연구성과 1 페이지 | 포항공과대학교 친환경소재대학원

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연구성과

Total 120건 1 페이지

120

ADL [ADL] Prof. Yoon-Uk Heo: Direct observation of the ledge-typed twin boundary in a martensitic steel The structure at the {112} twin boundaries in martensitic steels has been extensively debated recently. On the one hand, it was claimed to be the omega phase, similar to Ti alloys. On the other hand, it was considered artifacts ind..

작성자 최고관리자 작성일 2023-09-14
119

ADL [ADL] Prof. Yoon-Uk Heo: Role of dislocation climb on twin boundary and antiphase boundary formations in inverse-spinel MnAl2O4 The defects, e.g., stacking faults (SFs), antiphase boundaries (APBs), and twin, have been considered the critical components commonly introduced during the synthesis process of spinel oxides. In this study, employing advanced tran..

작성자 최고관리자 작성일 2023-09-14
118

SSL [SSL] Prof. Sung-Joon Kim: Strong resistance to Zn-assisted liquid metal embrittlement of austenitic-TWIP/martensitic-HSLA multi-layered steel sheets additively manufactured by laser cladding Abstract: As a novel design idea to overcome a shortcoming of liquid metal embrittlement (LME) occurred frequently in twinning-induced plasticity (TWIP) steel, multi-layered steel (MLS) sheets consisting of austenitic TWIP and high-st..

작성자 최고관리자 작성일 2023-09-01
117

SSL [SSL] Prof. Sung-Joon Kim: Barricading Absorbed Hydrogen and Mitigating Hydrogen Embrittlement in High Mn Steel Through Superficial Strain-Induced ε-Martensite Abstract: This study reports a novel result on the effect of strain-induced superficial phase transformation on the mitigating hydrogen embrittlement of an austenitic high Mn steel. The obtained results revealed that the strain-induce..

작성자 최고관리자 작성일 2023-08-14
116

SSL [SSL]Prof. Sung-Joon Kim: Strain hardening analysis and deformation micromechanisms in high strength-high ductility metastable duplex stainless steels: Role of sustained stacking faults in the work ha… Abstract: The present research deals with work hardening analysis of two types (4Mn & 8Mn) high strength-high plasticity metastable duplex stainless steel (DSS). A three-stage (I, II, III) strain hardening rate (SHR) was recognize..

작성자 최고관리자 작성일 2023-08-14
115

SSL [SSL]Prof. Sung-Joon Kim: Correlation between grain size variation and hydrogen embrittlement in a cost-effective Fe40Mn40Ni10Cr10 austenitic medium entropy alloy Abstract: The effect of grain size variation (11 mm, 34 mm) on the hydrogen-induced tensile properties degradation of a Co-free cost-effective Fe40Mn40Ni10Cr10 austenitic medium entropy alloy was investigated using a slow strain rate ..

작성자 최고관리자 작성일 2023-08-14
114

SSL [SSL]Prof. Sung-Joon Kim: Effects of carbon and nitrogen on HallePetch relationship in austenitic stainless steel Abstract: HallePetch relationship was investigated for austenitic stainless steels with either 0.3 wt% C or N. It was found that HallePetch slope was higher for the nitrogen-containing steel, which implied that higher stress was requi..

작성자 최고관리자 작성일 2023-08-14
113

SSL [SSL] Prof. Sung-Joon Kim: Direct comparison of C and N effect on hydrogen embrittlement of stable 17Cr-10Ni-6Mn austenitic stainless steel Abstract : The effects of C and N on hydrogen embrittlement (HE) were investigated in 17Cr-10Ni-6Mn based stable austenitic stainless steels containing 0.2 wt% of either C or N. C and N increased tensile strength by solid solution har..

작성자 최고관리자 작성일 2023-08-14
112

CTL [CTL] Prof. Chang Hee Yim: Evolution of centerline carbides in a martensitic stainless steel slab during reheating treatment The formation and evolution of centerline carbides in a martensitic stainless steel slab are investigated using various characterization techniques. The intensive formation of carbides was observed close to the shrinkage cavity at the..

작성자 최고관리자 작성일 2023-07-26
111

CTL [CTL] Prof. Chang Hee Yim: Mechanism of Surface Corrosion in the Continuous Casting Guide Rolls Due to the importance of the surface on the final slab quality, it is essential to maintain a smooth segment roll surface that is in touch with the thin solid shell during solidification. In this paper, the surface of the used continu..

작성자 최고관리자 작성일 2023-07-26
110

SSL [SSL]Prof. Sung-Joon Kim : Microstructural evolution of liquid metal embrittlement in 1.5-GPa-grade Zn-coated hot-press-forming steels AbstractZn-assisted liquid metal embrittlement (LME) in hot press forming (HPF) steels is attributed mainly to the cracking inside both Zn coating and HPF substrate, but very few studies on how the Zn coating composed of Fe–Zn in..

작성자 최고관리자 작성일 2023-06-08
109

SSL [SSL]Prof. Sung-Joon Kim : Effects of strain rate on tensile ductility in Cu-added stable Fe–Cr–Ni-based austenitic stainless steels AbstractThe mechanical properties of the austenitic stainless steels (ASSs) at high strain rates are receiving significant attention for interpreting the mechanical behavior of automotive members during the severe forming operations.H..

작성자 최고관리자 작성일 2023-06-08
108

SSL [SSL]Prof. Sung-Joon Kim : Martensitic transformation during electrochemical polishing of metastable austenitic stainless steel Abstract We found that remarkable martensitic transformation occurs during electrochemical polishing (EP) in 16Cr-5Ni metastable austenitic stainless steel. It was observed through EBSD measurement that the α’ martensite fraction incre..

작성자 최고관리자 작성일 2023-06-08
107

PEL Prof. Young-Seek Yoon : Rotary hearth furnace for steel solid waste recycling: Mathematical modeling and surrogate-based optimization using industrial-scale yearly operational data AbstractThe presence of zinc in byproduct dust produced during steel production poses a challenge to resource management and can have adverse environmental effects. This study investigates the dezincification behavior of a commercial-scale ..

작성자 최고관리자 작성일 2023-04-05
106

PEL [PEL]Prof. Young-Seek Yoon : Vacuum pressure swing adsorption for efficient off-gas recycling: Techno-economic and CO2 abatement study AbstractWe suggest a vacuum pressure swing adsorption that uses CuCl/Boehmite adsorbent as a novel material to efficiently recycle a blast furnace gas into the blast furnace and discuss the techno-economic and CO2 abatement impact. To ident..

작성자 최고관리자 작성일 2023-04-05
105

EMRL [EMRL]Prof. Kyu-Young Park : Gradational anionic redox enabling high-energy P2-type Na-layered oxide cathode Abstract: Anionic-redox-based layered oxide materials are considered promising cathodes for Na-ion batteries because of their high energy densities. However, the anionic redox reaction at high voltage results in structural instability of th..

작성자 최고관리자 작성일 2023-02-20

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