Mechanical characterisation of a P91 weldment by means of small punch fracture testing
Date
2013
Authors
Hurst, Roger C.
Turba, Krystof
Hähner, Peter
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
Small Punch fracture tests were carried out in order to determine low temperature mechanical behaviour of a P91 steel weldment: weld metal, base metal, Heat Affected Zone-Fine Grained and Heat Affected Zone-Coarse Grained. The Heat Affected Zone-Fine Grained showed superior tensile properties in terms of displacement at fracture (ductility) and strength (maximum force) compared to the other zones, which became more pronounced at lower temperatures, whilst the weld metal exhibited inferior behaviour. Ductile Brittle Transition Temperatures were evaluated from Small Punch results for all zones and the results of base metal and weld metal were correlated with the transition temperatures obtained from Charpy V notch tests according to the CEN Code of Practice for Small Punch testing. Heat Affected Zone-Fine Grained with its finest structure exhibited the lowest transition temperature and the weld metal the highest. Heat Affected Zone-Coarse Grained and base metal were found to have quite similar transition temperature values.
Description
Keywords
Engineering, Small punch testing technique, Fracture, Charpy test, P91 steel, Ductile to brittle transition temperature, Temper embrittlement, Yield strength, Welded-joint, Creep test, Steels, Specimen, Fracture, Fracture testing, Heat affected zone, Charpy tests, Charpy V-notch test, Ductile-brittle transition temperature, Ductile-to-brittle transition temperature, Mechanical behaviour, Mechanical characterisation, P91 steel, Small punch testing, Temperature
Citation
Gülçimen, B. vd. (2013). "Mechanical characterisation of a P91 weldment by means of small punch fracture testing". International Journal of Pressure Vessels and Piping, 105, 28-35.