Review of High Productivity Additive Manufacture Using a Hybrid Laser-Arc Deposition (HLAD) Process A Review of Micro Welding with Fibre and Disc Continuous-Wave Laser Sources A Review of Residual Stress Measurement Techniques Used for Components Produced Using the Selective Laser Melting Process A Review of the Machine GTAW Ambient Temperature Temper Bead Repair Technique for Nuclear Power Plant Components A Review of Weld Repairs of Mar-M247 and Similar Alloys Applications, Modelling and Manufacturing Processes for Perforated Composites - Literature Review Butt Fusion Welding Procedures and Test Methods Used for PE Pipes Duplex Stainless Steel Welding – A Review of Current Practices Elastic Follow-Up in the Context of Fracture Assessment Flaw Sizing Techniques Using Guided Waves Flaw Sizing Techniques Using Guided Waves Flaw Sizing Techniques Using Guided Waves In-Bore Multi-Positional Laser Welding In-Process Monitoring of Arc Welding for Quality and Defect Detection Mechanical Fastening Technologies for Steel to Aluminium Joining in Automotive Manufacture Process Capability Study for Friction Stir Spot Welding (FSSW) Resistance Spot Welding with Transition Discs – A Review of Dissimilar Joining Using Transition Materials with Specific Reference to Resistance Spot Welding Review of Process Simulations for Metal Additive Manufacturing Surface Modification and Micro-Machining with Pulsed-Laser Sources Wire Fed Electron Beam Additive Manufacture – A State-of-the-Art Review
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TWI Technical Literature Review 23066

By Paola De Bono


'Micro laser welding' of monometallic and bimetallic joints is a very active field of investigation within the scientific community. A comprehensive literature review has been carried out to clarify the work performed to date. Focus has been directed to a range of materials (thin sheets and foils), which are typically being considered for micro laser welding applications; specifically, copper (Cu), aluminium (Al), titanium (Ti), stainless steel (SS) and steel (the latter just for Al to steel dissimilar joining) as monometallic and dissimilar joining. For the purposes of this literature review, the term 'micro laser welding' refers to penetration depths up to 1000?m.

The following information has typically been found from the available literature:

  • An understanding of the relationship between the laser welding parameter(s) and the work piece being welded, and/or
  • Quality, microstructure and/or properties of the welded joint.

This literature review has focused on published literature on laser welding with fibre and disc continuous wave (CW) laser sources. It does not include studies using CW diode, CO2 lasers or any pulsed lasers, for the reasons below.

Fibre and disc CW laser sources:

  • Present greater potential to weld thin sheets and foils with higher productivity than pulsed sources.
  • Their beam can be fibre delivered, which makes them more suitable for implementation in a manufacturing environment than CO2 lasers.
  • Present higher beam quality than diode lasers.

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