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Meeting	MS&T22: Materials Science & Technology
Symposium	Innovative Process Design and Processing for Advanced Structural Materials
Presentation Title	K-4: Development of a Gradient Structural Material Using Electrically Assisted Pressure Joining of Fe-Mn-Al-C Lightweight Steels
Author(s)	Siwhan Lee, Howook Choi, Chanwoo Jeong, Joonoh Moon, Heung Nam Han
On-Site Speaker (Planned)	Siwhan Lee
Abstract Scope	Lightweight steels of Fe-Mn-Al-C system are drawing great attention due to superior mechanical properties. The combination of strength and elongation of Fe-Mn-Al-C steels can be controlled by nano-sized κ-carbide precipitation, which is significantly affected by Si and Mo addition. In this study, a novel structural material with hardness gradient was fabricated by solid-state bonding of two Fe-Mn-Al-C-based lightweight steels containing Mo and Si, respectively, using electrically assisted pressure joining (EAPJ). It was confirmed that the EAPJed material had excellent bonding strength through tensile test. Through EPMA observation, it was observed that Si and Mo diffusion occurred actively into two base materials during EAPJ. Since the addition of Si promotes the precipitation kinetics of κ-carbide whereas Mo retards it, a significant gradient of precipitate distribution was found. As a result, it was possible to fabricate a new structural material with a hardness gradient of about 100 HV in 0.5 mm.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A New Method for Measurement of Flow Stresses at High Strain Rates and Temperatures for Improved Simulation of Friction Stir Welding

A Study on Migrating Boundary Induced Plasticity Using Molecular Dynamics Simulation for Pure Iron

Atomic-scale Unique Interface Observation of η/Al in Al-Zn-Mg Alloy

Co-design of 3D Printing, Parts and Microstructure

Effects of Electric Current on the Plastic Deformation Behavior of Pure Copper, Iron, and Titanium

Electric Current-induced Phenomena in Materials

Enhancement of Mechanical Properties in Nanoporous Gold

Improvement of Mechanical Properties of Metallic Materials by Multilayered Structure

K--8: Effect of Heat Treatment in 9% Ni Steels on Cryogenic Impact Toughness

K-12: Improvement of Structural Stability and Characterization of Nanoscale Defects in Amorphous Alumina Thin Film

K-13: Integrated Welding and Thermal Processing for Ferritic/Martensitic Steels

K-14: MatILDa® - Application of a User-oriented Material Database

K-15: Porous Silicon Carbide (SiC) for Composite Core Sandwich Structures

K-16: Solid-state Bulk Joining of Dissimilar Metal Alloys by Electrically Assisted Pressure Joining

K-17: Study on the Behavior of Fine Particles by the Vibration of the Medium with Polluted Air Inside the Rigid Housing

K-18: The Friction and Product Quality in Dry Metal Forming with Volatile Media

K-2: Automated Process Design for Heat Shrink Casing of Welded Parts of Buried District Heating Pipe

K-4: Development of a Gradient Structural Material Using Electrically Assisted Pressure Joining of Fe-Mn-Al-C Lightweight Steels

K-5: Development of a Self-heated Composite Tool for Out of Autoclave and Out of Oven Cure of Thin Ply Composite Structures

K-6: Development of Highly Stretchable and Impermeable Encapsulation by Applying Wavy-structure to Thermally Grown Silicon Dioxide

K-7: Discontinuous Yielding Behavior Due to Twinning Accompanied by Abnormal Grain Growth in Fine-grained Copper

K-9: Enhanced Flaw-tolerance of Nanoporous Gold with Grain Boundary Plasticity

Manufacture of Advanced 3D Composites Using a New 3D Weaving Technique and Their Design Using a Neural Network

Mechanical Properties and Reliability of Nanolayered Stretchable Interconnect with Nanocrystalline Copper and Ternary Metallic Glass

Mechanisms Driving Defect Formation in High Power Laser Welding of Nickel Alloys

Microstructure-based Fatigue Life Modeling Methodology for Ferritic-pearlitic Hypo-eutectoid Steels

Modern Supercomputing for Accelerating the Design of High-temperature Aluminum Alloys

Monte Carlo Simulations for Microstructure Evolution via Diffusion

Novel Solid-State Metal Powder Fabrication Process for Feedstock of Metal Matrix Composites Additive Manufacturing

On the Micromechanical Response of a Mild Steel during Abrupt Strain Path Changes (SPCs)

Recent Nanoindentation Studies on Innovative Process Design for Advanced Structural Materials

Residual Stress in Steel H-beam Produced by Hot-rolling and QST Investigated by Instrumented Indentation Testing

Structural Evolution during Nanostructuring and Heating of an Additive-manufactured Stainless Steel Examined by X-ray and In-situ Neutron Diffraction Analyses

Uniaxial Tensile Behavior After Baking Treatment in a Low Carbon Steel Accompanying Inhomogeneous Plastic Yielding

Virtual Thermo-mechanical Process Design of Metallic Materials by Integrating Crystal Plasticity and Phase Field Model

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