AISTech 2022

Evaluating the Onset of Hot Tearing in High-Strength and Lightweight Steels Using Controlled Deformation Testing (Room 316)

16 May 22
10:00 AM - 10:30 AM

Tracks: Continuous Casting/Metallurgy-Steelmaking & Casting

Speaker(s): Simon Lekakh, Missouri University of Science and Technology; Laura Bartlett, Missouri University of Science and Technology; Soumava Chakraborty, Missouri University of Science and Technology; Katelyn Kiser, Missouri University of Science and Technology; Viraj Athavale, Missouri University of Science and Technology; Mario Buchely, Missouri University of Science and Technology; Daniel Field, DEVCOM Army Research Laboratory, U.S. Army Research Laboratory; Krista Limmer, DEVCOM Army Research Laboratory, U.S. Army Research Laboratory; Katherine Sebeck, DEVCOM Ground Vehicle Systems Center, U.S. Army Research Laboratory

The onset of hot tearing in X70, Cr-Ni-Mo and Fe-Mn-Al steels was evaluated using controlled deformation testing (CDT). The CDT device consisted of a cylindrical phenolic resin-bonded sand mold with an electrical cylinder that was computer controlled to apply a tensile force to the steel shell during solidification. Solidification structure and strain rates were controlled to mimic the continuous casting process. Sulfur prints and macroetching of the resulting castings were used to identify hot tearing and evaluate the solidification structure. Resulting hot tears and microsegregation were evaluated utilizing scanning electron microscopy and energy-dispersive x-ray spectroscopy.