연구성과 8 페이지 | 포항공과대학교 친환경소재대학원

커뮤니티

연구성과

Total 158건 8 페이지

46

SSL [SSL] Prof. Sung-Joon Kim: Effect of grain size on hydrogen embrittlement in stable austenitic high-Mn TWIP and high-N stainless steels Two stable austenitic steels, 20Cr-11Ni-5Mn-0.3N (wt%) stainless steel (STS) and 18Mn-1.5Al-0.6C (wt%) twinning-induced plasticity steel (TWIP), were investigated to understand the effect of grain size on hydrogen embrittlement (HE). Grain ..

작성자 최고관리자 작성일 2019-12-31
45

ADL [ADL] Prof. Yoon-Uk Heo: Embrittlement mechanism in a low-carbon steel at intermediate temperature Embrittlement behaviors were studied in a cast steel that bears a relatively large proportion of alloying elements (Mn, Cu, Nb, Ni) at intermediate temperatures. A low-carbon cast steel was heated to 1673 K (1,400 °C) of 10 K/s, then coole..

작성자 최고관리자 작성일 2019-11-28
44

MCL [MCL] Prof. Nack Joon Kim: Effect of annealing conditions on the microstructure and tensile properties of 0.5 V containing Fe-16Mn-0.8C-0.5Si steel Microstructure and tensile properties of Fe-16Mn-0.8C-0.5Si-0.5 V steel subjected to various annealing conditions have been investigated. Our results show that there is a precipitation of fine VC with a small amount of Fe3C during annealing..

작성자 최고관리자 작성일 2019-10-30
43

MCL [MCL] Prof. Nack Joon Kim: Designing a magnesium alloy with high strength and high formability Although magnesium alloys, as the lightest structural alloys, offer significant potential for automotive applications, their applications remain limited due to their poor formability at room temperature. Since the strategies used for improv..

작성자 최고관리자 작성일 2019-10-30
42

CTL [CTL] Prof. Chang Hee Yim: Defect Formation Mechanism on the Surface of Cu-alloyed Steel During Heavy Plate Rolling .

작성자 최고관리자 작성일 2019-09-29
41

CSPL [CSPL] 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 on structural changes in a Na2O-CaOAl..

작성자 최고관리자 작성일 2019-08-23
40

CSL [CSL] Prof. Youn-Bae Kang: Influence of Al/Ti Ratio in Ti-ULC Steel and Refractory Components of Submerged Entry Nozzle on Formation of Clogging Deposits Nozzle clogging during continuous casting of Ti-ULC (Ultra Low C) steel was investigated by inspections of plant-used SENs and laboratory scale experiments using a rotating finger method. Various Al/Ti ratios in the steel and different kind..

작성자 최고관리자 작성일 2019-07-24
39

EML [EML] Prof. Sung-Mo Jung: Morphology of Iron and Agglomeration Behavior During Reduction of Iron Oxide Fines The morphology of iron and agglomeration behaviour in the reduction progress of iron oxide fines were investigated in terms of isothermal reduction at 800 °C in an atmosphere of CO and H2. Agglomeration index was employed to evaluate the ag..

작성자 최고관리자 작성일 2019-06-21
38

PSL [PSL] Prof. Eul-Bum Lee: Risk Assessment and Mitigation Model for Overseas This paper presents an analytic hierarchy process (AHP)-fuzzy inference system (FIS) model to aid decision-makers in the risk assessment and mitigation of overseas steel-plant projects. Through a thorough literature review, the authors iden..

작성자 최고관리자 작성일 2019-05-14
37

PSL [PSL] Prof. Eul-Bum Lee: The Efficacy of the Tolling Model’s Ability to Improve To overcome profitability deterioration in executing steel price projects, companies are seeking overseas expansion, which increases market size while reducing profit certainty. Special purpose companies (SPCs) have been found to better man..

작성자 최고관리자 작성일 2019-05-14
36

MRL [MRL] Prof. Chong Soo Lee: Effect of grain boundary engineering on hydrogen embrittlement in Fe-Mn-C TWIP steel at various strain rates The influence of strain rate (10−3≤ε˙ ≤10−5 s−1) on hydrogen embrittlement behavior of Fe−17Mn−0.8C (wt.%) TWIP steel was investigated. Two types of specimens were tested; one (AR) was hot-rolled, and the other (GBE) was further processed b..

작성자 최고관리자 작성일 2019-03-31
35

MML [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 was investigated while focusi..

작성자 최고관리자 작성일 2019-02-28
34

MML [MML] Porf. F. Barlat: Identification of Dynamic Flow Stress Curves Using the Virtual Fields Methods: Theoretical Feasibility Analysis An inverse approach based on the virtual fields method (VFM) is presented to identify the material hardening parameters under dynamic deformation. This dynamic-VFM (D-VFM) method does not require load information for the parameter identific..

작성자 최고관리자 작성일 -0001-11-30
33

MML [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 was investigated while focusi..

작성자 최고관리자 작성일 2019-02-28
32

MML [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 due to slip activity and latent..

작성자 최고관리자 작성일 2019-02-28
31

MML [MML] Prof. F. Barlat: Advanced constitutive modeling of advanced high strength steel sheets for springback prediction after double stage U-draw bending 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-draw bending process in red..

작성자 최고관리자 작성일 2019-02-28

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