Abstract
In this work the properties of two API X70 PSL2 steels obtained from two different suppliers were compared on tension and Charpy (CVN) tests in three different orientations (longitudinal, transverse and diagonal), the transverse DWTT (Drop Weigh Tear Test) properties in two different plate zones were also compared. Both steels were manufactured by TMCP (Thermomechanical Control Process), observing differences in chrome content and a considerable contrast in the microstructure, which exhibited different types of ferrite, bainite and second phase particles in one steel, getting better impact properties at different temperatures in the steel with more chrome and higher density of acicular ferrite, better tension properties in the steel with second phase particles, and obtaining a 100% ductile fracture surfaces in both steel in DWTT, confirming the propagation mechanism of ductile cracks in acicular ferrite and brittle cracks by cleavage planes in polygonal ferrites, and by quasi polygonal ferrite in this work.
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Guzmán, F., Hinojosa, M., Frias, E. (2018). Effect of Microstructure on Tension, Charpy and DWTT Properties on Two API X70 Plates. In: Ambriz, R., Jaramillo, D., Plascencia, G., Nait Abdelaziz, M. (eds) Proceedings of the 17th International Conference on New Trends in Fatigue and Fracture. NT2F 2017. Springer, Cham. https://doi.org/10.1007/978-3-319-70365-7_18
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DOI: https://doi.org/10.1007/978-3-319-70365-7_18
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