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Effect of post heat treatment on microstructure and mechanical properties of hot-rolled AA2017 aluminum alloy.
Heliyon
December 2024
Department of Mechanical, Chemical and Material Engineering, University of Cagliari, Via Marengo 2, 09123, Cagliari, Italy.
This study investigates the effects of heat treatment, involving solubilization and aging, on the microstructure of AA2017-T451 aluminum alloy. Samples of 4 mm thick rolled plate of AA2017 underwent solution treatment at 500 °C for two different durations, namely 2 h and 6 h, followed by either water quenching (WQ) or air quenching (AQ). Subsequently, they were artificially aged (AA) at 175 °C for 8 h.
View Article and Find Full Text PDFA Novel Tensile Fracture Location of Friction Plug Welding (FPW) Joints.
Materials (Basel)
November 2024
School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
The fracture position of a friction plug welding (FPW) joint is typically located at or near the thermo-mechanically affected zone (TMAZ). Here, we found that microcracks in all FPW specimens initiate at the deformed plug center (DPC) zone and then propagate through the plug center along 45° shear surfaces, because the lowest hardness occurs at the DPC zone rather than the TMAZ or other zones, and the DPC zone presents a tilt fiber-like microstructure. Such a tilt microstructure stimulates formations and deformations of microvoids and propagation of microcracks along 45° shear surfaces.
View Article and Find Full Text PDFCarbon Nanotube-Based Segregated Thermoplastic Nanocomposites Structured via Electromagnetic Melt Processing.
ACS Omega
December 2024
Department of Chemical Engineering, University of Mississippi School of Engineering, University, Mississippi 38677, United States.
A cutting-edge method that uses electromagnetic (EM) energy for the melt processing of thermoplastic polymer nanocomposites (TPNCs) is reported. The properties and microstructures of TPNCs produced via the proposed EM-processing method and TPNCs via conventional heat processing are contrasted. The EM-processed TPNCs prepared with EM-susceptible carbon nanotubes (CNTs) exhibited a significant enhancement in transport and mechanical properties, outperforming the conventionally processed TPNCs.
View Article and Find Full Text PDFEnhancement and Compatibilization of Waste-Sourced Biocomposites Through Elastomer Blending and Matrix Grafting Modification.
Molecules
October 2024
Guangxi Key Laboratory of Advanced Microwave Manufacturing Technology, Guangxi Academy of Sciences, Nanning 530007, China.
A novel elastomer-modified multicomponent, multiphase waste-sourced biocomposites, was prepared for converting waste biomass and plastic into value-added products. The effects of blending elastomer-olefin block copolymer (OBC) and maleic anhydride (MAH), and divinylbenzene (DVB) co-grafting of recycled polypropylene (rPP) matrix on the adhesion interface, structure, and properties of high wood flour-filled (60 wt.%) composites were thoroughly investigated.
View Article and Find Full Text PDFAn Approach to Testing Antivandal Composite Materials as a Function of Their Thickness and Striker Shape-A Case Study.
Polymers (Basel)
February 2024
Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, Poland.
Our research material comprised antivandal fire-retardant hybrid composites modified with inorganic and organic fillers intended for application in public transport vehicles. This paper presents an approach to studying their impact strength as a function of the composite thickness (3 to 6 mm) and striker shape (hemispherical, semicylindrical, wedge-shaped) used in the experimental stand. Group A composites, made of single fabric layers ( = 5), were thinner and their impact strength was lower by 73% than that for Group B composites made of double fabric layers.
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