PSI - Issue 28

Jesús Toribio et al. / Procedia Structural Integrity 28 (2020) 2416–2423 Jesús Toribio et al. / Procedia Structural Integrity 00 (2020) 000–000

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8. Conclusions The manufacture process of prestressing steel wires by progressive cold drawing of an initially hot-rolled pearlitic steel produces important microstructural changes in the material at the two microstructural levels of perlitic colonies and lamellae, resulting in a marked microstructural orientation/anisotropy . From the materials science and engineering viewpoint, there is a clear relationship between the microstructural orientation/anisotropy induced by the progressive cold drawing and the existence of a fracture profile containing crack path deflection and a propagation step . The appearance of notch-induced anisotropic fracture behaviour in heavily cold-drawn perlitic steel requires, in addition to the inherent microstructural orientation/anisotropy generated by the drawing process itself, a sufficient level of stress triaxiality ( constraint ) in the sample, produced either by cracks or by sharp notches . Acknowledgements The authors wish to kindly acknowledge the financial support provided by the following Spanish Institutions: Ministry for Science and Technology (MICYT; Grant MAT2002-01831), Ministry for Education and Science (MEC; Grant BIA2005-08965), Ministry for Science and Innovation (MICINN; Grant BIA2008-06810), Ministry for Economy and Competitiveness (MINECO; Grant BIA2011-27870) and Junta de Castilla y León (JCyL; Grants SA067A05, SA111A07 and SA039A08) In addition, as the paper is a tribute to John Ford, it is also dedicated to Angel María Irisarri, master and friend, prominent scientist in the field of fracture mechanics & structural integrity, as well as expert in John Ford movies. References Toribio, J., 1997. A Fracture Criterion for High-Strength Steel Notched Bars. Engineering Fracture Mechanics 57, 391-404. Toribio, J., 2002. A Fracture Criterion for High-Strength Steel Cracked Bars. Structural Engineering and Mechanics 14, 209-221. Toribio, J., 2004. Microstructure-Based Modelling of Fracture in Progressively Drawn Pearlitic Steels. Engineering Fracture Mechanics 71, 769 777. Toribio, J., 2006. Cold Drawn Eutectoid Pearlitic Steel Wires as High Performance Materials in Structural Engineering. Structural Integrity and Health Monitoring 2, 239-247. Toribio, J., 2017a. Structural Integrity of Progressively Cold-Drawn Pearlitic Steels: From Raffaello Sanzio to Vincent van Gogh . Invited Plenary Lecture, 24th Meeting of the Italian Group on Fracture (IGF XXIV), 2nd International Edition, Urbino, Italy, March 1-3. Toribio, J., 2017b. Structural Integrity of Progressively Cold-Drawn Pearlitic Steels: From Raffaello Sanzio to Vincent van Gogh . Procedia Structural Integrity 3, 3-10. Toribio, J., 2018a. Cold-Drawn Pearlitic Steels as Hierarchically Structured Materials: An Approach to Johann Sebastian Bach . Key Engineering Materials 774, 492-497. Toribio, J., 2018b. Notch-Induced Fracture of Cold-Drawn Pearlitic Steel Wires: Resembling John Ford’s Monument Valley . Keynote Plenary Lecture, 2018 International Conference on Materials Strength and Applied Mechanics (MSAM 2018), Kitakyushu, Japan, April 10-13, 2018. Toribio, J., Ayaso, FJ., 2001. Fracture Performance of Progressively Drawn Pearlitic Steel under Triaxial Stress States. Materials Science 37, 707 717. Toribio, J., Ayaso, FJ., 2002a. Micromechanics of Fracture in Notched Samples of Heavily Drawn Steel. International Journal of Fracture 115, L29-L34. Toribio, J., Ayaso, FJ., 2002b. Fracture Process Zone in Notched Samples of Cold Drawn Pearlitic Steel. ISIJ International 42, 1049-1055. Toribio, J., Ayaso, FJ., 2002c. Investigation of the Type of Cleavage Related to Anisotropic Fracture in Heavily Drawn Steels. Journal of Materials Science Letters 21, 1509-1512. Toribio, J., Ayaso, FJ., 2003a. Anisotropic Fracture Behavior of Cold Drawn Steel: AMaterials Science Approach. Materials Science and Engineering A343, 265-272. Toribio, J., Ayaso, FJ., 2003b. A Fracture Criterion for High-Strength Structural Members Containing Notch-Shape Defects. Steel & Composite Structures 3, 231-242. Toribio, J., Ayaso, FJ., 2004a. Macro- and Microscopic Approach to Fracture of High-Strength Steel Notched Bars. In: S. Nishida (Ed.), “Macro- and Microscopic Approach to Fracture”, WIT Press, Southampton, 201-242. Toribio, J., Ayaso, FJ., 2004b. Optimisation of Round-Notched Specimen for Hydrogen Embrittlement Testing of Materials. Journal of Materials Science Letters 39, 4675-4678. Borchers, Ch., Kirchheim, R., 2016. Cold-Drawn Pearlitic Steel Wires. Progress in Materials Science 82, 405-444. Gil-Sevillano, J., 1986. Cleavage-Limited Maximum Strength of Work-Hardened B.C.C. Polycrystals. Acta Metallurgical 34, 1473-1485.