Advances in Ferrous Metallurgy: Advances in Steel Products
Sponsored by: AIST Metallurgy—Processing, Products and Applications Technology Committee
Program Organizers: Daniel Baker, LIFT; Emmanuel De Moor, Colorado School of Mines; Kishlay Mishra, Nucor Castrip Arkansas LLC; Lijia Zhao, Northeastern University

Monday 4:00 PM
October 18, 2021
Room: A210
Location: Greater Columbus Convention Center

4:00 PM
High Strength Low Alloy Steels strengthened by Heusler precipitates: Rafael Rodriguez De Vecchis¹; Minal Shah¹; Yuankang Wang¹; Xin Wang¹; Soumya Sridar¹; Zhangwei Wang¹; Wei Xiong¹; ¹University of Pittsburgh
    Copper-bearing high-strength low-alloys (HSLA) steels are remarkable candidate alloys for a wide range of automotive and naval applications due to their unique combination of strength, toughness, and weldability. At the core of this outstanding properties synergy, it is the well-understood role of Cu and M₂C precipitates. However, in the continuous search for stronger, lighter, and low-alloying steels, precipitation strengthening of Heusler compounds has proven promising but has been so far left unexplored in the context of HSLA steels. Using a CALPHAD-based ICME framework, this work successfully introduces the intermetallic Fe₂SiTi Heusler phase as an effective grain refiner and strengthening precipitate. After a heat-treatment design, co-precipitation of nanosized Cu cluster and Fe₂SiTi precipitates yield a peak aged hardness values above 700 HV and compression yield strength values above 1.8 GPa with more than 12% ductility.

4:20 PM
Development of Fine Grained Steel for Cold Heading Application: Deepan N¹; Manjini Sambandam¹; ¹JSW Steel Ltd, Salem Works
    Niobium has been a crucial element in the recent progress of the world of steels. This project covers the aspects of increment in strength along with the upsetability in cold heading boron steels. Niobium added as micro alloying element at various levels between 0.01 and 0.02% in 0.20-0.30% carbon steel and studied for the grain refinement at cast stage, intermediate rolling stage and rolled wire rod of sizes between 5.5mm and 20mm diameter. The grain refinement in the rolled product also achieved by using higher input section billets up to 250 mm2 which lowers the input austenitic grain size before rolling. Addition of Niobium to the higher input billet section results in refining the grains of the rolled product from 25-35μm to 10μm and even lesser, with the increase in upsetability up to 80% compression and increase in the ratio of yield to tensile strength significantly