Pohang University of Science and Technology · Engineering
Professor Dong-Woo Suh's research lab specializes in the microstructural design and mechanical behavior of advanced high-strength steels, with a focus on microalloyed and transformation-induced plasticity (TRIP) steels. The lab investigates phase transformations, precipitate evolution, and solute effects—particularly in Ti/Nb/Mo and Al-containing systems—to enhance strength, toughness, and resistance to hydrogen embrittlement. Key research directions include interfacial engineering, solute segregation, and the development of advanced joining techniques such as spot welding in complex-phase steels.
Figures are computed from collected data and may differ slightly.
The interphase precipitation of carbides has been studied in two microalloyed steels containing Ti and Nb, but only one of which contains molybdenum. The precipitates obtained are, therefore, (Ti,Nb)C and (Ti,Nb,Mo)C respectively. It is found that molybdenum significantly reduces the size of the carbide precipitates and also strongly retards their coarsening behaviour during subsequent heat treatment. This is because it enhances the nucleation rate by reducing the interfacial energy, but it is n
Abstract It is known empirically that the addition of aluminium as a solute in high-Mn austenitic steels dramatically improves their resistance to hydrogen-induced embrittlement. A variety of experimental techniques, including the characterization of trapping sites and high-resolution observation of fracture facets, have been used to reveal the mechanism by which aluminium induces this effect. It is found that transgranular fracture is promoted by the segregation of hydrogen to mechanical twin i
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