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Article
Open AccessPeriodic spinodal decomposition in double–strengthened medium–entropy alloy
Achieving an optimal balance between strength and ductility in advanced engineering materials has long been a challenge for researchers. In the field of material strengthening, most approaches that prevent or ...
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Article
Microscopic Study on the Blister Formation Mechanism in Electrogalvanized Steel
The blister formation mechanism in electrogalvanized steel was studied by analyzing the blister’s internal structure. Electrochemical hydrogen charging was employed to absorb hydrogen into the steel plate and ...
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Article
Open AccessEPMA quantification on the chemical composition of retained austenite in a Fe-Mn-Si-C-based multi-phase steel
An electron probe X-ray microanalyzer (EPMA) is an essential tool for studying chemical composition distribution in the microstructure. Quantifying chemical composition using standard specimens is commonly use...
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Article
Open AccessMechanically derived short-range order and its impact on the multi-principal-element alloys
Chemical short-range order in disordered solid solutions often emerges with specific heat treatments. Unlike thermally activated ordering, mechanically derived short-range order (MSRO) in a multi-principal-ele...
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Article
Kinetic Model to Investigate the Effect of Cooling Rate on δ-Ferrite Behavior and Its Application in Continuous Casting of AISI 304 Stainless Steel
The prediction of M-shaped δ-ferrite content along the thickness direction of continuously cast 304 austenitic stainless steel slab was performed using a diffusion-controlled phase transformation module of The...
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Article
Open AccessComparative study on the specimen thickness measurement using EELS and CBED methods
Two thickness measurement methods using an electron energy loss spectroscopy (EELS) and 10a convergent beam electron diffraction (CBED) were compared in an Fe-18Mn-0.7C alloy. The thin foil specimen was firstl...
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Article
Open AccessRationally designed bimetallic Au@Pt nanoparticles for glucose oxidation
Bimetallic nanoparticles (NPs) have aroused interest in various fields because of their synergetic and unique properties. Among those nanoparticles, we strategically approached and synthesized Au@Pt NPs via the s...
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Article
Determination of Yield Stress in a Duplex Steel with α + γ Lamellar Structure
Yield stress σy is evaluated in a duplex steel with α + γ lamellar structure by calculating the stress for the propagation of pile-up dislocations in one phase into another phase. Effective grain size of a lamell...
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Article
Tempering Behavior of TiC-Reinforced SKD11 Steel Matrix Composite
TiC-reinforced SKD11 steel matrix composite, fabricated by a pressure infiltration casting, undergoes monotonic decrease in hardness as tempering temperature increases. Element map**s by TEM–EDS and thermody...
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Article
Deformation Behavior in Medium Mn Steel of Nanometer-Sized α′ + γ Lamellar Structure
Yielding and work-hardening phenomena in an Fe-10.62Mn-2.84Al-0.17C-0.5Mo steel, which is composed of nanometer-sized lamellae of α′ and γ, are described on the basis of the Hall–Petch relations. Unlike the gener...
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Article
Influence of the Initial Microstructure on the Reverse Transformation Kinetics and Microstructural Evolution in Transformation-Induced Plasticity–Assisted Steel
The reverse transformation behavior upon heating to intercritical temperature was studied in Fe-0.21C-2.2Mn-1.5Si (wt pct) alloy with three initial microstructures. One is the cold-rolled (CR) structure and t...
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Article
Enhanced low-cycle fatigue life by pre-straining in an Fe-17Mn-0.8C twinning induced plasticity steel
Enhancement of low-cycle fatigue (LCF) life was achieved by imposing pre-straining in an Fe-17Mn-0.8C twinning induced plasticity steel. Two different straining methods (uni-axial tension and drawing) were uti...
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Article
Effect of Second Phase on the Deformation and Fracture Behavior of Multiphase Low-Density Steels
The effects of the second-phase characteristics on the deformation and fracture behavior in low-density steel are investigated in Fe-0.2C-(4, 8)Mn-5Al-1Si alloys, where the second phase can be retained austeni...
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Article
Open Access3D Hierarchical Rutile TiO2 and Metal-free Organic Sensitizer Producing Dye-sensitized Solar Cells 8.6% Conversion Efficiency
Three-dimensional (3D) hierarchical nanoscale architectures comprised of building blocks, with specifically engineered morphologies, are expected to play important roles in the fabrication of ‘next generation’...
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Article
Open AccessUltra-High Performance, High-Temperature Superconducting Wires via Cost-effective, Scalable, Co-evaporation Process
Long-length, high-temperature superconducting (HTS) wires capable of carrying high critical current, Ic, are required for a wide range of applications. Here, we report extremely high performance HTS wires based o...
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Article
Controlled Ag-driven superior rate-capability of Li4Ti5O12 anodes for lithium rechargeable batteries
The morphology and electronic structure of a Li4Ti5O12 anode are known to determine its electrical and electrochemical properties in lithium rechargeable batteries. Ag-Li4Ti5O12 nanofibers have been rationally de...
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Article
Kinetic transition during the growth of proeutectoid ferrite in Fe-C-Mn-Si quaternary steel
The kinetics of ferrite growth in Fe-0.1C-1.5Mn-0.94Si (mass pct) quaternary steel is investigated through the characterization of isothermal growth behavior, the thermodynamic prediction of kinetic boundary a...
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Article
Precipitates and Grain Boundary Strength of an Fe-Mn-Ni Alloy
The effect of grain boundary (GB) precipitates on the GB strength of an age-hardened Fe-7.8Mn-8.2Ni alloy was investigated. Premature intergranular fracture was observed after age hardening due to the precipit...
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Article
Influence of Silicon in Low Density Fe-C-Mn-Al Steel
The influence of silicon on the microstructure of a Fe-Mn-Al-C ferritic low-density steel is investigated. The formation of κ-carbide, which is known to be detrimental to ductility, can be suppressed by decrea...
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Article
Open AccessMicroscopic role of carbon on MgB2 wire for critical current density comparable to NbTi
Increasing dissipation-free supercurrent has been the primary issue for practical application of superconducting wires. For magnesium diboride, MgB2, carbon is known to be the most effective dopant to enhance hig...
