Hall-Petch relationship was investigated for austenitic stainless steels with either 0.3 wt% C or N. It was found that Hall-Petch slope was higher for the nitrogen-containing steel, which implied that higher stress was required to activate the dislocation source in adjacent grains. It was suggested that the nitrogen in the steel generated slip plan...
Accept 논문 / 1 / 1 / N / scie / scopus
Investigations of dynamic deformation and ballistic performance of ultra-high-strength lightweight steels for steel armor applications have not been conducted to date. In this study, effects of boron(B)-doping on ballistic performance were explored in subzero-treated Fe-0.3C-9Mn-5Al and Fe-0.3C-9Mn-5Al-0.005B (wt%) lightweight steels in relation to...
In this study, the deformation behaviors and related microstructural evolutions were investigated in either monotonic or cyclic deformation modes in an interstitial metastable high-entropy alloy. These investigations aimed to reveal the mechanisms underlying the superior low-cycle fatigue (LCF) life of this alloy. A thermomechanical process was app...
10.1039/d1ta10228a / JOURNAL OF MATERIALS CHEMISTRY A / 10 / 9 / 4960-4973
We report the sediment features of the 2018 Palu tsunami in Indonesia based on the results of laboratory analysis. The mechanism for generating the 2018 Palu tsunami was a combination of an earthquake and a landslide, and several previous studies classified the tsunami as having a shorter wavelength and period. The characteristics of the deposits o...
Mg-Al-Zn-Ca-Y alloys with excellent ignition and corrosion resistances-termed SEN alloys (where the letters "S," "E," and "N" stand for stainless, environmentally friendly, and non-flammable, respectively)- have been developed recently. In this study, the microstructure, tensile properties, and high-cycle fatigue properties of an extruded Mg-9.0Al-...
© 2021 Elsevier LtdWe report the mechanical and microstructural characteristics of a medium-entropy alloy, Co17.5Cr12.5Fe55Ni10Mo5 (atomic percent, at%) at cryogenic temperatures, down to a record low temperature of 0.5 K. The alloy exhibits excellent strength and ductility combined with a high strain-hardening rate in the entire temperature range ...
A breakthrough in the strength and ductility trade-off is crucial for the development of advanced metallic materials. Herein, we present a novel heterostructured composite composed of immiscible magnesium (Mg) and ferrochrome (FeCr) with a 3D interconnected morphology and synthesized by liquid metal dealloying. Soft Mg and hard FeCr zones mutually ...
To investigate mercury (Hg) sources responsible for contamination at Gumu Creek in South Korea, Hg concentration (THg) and Hg isotope ratios were measured in the soil and sediment of Gumu Creek and the samples from a hazardous waste landfill (HWL). The THg ranged between 0.29–327 mg kg−1 and 9.5–414 mg kg−1 in the soil and sediment, respectively, r...
