연구성과 5 페이지 | 포항공과대학교 철강·에너지소재대학원

커뮤니티

연구성과

Total 105건 5 페이지

41

CTL [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 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
30

MML [MML] Prof. F. Barlat: Anisotropic Plasticity and Application to Plane Stress (Encyclopedia) Definitions Plasticity 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 load is applied to a mater..

작성자 최고관리자 작성일 2019-02-28
29

CML [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-%)mediumMnsteel. Three different initial..

작성자 최고관리자 작성일 2019-01-28
28

CML [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 controlling the austenitizing temperatu..

작성자 최고관리자 작성일 2019-01-28
27

CTL [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 grain selector are chosen and their..

작성자 최고관리자 작성일 2018-12-31
26

SSL [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 with increasing C or N content, whil..

작성자 최고관리자 작성일 2018-12-31

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