Developments in Plate and Line Pipe Steels: Developments in Plate and Line Pipe Steels
Sponsored by: AIST Metallurgy—Processing, Products and Applications Technology Committee
Program Organizers: Daniel Baker, LIFT; Ashish Singh, Nucor Steel Arkansas; Pello Uranga, CEIT and TECNUN (University of Navarra)

Tuesday 2:00 PM
October 19, 2021
Room: A211
Location: Greater Columbus Convention Center

2:00 PM
Modified Charpy V-notch Testing of Wind Tower Steels: Keith Taylor¹; Laura Dawson²; Matthew Werner¹; ¹SSAB Americas; ²Virginia Polytechnic Institute and State University
    Modern low-carbon microalloyed HSLA steels exhibit high toughness and are widely used in structural applications. Toughness levels are often so high that obtaining valid results in Charpy V-notch impact toughness testing is difficult. In some cases, sub-size specimens are employed to avoid exceeding the test machine’s energy capacity. Also, plastic deformation during the test can be extensive and complete fracture of the test specimen may not occur. Recent investigations have employed a modified Charpy specimen configuration with side grooves that produce an increased degree of constraint and a more plane strain stress state during the test. The amount of plastic deformation and energy absorption are reduced substantially. Also, stresses parallel to the notch root are increased, resulting in a greater propensity for “splitting” during fracture. This investigation employed both standard and side-grooved CVN specimens to characterize the toughness of five Nb- and V-microalloyed plate steels suitable for wind turbine towers.

2:20 PM
The Formation of Structure and Properties of Low-alloyed Steels in Hot Deformation Process: Valeriy Mishchenko¹; Sergеy Sheyko¹; Vadim Shalomeev²; ¹Zaporizhzhia National University; ²National University "Zaporizhzhia Polytechnic"
    It has been established that steel 10ХФТБч (Standard of Ukraine) used for vehicle wheel disks has a ferrite structure with a tiny amount of perlite. The steel maintains high plasticity properties at different thicknesses. If the content of alloying elements is rather high the grain size and, consequently, plasticity parameters keep steady in the recrystallization process during considerable periods of soaking time. The degree of deformation and energy-power parameters of hot rolling also affect plasticity and strength of steel 10ХФТБч.