Machine GTAW Ambient Temperature Temper Bead Repair

In this section

Back to Core Research Programme 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

A Review of the Machine GTAW Ambient Temperature Temper Bead Repair Technique for Nuclear Power Plant Components Technical Literature Review 22952

TWI Technical Literature Review 22952

By Marcello Consonni

Background

Repair by welding of a metallic component may be required during original fabrication, following in-service inspection or during planned maintenance operations. In some instances a post-weld heat treatment (PWHT) is required according to the fabrication specification. A PWHT is applied to a welded component with the main purpose of reducing the residual stresses produced by welding; at the same time, some tempering of the HAZ is obtained. However, its application may be impractical, potentially unsafe for the structure or personnel, and/or non-cost effective in a repair situation. In such cases, it may be possible to apply a modification or repair by using a welding procedure designed to effect tempering of the heat-affected zone (HAZ) produced by the repair itself, hence waiving the need for a PWHT. Such techniques are commonly referred to as 'temper bead welding', and it is also known as 'controlled deposition', 'half-bead welding' and 'butter bead welding' (see definitions in Section 2). The expression 'temper bead' is commonly used to refer to these techniques collectively and will be used throughout this review.

As noted by Brett (1986 and 1995) in a brief history of the technique, the approach was first used as early as 1965 in the former Soviet Union for the repair of Cr-Mo-V castings without a subsequent PWHT. This method has been successfully applied through the years on numerous steel components during fabrication as well as in-service.