연구성과 10 페이지 | 포항공과대학교 친환경소재대학원

커뮤니티

연구성과

Total 198건 10 페이지

54

ADL [ADL]Prof. Yoon-Uk Heo: Accurate determination of orientation relationship between ferrite and (Fe, Mn)3AlC in an Fe-Mn-Al-C eutectoid alloy The orientation relationship between ferrite and (Fe,Mn)3AlC has been investigated in an Fe-3.5Mn-5.8Al-1.05C based eutectoid alloy. Electron diffraction pattern analysis shows two possible orientation relationshipsbetween both phases. Accu..

작성자 최고관리자 작성일 2020-05-18
53

MRL [MRL] Prof. Chong Soo Lee: Improved cold-rollability of duplex lightweight steels utilizing deformation-induced ferritic transformation The Fe–Mn–Al–C duplex lightweight steels have received considerable attention from the automotive industry because of their low density and good mechanical performance. However, their poor cold-rollability limits their applications. This st..

작성자 최고관리자 작성일 2020-03-31
52

MRL [MRL] Prof. Chong Soo Lee: Comparative study on the effects of Cr, V, and Mo Carbides for hydrogen-embrittlement resistance of tempered martensitic steel In this study, the ideal alloying element (among Cr, V, and Mo carbides) to enhance the resistance to hydrogen embrittlement (HE) in a tempered martensitic steel was investigated. Four types of steels were designed to contain cementites, Cr..

작성자 최고관리자 작성일 2020-03-31
51

MML [MML] Prof. F. Barlat, Determining the coefficients of a homogeneous anisotropic hardening model for ultrathin steel sheets In the present work, the constitutive description of a 0.1-mm-thick ferritic stainless steel sheet was optimized for application to springback simulations after bending. Springback simulations require Bauschinger effects to be characterized..

작성자 최고관리자 작성일 2020-02-23
50

MML [MML] Prof. F. Barlat, Failure characteristics of advanced high strength steels at macro and micro scales The advanced high strength steels (AHSS) have gained major attention from research groups across the world especially in the last two decades. The exact description of the forming behavior of these steels has several challenges associated w..

작성자 최고관리자 작성일 2020-02-23
49

CML [CML] Prof. Dong Woo Suh: Hydrogen Behavior in Ti-Added Reduced Activation Ferritic-Martensitic Steels Hydrogen behavior and corresponding mechanical degradation were examined in TaTi-RAFM and EUROFER97 steels. Increased Ta content with Ti addition decelerates the hydrogen diffusion but increases the solubility in the lattice. It is mainly l..

작성자 최고관리자 작성일 2020-01-30
48

CML [CML] Prof. Dong Woo Suh Austenite Morphology and resistance to hydrogen embrittlement in medium Mn transformation-induced plasticity steel Influence of austenite morphology on the hydrogen embrittlement in mediumMn transformation-induced plasticity (TRIP) steelwas investigated.With nearly the same volume fraction andmechanical stability, the lath-type austenite is found to hav..

작성자 최고관리자 작성일 2020-01-30
47

SSL [SSL] Prof. Sung-Joon Kim: Enhancement of tensile properties by room-temperature quenching and partitioning of 0.2C-10Mn-2Al steel Processing conditions better than those of conventional quenching and partitioning process are suggested for 0.2C–10Mn–2Al steel. The steel can retain 24% of austenite on quenching to room temperature and effectively partition carbon from m..

작성자 최고관리자 작성일 2019-12-31
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

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