DETERMINATION OF LOCAL BRITTLE ZONES AT THE CRACK FRONT IN THE HAZ OF WELDED JOINT
Abstract
Welded joints are the weakest link in the construction of steel structures. The brittlest part of a multi-pass welded joint is the heat-affected zone, where brittle fractures of the structure often appear. In this article, examination of the whole heat-affected zone of high strength multipass X welded joints was performed. All microstructures and the local brittle zones’ sizes at the crack tip front were precisely determined
Downloads
References
Mlakar, M.: Determination of local brittle zones at the crack front in the HAZ of welded joint. Master Thesis, Faculty of Energy Technology, University of Maribor, Slovenia, 2015
BS 5762, Methods for crack opening displacement (COD) testing, The British Standards Institution, London 1979
ASTM E 1152‐87, Standard test method for determining J‐R curves, Annual Book of ASTM Standards, Vol. 03.01, American Society for Testing and Materials, Philadelphia, 1990
ASTM E 1290‐91, Standard test method for crack‐tip opening displacement (CTOD) fracture toughness measurement, American Society for Testing and Materials, Philadelphia, 1991
GKSS Forschungszentrum Geesthacht GMBH, GKSS‐Displacement Gauge Systems for Applications in Fracture Mechanic
Praunseis, Z., Toyoda, M., Sundararajan, T.: Fracture behaviours of fracture toughness testing specimens with metallurgical heterogeneity along crack front. Steel res., 71, Vol. 9, Sep. 2000
Praunseis, Z., Sundararajan, T., Toyoda, M., Ohata, M.: The influence of soft root on fracture behaviors of high‐strength, low‐alloyed (HSLA) steel weldments. Mater. manuf. process., Vol. 16, 2001
Toyoda, M.: Fracture toughness evaluation of steel welds, Book of Mechanics, Osaka University, 1989