Research on the mechanical properties of C45/S235JR multilayer steel systems

Smart window can be defined as switchable material whose light transmission is altered upon exposure to light, voltage, or heat. However, smart windows are usually produced from expensive and breakable glass materials. Herein, transparent smart window with long-persistent phosphorescence, high optical transmittance, ultraviolet (UV) protection, rigid, high photostability and durability, an d superhydrophobicity was developed from recycled polyester (PET). Recycled polyester waste (RBW) was simply immobilized with different ratios of lanthanide-doped aluminate nanoparticles (LdAN) to provide a long-persistent phosphorescent polyester smart window (LdAN@PET) with an abili ty to persist emitting light for extended time periods. The solid-state high temperature technique was used to prepare lanthanide-doped aluminate (LdA) micro-scale powder. Then, the top-down technique was applied to afford the corresponding LdAN. Recycled shredded recycled polyester bottles were charged into a hot bath to provide a clear plastic shred bulk, which was then well-mixed with LdAN and drop-casted to provide long-persistent luminescent smart window. In order to improve the phosphor dispersion in the PET bulk, LdAN was synthesized in the nanoparticle form which was characterized utilizing transmission electron microscopy (TEM). For better preparation of translucent smart window of long-persistent phosphorescent polyester, LdAN must be homogeneously dispersed in the PET matrix without agglomeration. The morphology and chemical composition were studied by Fourier-transform infrared (FTIR) spectra), X-ray fluorescence (XRF) analysis, scanning electron microscopy (SEM), and energy-dispersion X-ray spectroscopy (EDX). In addition, spectral profiles of excitation and emission, and decay and lifetime were used to better understand the photoluminescence properties. The hardness properties were also investigated. The developed phosphorescent transparent polyester smart window demonstrated a color switch to intense green underneath UV irradiation and greenish-yellow under darkness as verified by CIELab color parameters. The afterglow polyester smart window showed an absorption wavelength at 365 nm and two phosphorescence intensities at 442 and 512 nm. An enhanced UV protection, photostability and hydrophobic activity were detected. The luminescent polyester substrates with lower LdAN ratios demonstrated rapid and reversible

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“…Shore D (Otto Wolpert‐Werke, Ludwigshafen, Germany) was used to test the hardness of the prepared PET sheets. [ 34 ]…”

Section: Methodsmentioning

confidence: 99%

Immobilization of lanthanide doped aluminate phosphor onto recycled polyester toward the development of long‐persistent photoluminescence smart window

et al. 2022

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“…In addition, an experimental study was conducted in [ 13 ] to determine that a certain value of magnetic flux density of about 230 mT is necessary to enable single-pass laser welding without leakage or melt loss for a combination of austenitic stainless steel AISI 304 and steel S235JRC thickness at an oscillation frequency of about 2.6 kHz. Research dealing with mechanical properties of the C45/S235JR multilayer steel system is presented in [ 14 ]. Multilayered steel has been obtained by hot forging and in this way, the system combines the advantages of both materials and reduces the major inconvenience of each material taken separately.…”

Section: Introductionmentioning

confidence: 99%

Testing and Analysis of Uniaxial Mechanical Fatigue, Charpy Impact Fracture Energy and Microhardness of Two Low-Carbon Steels

et al. 2023

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The paper presents and analyzes the results of experimental tests performed on two non-alloy low carbon steels (1.1141 and 1.0122) in cases of their exposure to impact fracture energy and uniaxial high cyclic mechanical stress-controlled fatigue. The experimental results provide insight into the changes in the Charpy impact fracture energy of the V-notched test specimen that occur as a result of temperature changes. The experimental results also provide insight into the mechanical response of the tested materials to mechanical uniaxial high-cycle fatigue at room temperature in an air atmosphere and at different applied stress ratios. Material fatigue tests refer to symmetric (R = −1), asymmetric (R = −0.5) and pulsating tensile (R = 0) cycles. The test results are shown in the S–N diagrams and refer to the highest applied stresses in relation to the number of failures at a given stress ratio. Using the modified staircase method, the fatigue limit (endurance limit) was calculated for both tested materials at each prescribed stress ratio. For both tested steel alloys, and at prescribed stress ratios, the fatigue limit levels (σ_f) are shown as follows: for steel C15E+C (1.1141)→σf250.8R=−1; 345.4R=−0.5; 527R=0MPa; and for steel S235JRC+C (1.0122)→ σf[202R=−1; 310R=−0.5; 462R=0]MPa. All uniaxial fatigue tests were performed on unnotched, smooth, highly-polished specimens. The microhardness of both materials was also tested.

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“…The discovery of new materials with special properties, against the background of resource depletion and the need to recycle existing materials, always arouses the interest of researchers [1][2][3][4][5][6][7][8][9][10][11][12][13][14] around the world. The production of light-resistant materials, which is necessary for the aeronautical, naval, energy, electrical, and electronic industries, pushes research towards the association of materials with completely different properties [15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Studies on Hot-Rolling Bonding of the Al-Cu Bimetallic Composite

et al. 2022

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Through the approaches in this article, an attempt was made to analyze the bonding of Al-Cu bimetallic composite layers and the highlight of the diffusion at the boundary between the layers, by hot rolling. An aluminum alloy 6060 plate (EN-AW AlMgSi) and a Cu-ETP ½ hard (CW004A) plate were used. All of these layers of materials were TIG-welded, at both ends, into a heat-treated layered composite and subsequently subjected to the hot-rolling process. The Al-Cu composite material obtained was analyzed by scanning electronic microscopy (SEM) analysis, after being subjected to the tensile test, as well as energy-dispersive X-ray (EDX) analysis. The obtained results highlighted the diffusion at the boundary between the layers of the Al-Cu composite as well as its ductile breakage and the distribution of the amount of Al and Cu at the interface of the layers.

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Research on the mechanical properties of C45/S235JR multilayer steel systems

Cited by 3 publications

References 15 publications

Immobilization of lanthanide doped aluminate phosphor onto recycled polyester toward the development of long‐persistent photoluminescence smart window

Immobilization of lanthanide doped aluminate phosphor onto recycled polyester toward the development of long‐persistent photoluminescence smart window

Testing and Analysis of Uniaxial Mechanical Fatigue, Charpy Impact Fracture Energy and Microhardness of Two Low-Carbon Steels

Studies on Hot-Rolling Bonding of the Al-Cu Bimetallic Composite

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