연구성과 9 페이지 | 포항공과대학교 친환경소재대학원

커뮤니티

연구성과

Total 192건 9 페이지

64

CTL [CTL] Prof. Chang Hee Yim: The effect of Ni depletion on athermal martensitic transformation in 304 austenitic stainless steel Chemical and microstructural analyses were performed on Ni depletion zones in 304 austenitic stainless steelsheets after annealing and cooling with three different rates (0.2, 18.6, 160.0 ◦C/s). The analysis was focused onthe characteristic..

작성자 최고관리자 작성일 2021-08-26
63

CSL [CSL] Prof.Youn-Bae Kang: Thermodynamic Modeling of Liquid Steel Thermodynamic property of liquid steel is often described by activity coefficient of solute in the steel (the other form of partial excess Gibbs energy of the solute). Reliable description of the activity coefficient is required in order to..

작성자 최고관리자 작성일 2021-08-25
62

MML [MML] Prof. F. Barlat: Calibration of Distortional Plasticity Framework and Application to U-draw Bending Simulations A new version of a distortional plasticity framework, the so-called homogeneous anisotropic hardening (HAH), was investigated regarding its calibration and its application to the numerical analysis of the U-draw bend test. First, the mech..

작성자 최고관리자 작성일 2021-08-25
61

MML [MML] Prof. F. Barlat: Performance review of various uncoupled fracture criteria for TRIP steel sheet The exact numerical description of ductile fracture for advanced high strength steel (AHSS) sheets, particularly for different deformation modes, is an ongoing issue for the sheet metal research community at large. Although, in the last few..

작성자 최고관리자 작성일 2021-08-25
60

SNMPL [SNMPL] Prof. Hyoung Seop Kim: Exploration of optimal microstructure and mechanical properties in continuous microstructure space using a variational autoencoder Data-driven approaches enable a deep understanding of microstructure and mechanical properties of materials and greatly promote one's capability in designing new advanced materials. Deep learning-based image processing outperforms conventio..

작성자 최고관리자 작성일 2021-07-21
59

SSL [SSL] Prof. Sung-Joon Kim: Nitrogen effect on hydrogen diffusivity and hydrogen embrittlement behavior in austenitic stainless steels Hydrogen embrittlement behavior of three austenitic stainless steels with 0.1–0.3 wt% N was investigated by electro-chemical charging of hydrogen. The degradation of tensile properties was alleviated by nitro- gen. Hydrogen permeation testi..

작성자 최고관리자 작성일 2020-09-07
58

CML [CML] Prof. Dong Woo Suh:Quenching and partitioning (Q&P) processed medium Mn steel starting from heterogeneous microstructure We examine the microstructure and tensile properties of the quenching and partitioning (Q&P) processed medium Mn steels having different starting microstructure. Heterogeneous Mn distribution led by intercritical annealing prior to the ..

작성자 최고관리자 작성일 2020-09-01
57

CML [CML] Prof. Dong Woo Suh:Analysis of transformation stasis by the Gibbs energy balance (GEB) approach modified to consider carbon redistribution int .… The Gibbs energy balance (GEB) concept for modeling the transformation stasis during isothermal ferrite formationis revisited. Modification has been made to take into account the carbon redistribution into remainingaustenite and the increas..

작성자 최고관리자 작성일 2020-09-01
56

CSL [CSL] Prof.Youn-Bae Kang:Dissolution kinetics of alumina in molten CaO–Al2O3–FetO– MgO–SiO2 oxide representing the RH slag in steelmaking process In order to effectively remove alumina inclusions suspending in ultra-low C steel during RH process, the dissolution kinetics of alumina in molten CaO–Al2O3–FetO–MgO–SiO2 oxide was investigated. A crucible dissolution technique was used ..

작성자 최고관리자 작성일 2020-06-10
55

SNMPL [SNMPL] Prof. Hyoung Seop Kim: A new strategy for designing immiscible medium-entropy alloys with excellent tensile properties Here, a new strategy for designing heterogeneous medium-entropy alloys with light-weight and excellent mechanical properties is proposed. Alx(CuFeMn)100-x (x = 0, 7.5, and 15 at%) alloys were developed by utilizing the immiscible nature ..

작성자 최고관리자 작성일 2020-06-09
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

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