Using additive friction stir deposition (AFSD), the poor weldability of 1045 steel can be solved, facilitating efficient and high-performance manufacturing its components. This study selected spherical powder investigated key factors influencing mechanical properties, including temperature, tool rotational rate, axial force. The results showed that dynamic recrystallization (DRX) occurred in AFSD steel, which produced randomly oriented fine equiaxed grains with a size range 1–3 µm was...

This work analyzed changes in the corrosion morphology and mechanical performance of 7085 aluminum alloy after outdoor exposures for different times a humid hot marine atmospheric environment. After one month exposure, pronounced was observed. The product mainly Al(OH)3, features were pitting intergranular (IGC). With exposure time extended from 6 months to 12 months, IGC depth increased 114 μm 190 μm. 1-year environment, alloy’s ultimate strength yield stress remained nearly unchanged,...

This study aimed to investigate the impact of corrosion on microstructure and tensile properties 7075 high-strength alloy. It involved outdoor exposure tests in an actual marine atmospheric environment Wanning, Hainan Province. The results showed that alloy was corroded rapidly environment, pits intergranular cracks were generated. extended along grain boundary during corrosion, leading exfoliation matrix. cause for discussed based characteristics gradually deteriorated with increase time...

Actual marine atmospheric pre-corrosion behavior and its effect on the fatigue performance of 7075-T73 aluminum alloy were studied by means outdoor exposure testing testing. The surface cross-sectional microstructures specimens after different numbers days analyzed. Localized pitting, intergranular exfoliation corrosion occurred during in a atmosphere. degree severity increased with increasing duration exposure. effects Fe-rich constituent particles (Al23CuFe4) grain boundary precipitates...

The formation and evolution of shear bands in Inconel 718 nickel-base superalloy under plane strain compression was investigated the present work. It is found that propagation more intense comparison with conventional uniaxial compression. morphology identified to generally fall into two categories: “S” shape at severe conditions (low temperatures high rates) “X” mild (high low rates). However, uniform deformation mesoscale without also obtained by compressing 1050 °C/0.001 s−1. By using...

The metadynamic recrystallization (MDRX) of β-solidified TiAl alloy and its effects on microstructural homogeneity were investigated in the present work. Based comprehensive microstructure characterizations terms scanning electron microscope back-scattered (BSE) mode back scattered diffraction (EBSD) technique, it is found that occurrence MDRX during post-annealing process after hot compression leads to decomposition lamellar colonies, grain equalization reduction geometrically necessary...

The objective of this work was to study the corrosion behavior 2xxx aluminum alloys in marine environment and degradation mechanical properties caused by as well provide support for lightweight design equipment. characteristics 2297-T8 2195-T8 were observed scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS) at 3, 6, 9, 12 months exposure, obtained via uniaxial tensile testing. results showed following: (1) With an increase exposure time, products on surface gradually...

A series of cage-like double perovskite-type hybrid perovskites, (HQ)2[B′Bi(NO3)6] (HQ = quinuclidinium cation, B′ K, 1; Rb, 2; Cs, 3), were obtained. In the cages, Bi3+ ions are dodecahedrally coordinated by six NO3– ligands in a bidentate mode; meanwhile, each alkali metal ion is chelated O atoms from neighboring ions. The HQ exists anionic cage through intermolecular interactions, which mainly refers to hydrogen-bonding interactions. They display structural phase transitions between 200...

The dynamic recrystallization (DRX) behavior of Ti-45Al-8.5Nb-0.2W-0.2B-0.3Y (at %) alloy has been investigated through hot compression tests. tests were executed at a temperature range 1000–1200 °C and strain rate 0.001–1 s−1 under true 0.9. It was found that the α2 phase which is produced during heat treatment reduced due to thermo-mechanical coupling. value activation energy 506.38 KJ/mol. With increase in deformation decrease rate, DRX more likely occur, as result sufficient time for...

The actual marine corrosion behavior and tensile properties of 2195 alloy 2297 in T8 state were studied by means environment outdoor exposure testing. cross-sectional macro morphologies the alloys after for different times analyzed. results indicated that possessed poor marine-corrosion resistance rapidly corroded an environment. grain-interior (GIC) was main mechanism alloy, leading a lot corrosive holes. Moreover, reasons GIC discussed through microstrcuture analysis. Additionally, trend...

Effects of actual marine atmospheric precorrosion and prefatigue on the fatigue property 7085-T7452 aluminum alloy were investigated by using methods outdoor exposure tests constant amplitude axial tests. Marine corrosion morphologies, life, fractography analyzed. After three months exposure, both pitting intergranular (IGC) occurred, while latter was dominant mode. could result in a dramatical decrease life as-received alloy, selective can improve total precorroded specimen. The mechanism...

A promising arc enhanced glow discharge (AEGD) was developed to enhance hot corrosion resistance of NiCoCrAlY/AlSiY coating. The AlSiY layer exhibited loose texture accompanied by plenty pores, which triggered the muti-scale diffusion salt mixture resulting in severe degradation coating and rapid NiCoCrAlY layer. However, AEGD-assisted showed dense texture, effectively prevented suppressed reaction as well results confirmed that AEGD a huge potential inhibit damage thermal protective coatings.

The ocean is one of the essential fields national defense in future, and more attention paid to lightweight research Marine equipment materials. This study it develop a Machine learning (ML)-based prediction method evolution mechanical properties Al-Li alloys marine environment. We obtained alloy samples under uniaxial tensile deformation at different exposure times through experiments. strain by digital image correlation (DIC). field images are voxelized using 2D-Convolutional Neural...

Transition-metal nitride coating used to protect the electronic connector devices in marine environment is required have high electrical conductivity and good corrosion resistance. This study synthesized a novel CrN–Pt with dense growth texture. Pt addition induced pronounced increase The resistivity decreased from 0.0149 Ohm·cm CrN 0.000472 coating, while current density 24 nA/cm2 6.3 coating. results of above studies confirm that doping has significant advantages improving resistance...

This study aims to examine the variation in corrosion characteristics and tensile properties of WE43 magnesium alloy an actual marine atmospheric environment by means outdoor exposure tests. The macroscopic morphology, microstructure, were analyzed. results indicated that will corrode rapidly during under environmental conditions, resulting a loose porous Mg(OH)

A halide based three-dimensional hybrid bimetal perovskite shows a reversible structure phase transition accompanied by switchable dielectric properties which provides new study platform for materials.