ALBUQUERQUE, M. C. S.; http://lattes.cnpq.br/6765184773476155; ALBUQUERQUE, Maria Cléa Soares de.
Resumen:
The effects of the microstructural variation, specimens dimensions
and granulometry on the values of toughness of a High Strength Low Alloy (HSLA)
pipeline steel API 5L-X60 welded joint used to petroleum exploration were
investigated. In a first analysis, Charpy impact tests in specimens machined of
different places of the welded joint were made on both as-welded and stressrelieved
conditions at 873K (600°C). In the second analysis, Charpy impact tests
and CTOD at maximum load ( 8 m a x ) in different specimens dimensions and
machined of different places of the weld metal were made. The results showed
significative variations in the values of impact resistance and fracture toughness,
evidencing the importance of notch machined position in the Heat Affected Zone
interest region, of contribution of the weld metal recrystallized grains and of the
stress/strain state on the crack tip, on the estimation of the mechanical properties
of welded joints produced by multipass technique.
