Residual Stress Control via Martensitic Weld Metal

In this section

Back to Core Research Programme AMorph – 4D Printing for Field Morphing Structures Automation of Composite and Hybrid Joining Process Coaxial Wire Additive Manufacturing Processes and In-Line Monitoring Tools Development of Coded Excitation Technique for Non-Metallic Pipes Inspection Development of Digital Twin technology as a demonstrator for real-time integrity assessment of crack growth in tensile specimens Development of Friction Stir Welding (FSW) for Hydrogen Fuel Storage Tanks Development of Leak-Before-Break Hydrogen Storage Composite Pressure Vessels With Polymeric Liner Establishing Assessment Methods for Determining Safe Service Limits of High-Temperature Materials in Extreme Environments Fracture toughness in aggressive environments: effect of crack monitoring techniques on test results In-process detection and non-destructive testing of electron beam weld imperfections Internal Bore Coatings for Applications in Corrosion and Hydrogen Environment Joining of Additively Manufactured Materials Long term behaviour of polymeric liner materials/coatings in hydrogen service Techniques for High Temperature Ultrasonic Inspection of Arc Welding Ultimate Leverage Fund

Project Code: 0902-04

Objectives

Establish whether significant residual stress reduction can be achieved in industrially relevant welded joints in high strength steel via the development and use of welding consumables with a low martensitic transformation temperature.

Project Outline

The project will identify the required characteristics for the new consumables and propose compositions. Trial welding consumables will be produced, and welds deposited so that the ability to reduce residual stresses via transformation effects and thermal cycle control can be established. The test programme will include measurement of residual stresses and microstructural assessment, to establish whether full transformation has occurred. Dilatometry will be performed to identify the transformation characteristics of the weld metal.

Relevant Industry Sectors

Construction and Engineering

Technical and Economic Benefits

Identification of welding consumable compositions giving reduced weld residual stress.