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Strain-Controlled Thermal-Mechanical Fatigue Behavior and Microstructural Evolution Mechanism of the Novel Cr-Mo-V Hot-Work Die Steel.
Materials (Basel)
January 2025
School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China.
In response to the intensifying competition in the mold market and the increasingly stringent specifications of die forgings, the existing 55NiCrMoV7 (MES 1 steel) material can no longer meet the elevated demands of customers. Consequently, this study systematically optimizes the alloy composition of MES 1 steel by precisely adjusting the molybdenum (Mo) and vanadium (V) contents. The primary objective is to significantly enhance the microstructure and thermal-mechanical fatigue performance of the steel, thereby developing a high-performance, long-life hot working die steel designated as MES 2 steel.
View Article and Find Full Text PDFA novel approach for efficient co-expression of two foreign genes based on the reverse genetic system of Newcastle disease virus.
Front Microbiol
December 2024
Department of Epidemiology, School of Public Health, Harbin Medical University, Harbin, China.
Article Synopsis
- Newcastle disease virus (NDV) serves as a valuable model for studying viral mechanisms and is being utilized as a vector for vaccine development and cancer therapy.
- A reverse genetic system was created for the NDV Mukteswar strain, allowing for the insertion of the enhanced green fluorescent protein (EGFP) gene between the P and M genes to form a stable transcription unit that expresses exogenous genes over multiple generations.
- Through this system, a recombinant virus that co-expresses EGFP and cherry fluorescent protein (CFP) was developed, demonstrating efficient simultaneous expression of both proteins, though with slight differences in expression levels, and similar growth rates with mild virulence attenuation compared to the original strains.
Imaging Strain-Controlled Magnetic Reversal in Thin CrSBr.
Nano Lett
October 2024
Department of Physics, University of Basel, 4056 Basel, Switzerland.
Two-dimensional materials are extraordinarily sensitive to external stimuli, making them ideal for studying fundamental properties and for engineering devices with new functionalities. One such stimulus, strain, affects the magnetic properties of the layered magnetic semiconductor CrSBr to such a degree that it can induce a reversible antiferromagnetic-to-ferromagnetic phase transition. Using scanning SQUID-on-lever microscopy, we directly image the effects of spatially inhomogeneous strain on the magnetization of layered CrSBr, as it is polarized by a field applied along its easy axis.
View Article and Find Full Text PDFStrain-driven skyrmion-bimeron switching in topological magnetic monolayer CrSeBr.
Mater Horiz
October 2024
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandanan Str. 27, Jinan 250100, China.
Skyrmion-bimeron switching is one of the most important phenomena in topological magnetism. Currently, it is usually realized by the annoying spin orientation vertical-reversal through magnetic field. Based on first-principles calculations and atomic spin simulations, we alternatively unveil that the switching between magnetic skyrmions and bimerons can be achieved in topological magnetic monolayer CrSeBr by external strain.
View Article and Find Full Text PDFSuperconducting diode effect under time-reversal symmetry.
Sci Adv
August 2024
Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan.
In noncentrosymmetric superconductors, superconducting and normal conductions can interchange on the basis of the current flow direction. This effect is termed a superconducting diode effect (SDE), which is a focal point of recent research. The broken inversion and time-reversal symmetry is believed to be the requirements of SDE, but their intrinsic role has remained elusive.
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