AISTech 2022

High-Temperature Compression Behavior and Phase Transformations During Continuous Cooling of a Low-Alloy Cr-Ni-Mo Ultrahigh-Strength Steel (Room 310)

18 May 22
8:00 AM - 8:30 AM

Tracks: Specialty Alloy & Foundry/Metallurgy-Processing, Products, & Applications

Speaker(s): Laura Bartlett, Missouri University of Science and Technology; Soumava Chakraborty, 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; Rogerio Antao Cardoso, Master`s student, Missouri S&T; Krista Limmer, DEVCOM Army Research Laboratory, U.S. Army Research Laboratory; Katherine Sebeck, DEVCOM Ground Vehicle Systems Center, U.S. Army Research Laboratory

A quenching and deformation dilatometer was used to investigate the thermo-mechanical behavior of a low-alloy Cr-Ni-Mo ultra-high strength steel. It was submitted to different thermocycles to explore the effect of differing cooling rates on phase transformation temperatures and final microstructure. Single-hit compression tests were carried out in the temperature range of 900–1200 °C under strain rates of 0.01, 0.1 and 1 s⁻¹ to analyze the dynamic recrystallization behavior. Results indicates that this steel is characterized by an elevated hardenability. The proposed constitutive equation satisfactorily represents the flow stress data for the ranges of strain rate and temperature evaluated in this study.