Professor

Associate Professor

• Research and Professional Experience

2018-present     

  Associate Professor, Division of Advanced Materials Engineering, Kongju National University.

• Current research in our lab. focuses on development of heat-resistant ferritic alloys and investigation of their microstructure, deformation behavior and mechanical properties (National Research Foundation of Korea: 2020R1C1C1005553), and achievement of superior properties of materials via controlling hierarchically-structured metallic composite powder (Basic Research Laboratory Program: 2019R1A4A1026125). Moreover, we are working on transformation-induced-plasticity and precipitate-hardened high-entropy alloys with excellent mechanical properties.

2016-2017            

  Post-Doctoral Research Associate, Neutron Imaging at Oak Ridge National Laboratory (ORNL)'s High Flux Isotope Reactor (HFIR) and Spallation Neutron Source (SNS), Chemical and Engineering Materials Division, Oak Ridge National Laboratory.

• My research at ORNL mainly focuses on multi-scale characterization of additively manufactured components (particularly Inconel 718) and a variety of structural and engineering materials (ferritic/austenitic steels, Ti-/Mg-/Al-based alloys, metallic glass composites, high-entropy alloys, and etc.) using neutron imaging and neutron diffraction techniques at spallation neutron source (SNS), such as, microstructural evolution, crystalline plane orientation, single crystal quality, and residual stress.

2011-2016            

  Graduate Research Assistant, Department of Materials Science and Engineering, The University of Tennessee, Knoxville.

• Dissertation Title: Microstructure and creep deformation behavior of a hierarchical-precipitate-strengthened ferritic alloy with extreme creep resistance (Advisor: Prof. Peter K. Liaw).

• I contributed to preparing a proposal of a DOE project (DOE: DE-FE-0024054), entitled “Computational Design and Performance Prediction of Creep-Resistant Ferritic Superalloys” (total funding amount: $ 625 K for the Two-Year Period of Performance, 10/01/2014-09/31/2016), and was involved in the project, focusing on the development and fabrication of creep resistant materials and studies on the microstructural characterization, using conventional transmission-electron microscopy (CTEM), scanning transmission-electron microscopy (STEM), focused ion-beam microscopy (FIB), electron-back-scattered diffraction (EBSD), scanning-electron microscopy (SEM), atom-probe tomography (APT), advanced neutron diffraction (ND), and high-energy synchrotron X-ray diffraction (HESXRD). Furthermore, as an objective of the DOE program to study creep properties and creep deformation mechanisms, I have performed extensive mechanical tests including room and elevated temperatures compression/tension tests and systematic creep tests, using mechanical testing system (MTS) and dead-load creep machine.

• I have carried out in-situ loading experiments using neutron diffraction at Los Alamos National Laboratory, Oak Ridge National Laboratory (United State America), and Rutherford Appleton Laboratory (United Kingdom) to understand the micro-deformation behavior between constitutive materials during deformation. I conducted the crystal-plasticity finite element model to simulate the experimental in-situ neutron results.   

• I joined a DOE project (DOE: DE-FE0005868) in Aug. 2011, entitled “Computational Design of Creep-Resistant Alloys and Experimental Validation in Ferritic Superalloys” (total funding amount: $ 1,500 K for the Four-Year Period of Performance, 10/01/2010-12/31/2014), and focused on the alloy design/development, microstructural characterization, and creep deformation mechanisms, using SEM, TEM, and advanced neutron/synchrotron diffraction.

• Teaching MSE 201 (Spring, 2014), Introduction of Materials Science and Engineering (lap tour to introduce lap facilities and experimental procedure)

2008-2010            

  Graduate Research Assistant, Department of Materials Science and Engineering, The Sejong University, Korea.

• Thesis Title: Mechanical behaviors of Ti- and Mg-based bimodal eutectic composites (Advisor: Prof. Ki Buem Kim).

• Alloy design and fabrication using arc-suction, induction-melting, and melt-spinning facilities.

• Characterization technique for the analysis and study of microstructural influence by alloying design on mechanical properties of Mg and Ti-based eutectic composites. SEM, UTM, TEM and XRD techniques are used for the study of the microstructure and mechanical properties of eutectic composites.

Tel: +82-41-521-9390

E-mail: gasong@kongju.ac.kr