Investigating the effects of mitigation techniques on residual stress and microstructure of HSLA welds
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Date
2016-07-03
Journal Title
Journal ISSN
Volume Title
Publisher
Materials Research Forum LLC
Abstract
Post-weld heat treatment is often required for pressure vessel and piping components for relaxing residual stresses and increasing the resistance to brittle fracture. The present study employed neutron diffraction to examine the effects of conventional post-weld heat treatment (PWHT) on the residual stresses in multi-pass, high-strength, low-alloy-steel, weld joints made by combined Modified Short Arc Welding (MSAW) and Flux Cored Arc welding (FCAW) processes. Residual stresses in excess of yield strength were developed in the Heat Affected Zone (HAZ) and the weld metal of the as-welded specimen (particularly the upper layers of the weld) which were reduced significantly as a result of applying PWHT. Also PWHT lead to substantial changes in the microstructural characteristics of high-strength, low-alloy-steel welds. © The Authors
Description
Keywords
Neutron diffraction, Residual stresses, Welding, Alloys, Steels, Heat treatments, Pressure vessels, Microstructure
Citation
Alipooramirabad, H., Ghomashchi, R., Paradowska, A. & Reid, M. (2016). Investigating the effects of mitigation techniques on residual stress and microstructure of HSLA welds. Paper presented to the 10th International Conference on Residual Stresses (ICRS 10), Sydney, Australia, 3-7 July, 2016. In T. M. Holden, T. M., O. Muránsky, & L. Edwards (Eds) (2017). Residual stresses ICRS-10. Millersville, USA: Materials Research Proceedings, Vol. 2, 563-568. doi:10.21741/9781945291173-95