[MML] Prof. F. Barlat: Influence of Yield Stress Determination in Anisotropic Hardening Model on Springback Prediction in Dual-Phase Steel In this study, a numerical sensitivity analysis of the springback prediction was performed using advanced strain hardening models. In particular, the springback in U-draw bending for dual-phase 780 steel sheets…
[MML] Prof. F. Barlat: A crystal plasticity model for describing the anisotropic hardening behavior of steel sheets during strain-path changes In the present study, a viscoplastic self-consistent crystal plasticity model (VPSC-RGBV), which accounts for various microstructural features, including the accumulation and annihilation of dislocations d…
[MML] Prof. F. Barlat: Advanced constitutive modeling of advanced high strength steel sheets for springback prediction after double stage U-draw bendi… In this study, a U-shaped channel formed using a double drawing process (double stage U-draw bending) was proposed to reduce the amount of springback in the AHSS sheets. The performance of the double stage U-dr…
[MML] Prof. F. Barlat: Anisotropic Plasticity and Application to Plane Stress (Encyclopedia) DefinitionsPlasticity is the ability of a material to deform in an irreversible manner. Unlike elasticity for which deformations are reversible, plasticity leads to permanent shape changes after a sufficient lo…
[CML] Prof. Dong-Woo Suh: Influence of initial microstructures on intercritical The present work reports the effect of different initial microstructures on reverse transformation kinetics and morphologies of austenite formed during intercritical annealing in Fe-0.14C-7Mn-1Si (wt-%)mediumMn…
[CML] Prof. Dong-Woo Suh: Effect of Prior Austenite Grain Size on Hole Expansion Ratio The effect of the prior austenite grain size (PAGS) on the tensile properties and hole expansion ratio (HER) has been investigated. Starting from different PAGS values (4.7 lm and 15.2 lm) obtained by controll…
[CTL] Fazlollah Sadeghi: Optimizing Grain Selection Design in the Single-Crystal An attempt is made to model the design of grain selection during single-crystal solidification of an Ni-based superalloy by the Bridgman method. Various geometrical designs of the starter block and spiral…
[SSL] Prof. Sung-Joon Kim: Effects of carbon and nitrogen on austenite stability and tensile deformation The austenite stability and deformation behavior of 15Cr-15Mn-4Ni based austenitic stainless steels alloyed with C or N are studied. Stability of austenite against martensitic transformation was enhanced …
[SSL] Prof. Sung-Joon Kim: Fe-Zn reaction and its influence on microcracks during hot tensile Fe-Zn reaction was investigated by annealing a galvanized 22MnB5 steel sheet at 500–900 ° C for 5 min. The observed Fe-Zn intermetallic compounds within the coating depended on the annealing temperature.…
[ADL] Prof. Yoon-Uk Heo: Determination of Yield Stress in a Duplex Steel with a + c Lamellar Structure Yield stress ry is evaluated in a duplex steel with a + c lamellar structure by calculating the stress for the propagation of pile-up dislocations in one phase into another phase. Effective grain size of a lam…
[ATL] Prof. Yang Mo Koo: Effect of Al content on Magnetic Domains of {100} Grains in Electrical Steels Magnetic domains of {100} grains in electrical steels with 1.85 ≤ Al ≤ 6.54 wt. % were observed by magneto-optic Kerr microscopy. The characteristics and motion of magnetic domains were correlated with h…
Prof. Se-Kyun Kwon, "Why High-Entropy Alloys Should Take Center Stage (POSCO Global Newsroom) This article is from POSCO Global Newsroom > Featured > POSCO Reports https://newsroom.posco.com/en/why-high-entropy-alloys-should-take-center-stage/Why High-Entropy Alloys Should Take…
[CTL] Prof. Jung-Wook Cho: oxide metallurgy during AM In laser metal deposition (LMD) process, meltpool oxidation is inevitable due to high working temperature, which results in finely dispersed non-metallic inclusions in the steel matrix. In this paper, cha…
[CTL] Prof. Jung-Wook Cho: Thermal history driven molecular structure transitions in alumino-borosilicate glass The glass network structure governs various thermos-physical properties such as viscosity, thermal, and electrical conductivities, and crystallization kinetics. We investigated the effect of temperature o…
[CSL] Prof. Youn-Bae Kang: ISIJ International, Vol. 58(2018), No. 7, pp.1257-1266 In order to elucidate possible mechanism causing nozzle clogging during continuous casting of Ti added Ultra Low C (Ti-ULC) steel, thermodynamic analysis and experimental validation were carried out with …
