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Metallurgy - Processing, Products & Applications Webinar

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Tuesday, November 24, 2020
Jessica Mortimer,jmortimer@aist.org or +1.724.814.3070

AIST Webinar 1:30 PM ET -3:00 PM ET

Attendees will learn about a variety of metallurgy, processing, products and applications-related topics that were originally scheduled for presentation at AISTech 2020. This webinar will present three papers including "Generation of High-Corrosion-Resistance Surface-Optimized Diffusion Alloy (SODA) Steel Sheet for Forming Operations," "Development of Nanobainitic Steels With Accelerated Kinetics and Tensile Strength of 1.7-2.0 GPa" and "A Modified Johnson-Cook Model Incorporating the Effect of Grain Size on Flow Stress."

Dr. Dai Tang
Melt Shop Metallurgist
Nucor Steel-Decatur LLC
Dai Tang is currently a melt/cast metallurgist in the meltshop area at Nucor Steel-Decatur LLC. Her work focuses on improving processing, reducing cost and grade development. She also serves as a reviewer for the journal Materials and Metallurgical Transactions B. She graduated from Carnegie Mellon University with a Ph.D. in materials science. She conducted research about nitrogen reactions in the advanced high-strength steel in the Center for Iron and Steelmaking Research, under the supervision of Chris Pistorius. She is currently pursuing another master's degree in data science from Georgia Tech. She has participated in AIST actively since 2015. She has presented several papers at AISTech and has won several AIST awards.

Mr. Zachary Detweiler
Director of Research
Arcanum Alloys
Zach Detweiler is the director of research at Arcanum. The research team is responsible for developing new methods and adapting them to existing manufacturing techniques to allow production of alloys at the massive scale expected from the steel industry. He holds a Ph.D. in the chemistry of materials from Princeton University.
Minal Shah
CSIR
Minal Shah is working as scientist in CSIR National Metallurgical Lab, Jamshedpur, India. She submitted her Ph.D. thesis at the University Academy of Scientific and Innovative Research in August 2020 with the title "Study on Transformation Kinetics of Nanostructured Bainitic Steels." She received the IIM-A.K. Bose Gold Medal Award for Best M. Tech thesis entitled "Development of Bainite-Austenite Steel by Air Cooling With Good Erosion Resistance" in 2016. She has five SCI publications, seven NON-SCI publications and holds four patents. Her research interests are physical and mechanical metallurgy, phase transformations, structure-property correlation, and tribo-mechanisms of materials. She has vast experience in industrial research on projects related to material development for grinding media balls for wear resistance applications, materials development for blowbar used in primary crusher in cement industry, alloys development for silt erosion in turbine blades, etc.
Mr. Shouvik Ganguly
Graduate Research Assistant
Missouri University of Science & Technology
Shouvik Ganguly is pursuing Ph.D. in mechanical engineering and his dissertation is titled "Thermomechanical Simulation and Process Optimization for Hot Rolling of Steel." During his Ph.D., his research has been developing computational models for steel and simulating the hot rolling process for various industries. Prior to his Ph.D., he completed his master's degree with a focus on finite element simulation of adhesive joints having application in the automotive industry. He also has experience working in computing and software development in industry.

Generation of High-Corrosion-Resistance Surface-Optimized Diffusion Alloy (SODA) Steel Sheet for Forming Operations

Zack Detweilers, Arcanum Alloys

Arcanum Alloys has developed a method to generate variable chromium concentrations at the surface of a steel substrate at the sheet coil scale. This presentation will cover the development of a steel substrate that is compatible with high-temperature annealing and diffusion alloying. The corrosion performance of the resulting alloy will also be discussed in terms of surface chromium concentration and steel substrate chemistry. Lastly, the mechanical properties will be presented to highlight the potential of spatially segregating alloys with this platform technology.

Development of Nanobainitic Steels With Accelerated Kinetics and Tensile Strength of 1.7-2.0 GPa

Minal Shahr, CSIR-National Metallurgical Lab

Nanobainite steels with medium carbon ~0.5 wt.% are produced in the present work with faster kinetics and without the addition of cobalt and aluminum. Nanobainitic steel of 1.7-2.0 GPa ultimate tensile strength is used in application of wear resistance, ball bearing and gears. Kinetics of bainitic transformation was investigated by emphasizing on influence of alloying elements to produce nanobainitic steel. Reduction of carbon in the alloy accelerates the kinetics of transformation as it increases the driving force for bainitic transformation and it reduces activation energy of the dislocation barrier determined using a kinetic model. The activation energy of the dislocation barrier has a direct relation on austenite strength at the transformation temperature.

A Modified Johnson-Cook Model Incorporating the Effect of Grain Size on Flow Stress

Shouvik Ganguly, Missouri University of Science and Technology

The mechanical properties of steel are influenced by grain size, which can change through nucleation and growth at elevated temperatures. However, the classic Johnson-Cook model that is widely used in hot deformation simulations does not consider the effect of grain size. In this study, the Johnson-Cook model was modified to incorporate the effects of austenite grain size on flow stress. A finite element model was employed to characterize the effects of grain size on the flow stress for different steel grades over a range of temperatures (900°C to 1,200°C). Simulation results show good agreement with experimental observations.

Event Sponsor - 1 available per webinar US$3,500

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