Phd, Research Asst. Professor
271 McNutt Hall
1400 N. Bishop
Materials Science and Engineering
Missouri S&T, Rolla, MO
Dr. Mario Buchely is a Research Assistant Professor in the Department of Materials Science and Engineering at Missouri S&T, and he is currently working as a PI in the Kent D. Peaslee Steel Manufacturing Research Center (PSMRC) at Missouri S&T.
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Research interests
Thermo-mechanical testing and design, Thermo-mechanical characterization of materials, Finite-Element analysis, Manufacturing technologies, Steelmaking process and technology.
Current and Past research
Feb. 2020 - Present
Research Professor, PSMRC, Missouri S&T
Current research projects:
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Rapid Development of Next Generation Ultrahigh Strength and Lightweight Steels for Army Modernization.
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Cast pre-form forging of train wheels
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Intensive Quenching to produce High Performance Cast Parts
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Hot Rolling Material flow: Analysis and Optimization
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Development of Electrical Steels using Castrip™ technology
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Hot Tearing and Segregation
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Controlling Micro-alloy Interaction on Precipitation, Hot ductility and Microstructure
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Installation and upgrade of Gleeble 1500 Thermo-mechanical Simulator
Jul. 2016 - Jan. 2020
Postdoctoral fellow, PSMRC, Missouri S&T
Completed research projects:
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Influence of Precipitate on HER and ductility of next generation of TRIP steel
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Characterization of steels manufactured by additive manufacturing methods
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Solid-Metal-Embrittlement of Ti-6Al-2Sn-4Zr-2Mo
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3rd Generation Advanced High Strength Steel
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Characterization of steels manufactured by additive manufacturing methods
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Characterization of materials at high strain-rates using the split-Hopkinson pressure bar system
Aug. 2010 - Aug. 2013
Graduated Research Assistant, Universidad de los Andes
Research projects
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Development of ballistic protection systems in composite materials
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New materials for Armor applications.
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Grants
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Methodology for automatic measurements of eutectic cells in gray iron. 2021-2022. Caterpillar Inc., $22,465, PI (Under review).
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Next Generation Alloy Development for Scanning Induction Hardened Bearings. 2021-2023. Timken Company, $119,067, PI (Under review).
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Controlling Microalloy Interactions on Precipitation, Hot Ductility, and Microstructure - Mechanical Property Relationships. 2020-2021. PSMRC, Missouri S&T, $90,000, Co-PI (10% responsibility).
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Understanding and controlling porosity, segregation and high temperature ductility in continuous cast and foundry steels. 2020-2021. PSMRC, Missouri S&T, $90,000, Co-PI (10% responsibility).
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Peritectic Behavior Detection and Prediction in Fe-C-Mn-Al-Si systems. 2020-2021. PSMRC, Missouri S&T, $110,000, Co-PI (10% responsibility).
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Hot Rolling Material Flow Analysis and Optimization. 2020-2021. PSMRC, Missouri S&T, $90,000, Co-PI (25% responsibility).
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Rapid Development of Next Generation Ultrahigh Strength and Lightweight Steels for Army Modernization. 2020-2021. Army Research Lab (ARL), $4,629,288, Co-PI (15% responsibility).
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Cast Strip Product Development III. 2020-2023. Nucor Corp., $417,559, Co-PI (25% responsibility).
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Education
July 2016, PhD in Engineering
Universidad de los Andes
Bogota DC, Colombia
Dissertation: Impact penetration dynamics: a study from engineering models perspective.
Advisor: Dr. A. Maranon (emaranon@unianded.edu.co)
Internship: Sept.2013 – Feb.2014, and June – July 2014. Dynamic material testing using split Hopkinson pressure bar technique. Missouri S&T. Advisor: Dr. D. Van Aken (dcva@mst.edu)
Relevant Courses: Penetration dynamics, Elasticity theory, Polymer mechanics, Science and technology of ceramics.
Relevant research:
* Spherical cavity expansion approach for the study of rigid-penetrator’s impact problems,
https://doi.org/10.3390/applmech1010003
* Study of steady cavitation assumptions in strain-rate-sensitive solids for rigid projectile penetrations,
https://doi.org/10.1007/s00707-016-1667-5
* Material model for modeling clay at high strain rates,
https://doi.org/10.1016/j.ijimpeng.2015.11.005
* Dynamic characterization of Roma Plastilina No. 1 from Drop Test and inverse analysis,
https://doi.org/10.1016/j.ijmecsci.2015.06.009
https://doi.org/10.1007/s00707-015-1359-6
* Engineering model for low-velocity impacts of multi-material cylinder on a rigid boundary,
Sept. 2010, M.Sc. in Mechanical Engineering
Universidad de los Andes
Bogota DC, Colombia
Master’s thesis: Effect of welding electrode covering type in high cycle axial fatigue on AISI/SAE 304.
Special reward as the best Master’s thesis: Spring semester, 2010.
Relevant Courses: Advanced dynamics, Movement control, Failure analysis.
Relevant research:
https://doi.org/10.1016/j.jmapro.2015.08.005
(In Spanish)
Dec. 2004, B.S. in Mechanical Engineering
Universidad Nacional de Colombia
Medellin, Colombia
Undergraduate thesis: Study of hard facing welding alloys with complex carbides precipitation.
Relevant Courses: Industrial automation, Materials properties, Phase transformations in metals, Welding metallurgy.
Relevant research:
* The effect of microstructure on abrasive wear of hardfacing alloys,
https://doi.org/10.1016/j.wear.2005.03.002
(In Spanish)
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Teaching
Fall 2018 - Spring 2020
Missouri S&T
Rolla, MO
Lecturer in the department of Mechanical and Aerospace Engineering.
Course taught: Introduction to Manufacturing processes.
Fall 2014 - Spring 2016
Universidad ECCI
Bogota DC, Colombia
Adjunct professor in the department of Mechanical Engineering.
Courses taught: Manufacturing processes 1, and Manufacturing processes 2.
Spring 2015
Universidad Jorge Tadeo Lozano
Bogota DC, Colombia
Lecturer in department of Chemical Engineering.
Course taught: Materials Engineering.
Fall 2008 - Spring 2010
Universidad de los Andes
Bogota DC, Colombia
Graduated teaching assistant in the department of Mechanical Engineering.
Course taught: Graphical design. Course TA: Design of mechanical systems.
Fall 2002 - Spring 2004
Universidad Nacional de Colombia
Medellin, Colombia
Teaching assistant in the department of Mathematics.
Course TA: Multivariable calculus.
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Recent Publications
Steel Reseach Int. 2020, 91(4)
Experimental Development of Johnson‐Cook Strength Model for Different Carbon Steel Grades and Application for Single Pass Hot Rolling
Johnson‐Cook (JC) high temperature strength material models have been widely used in Finite Element Analysis (FEA) to solve variety of hot rolling problems. In this paper, the temperature and strain rate related parameters of JC model were experimentally calibrated for eight different steel grades including SAE 1018 and SAE 1045, structural steels (ASTM A572‐60, ASTM A690 and ASTM A992), two V‐modified 1535/45 grades and one automotive AHSS grade. Experimental data was obtained from tensile tests performed at strain rates from 0.001 s−1 to 20 s−1 and at temperatures between 900°C and 1200°C. A genetic algorithm approach was used to determine JC model parameters for different steel chemistries and to calculate the rolling pressure for a simple flat rolling process using both a common analytical formulation and a Finite Element Model (FEM). A model for the effects of steel chemistry on the JC model parameters is also discussed.
J. Manuf. Process., 2020, 52, 281-288
Experiment and simulation of static softening behavior of alloyed steel during round bar hot rolling
Static softening is a crucial mechanism during the hot rolling of steel to relax residual stress and strain, refine microstructure, and improve mechanical properties. In this study, double hit tests with varying temperature, strain rate, interpass time, and pre-strains were performed using a Gleeble machine to investigate static softening behavior. Based on experimental results, a kinetic model of static softening was developed to represent interpass softening behavior during hot rolling. An explicit static softening model was implemented as a subroutine into a three-dimensional finite element model of round bar hot rolling and static softening was simulated. Results show that static softening occurs quickly at the beginning of the interpass time and then slows down. Also, the effects of temperature and rolling speed on static softening were simulated and the results show that temperature has a more significant influence on static softening than rolling speed.
Applied Mechanics MDPI, 2020, 1(1), 20-46
Spherical Cavity Expansion Approach for the Study of Rigid-Penetrator’s Impact
In recent years, Spherical Cavity Expansion (SCE) theory has been extensively utilized to model dynamic deformation processes related to indentation and penetration problems in many fields. In this review, the SCE theory is introduced by explaining the different mathematical features of this theory, its solution, and a potential application to model the penetration of a rigid penetrator into a deformable target. First, a chronologically literature review of the most common models used to study this kind of penetration problems is introduced, focusing on the SCE theory. Then, the engineering model of penetration is presented using the SCE approach. The model is then compared and validated with some FE numerical simulations and with previous penetration results. It is concluded that this engineering model based on the SCE theory can be utilized to predict the projectile deceleration and penetration depth into the semi-infinite and finite targets impacted by rigid penetrators.
Metall Mater Trans B, 2019, 50, 1180–1192
Analysis of Hot- and Cold-Rolled Loads in Medium-Mn TRIP Steel
The purpose of this work is to investigate the hot- and cold-rolling requirements to produce third-generation advanced high-strength steels (AHSS). Therefore, five medium-Mn (10 to 14 wt pct Mn) alloys that exhibit transformation-induced plasticity (TRIP) were compared to a commercially produced grade of AISI 1018 using hot- and cold-rolling experiments. Experimental data collected from a STANAT instrumented rolling mill was utilized to measure force and torque during hot- and cold-rolling. Experimental data were processed by a 1D analytical model, based on Orowan model, to determine rolling pressure. It was determined that pressures required to hot-roll TRIP alloys are 1.4 to 1.8 times greater than pressures for rolling AISI 1018 steel. Cold rolling of the medium-Mn TRIP steels was found to be 1.5 to 2.8 times greater than the AISI 1018 steel. Mechanical and microstructural characterization was also performed and the variation in rolling pressure was related to the starting microstructural constituents, and alloys containing greater starting quantities of ε-martensite in the microstructure had higher flow stresses at equivalent rolling strains during cold rolling.