To address the problem of poor recognition success rate (RSR) of low probability of intercept (LPI) radar signals such as polyphase codes at low signal-to-noise ratio (SNR), In this paper, we propose a method of deep ...
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In marine environment, sea salt and calcium-magnesium-alumina-silicate (CMAS) coexist largely endangering thermal barrier coatings (TBCs) service safety. In this study, the corrosion behavior of synthetic sea salt and...
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The microstructure evolution and tensile behavior of a novel Ti2AlNb alloy (Ti-22Al-23Nb-1Mo-1Zr) processed by two-pass hot extrusion and two-step heat treatment were investigated. After extruding deformation in the B...
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The Burgers orientation relationship commonly observed during β→α transformation in titanium alloys exhibits an angular deviation in crystallographic orientation. Determining the possible angular deviations and gov...
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Exotic electric polarization-related phenomena have recently been reported in layered van der Waals material such as CuInP2S6 and its derivatives, but the physical origin for such behaviors, especially the formation o...
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Exotic electric polarization-related phenomena have recently been reported in layered van der Waals material such as CuInP2S6 and its derivatives, but the physical origin for such behaviors, especially the formation of quadrupole-well ferroelectric states and the anomalous polarization switching between these states, has not been clearly understood. Here, we provide a simple theoretical explanation using group theory analysis, highlighting the role of local symmetry-determined orbital interactions between copper ions and surrounding ligands. Based on this theory, we predict a surprising effect: carrier doping, which is commonly believed to suppress electric polarization, can lead to enhanced polarization in CuInP2S6. Our first-principles simulations confirm this unusual effect and further show that an elevated hole doping level can cause electric polarization to give way to emerging ferromagnetism. Our results not only pave a way to realize ferroelectric metals, but also broaden the scope of magnetoelectric coupling mechanisms and may help enrich the potential applications of layered ferroelectric materials in the future.
This study investigated the effect of Pt-Al coating on the fatigue behavior of a second-generation single-crystal superalloy (DD5) at different temperatures. The Pt-Al bond coat was deposited on the superalloy, and ro...
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Inconel 718 is a Ni–Fe-based superalloy widely used in aerospace engines because of its excellent mechanical ***,the inferior stability of theγ″phase limits the application of Inconel 718,which coarsens rapidly at ...
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Inconel 718 is a Ni–Fe-based superalloy widely used in aerospace engines because of its excellent mechanical ***,the inferior stability of theγ″phase limits the application of Inconel 718,which coarsens rapidly at temperatures greater than 650°*** improving the temperature tolerance of Inconel 718 requires optimization of the phase configuration via modification of the alloy’s chemical *** the aforementioned objective,this work was conducted to study the precipitation behavior and thermal stability of the strengthening phases with various structures in modified Inconel 718 alloys by tailoring the Al/Ti *** increasing Al/Ti ratio,three particle configurations were formed:γ′/γ″composite,isolatedγ′,andγ′/γ″/γ′composite *** results of aging tests demonstrate that the isolatedγ′and theγ′/γ″/γ′composite structure exhibited better thermal stability at temperature as high as 800°*** isolatedγ′exhibited a reduced coarsening rate compared with theγ′/γ″/γ′composite particles because the isolatedγ′phase was rich in Al,Ti,and ***,theγ′/γ″composite particles coarsened and decomposed rapidly during aging at temperatures greater than 700°C because of the lower stability resulting from the larger number ofγ″*** obtained results provide necessary data for the compositional optimization of novel 718-type alloys.
The bond-based peridynamic (BB-PD) theory is inadequate in describing the four independent engineering material constants of composite lamina, which results in fixed values its Poisson’s ratios and shear moduli. This...
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