Metals

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Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications
Metals - Tập 9 Số 9 - Trang 1004
Long Bai, Cheng Gong, Xiaohong Chen, Yuanxi Sun, Junfang Zhang, Lecai Cai, Shengyan Zhu, Sheng Quan Xie
Metals have been used for orthopedic implants for a long time due to their excellent mechanical properties. With the rapid development of additive manufacturing (AM) technology, studying customized implants with complex microstructures for patients has become a trend of various bone defect repair. A superior customized implant should have good biocompatibility and mechanical properties matching th... hiện toàn bộ
Large Magnetic Entropy Change in GdRuSi Optimal for Magnetocaloric Liquefaction of Nitrogen
Metals - Tập 13 Số 2 - Trang 290
А. Г. Кучин, S.P. Platonov, Р. Д. Мухачев, A. V. Lukoyanov, А. С. Волегов, Vasilii Gaviko, M.Yu. Yakovleva
The search for new magnetocaloric materials for application in magnetic refrigerants is highly motivated by high efficiency, reliability, and environmental safety. The values of the magnetocaloric effect MCE and the refrigerant capacity RC for the equiatomic GdRuSi compound were determined to be MCE = 10.7 and 4.94 J/kgK and RC = 336 and 92 J/kg with a change in the field of 0–50 and 0–17 kOe, res... hiện toàn bộ
Sintering Behaviors of Carbon Nanotubes—Aluminum Composite Powders
Metals - Tập 6 Số 9 - Trang 213
Biao Chen, Katsuyoshi Kondoh
Carbon nanotubes (CNTs) are promising reinforcements for fabricating aluminum (Al) matrix composites with outstanding properties. The understanding of the consolidation process of CNT–Al composite powders plays a significant role in achieving high performances of bulk composites. In this study, an advanced consolidation technique of spark plasma sintering (SPS) was used to fabricate CNT–Al composi... hiện toàn bộ
Tensile Properties and Microstructures of a 2024-T351 Aluminum Alloy Subjected to Cryogenic Treatment
Metals - Tập 6 Số 11 - Trang 279
Jianzhong Zhou, Suqiang Xu, Shu Huang, Xiankai Meng, Jie Sheng, Haifeng Zhang, Jing Li, Yunhui Sun, Emmanuel Agyenim-Boateng
The aim of this study was to investigate the effects of the cryogenic treatment (CT) using liquid nitrogen on tensile properties and microstructures of the 2024-T351 aluminum alloy. Tensile tests were carried out, and tensile fractures were observed using a scanning electron microscope (SEM). The microstructure evolution of 2024-T351 subjected to CT was also studied using both an optic microscope ... hiện toàn bộ
Ultrasonic and Conventional Fatigue Endurance of Aeronautical Aluminum Alloy 7075-T6, with Artificial and Induced Pre-Corrosion
Metals - Tập 10 Số 8 - Trang 1033
Ishvari F. Zuñiga Tello, Marijana Milković, Gonzalo M. Domínguez Almaraz, Nenad Gubeljak
Ultrasonic and conventional fatigue tests were carried out on the AISI-SAE AA7075-T6 aluminum alloy, in order to evaluate the effect of artificial and induced pre-corrosion. Artificial pre-corrosion was obtained by two hemispherical pitting holes of 500-μm diameter at the specimen neck section, machined following the longitudinal or transverse direction of the testing specimen. Induced pre-corrosi... hiện toàn bộ
The Influence of Pre- and Post-Heat Treatment on Mechanical Properties and Microstructures in Friction Stir Welding of Dissimilar Age-Hardenable Aluminum Alloys
Metals - Tập 9 Số 11 - Trang 1162
Jia Yang, Sicong Lin, Jizi Liu, Yonggui Qin, Kehong Wang
An Al-Mg-Si alloy 6061 and an Al-Zn-Mg alloy 7A52 were joined by friction stir welding successfully. Pre- and post- heat treatment were employed to improve the strength of the weld. The results show a best weld joint with the lowest hardness of 100 HV in 6061 matrix, being achieved by post-solid-solution and subsequent two-stage artificial aging for the whole weld joint of the 7A52 and 6061 solid ... hiện toàn bộ
Effect of Milling Time and the Consolidation Process on the Properties of Al Matrix Composites Reinforced with Fe-Based Glassy Particles
Metals - Tập 5 Số 2 - Trang 669-685
Özge Balcı, K.G. Prashanth, S. Scudino, Duygu Ağaoğulları, İsmail Duman, M. Lütfi Öveçoğlu, Volker Uhlenwinkel, J. Eckert
Al matrix composites reinforced with 40 vol% Fe50.1Co35.1Nb7.7B4.3Si2.8 glassy particles have been produced by powder metallurgy, and their microstructure and mechanical properties have been investigated in detail. Different processing routes (hot pressing and hot extrusion) are used in order to consolidate the composite powders. The homogeneous distribution of the glassy reinforcement in the Al m... hiện toàn bộ
Processing and Properties of Aluminum and Magnesium Based Composites Containing Amorphous Reinforcement: A Review
Metals - Tập 5 Số 2 - Trang 743-762
S. Jayalakshmi, Sankaranarayanan Seetharaman, Manoj Gupta
This review deals with the processing and properties of novel lightweight metal matrix composites. Conventionally, hard and strong ceramic particles are used as reinforcement to fabricate metal matrix composites (MMCs). However, the poor mechanical properties associated with the interfacial de-cohesion and undesirable reactions at (ceramic) particle–(metallic) matrix interface represent major draw... hiện toàn bộ
Structure and Formation Model of Ag/TiO2 and Au/TiO2 Nanoparticles Synthesized through Ultrasonic Spray Pyrolysis
Metals - Tập 7 Số 10 - Trang 389
Gözde Alkan, Rebeka Rudolf, Jelena Bogović, Darja Jenko, Bernd Friedrich
This article explains the mechanism of the metal/oxide core-shell Ag/TiO2 and Au/TiO2 nanoparticle formation via one-step ultrasonic spray pyrolysis (USP) by establishing a new model. The general knowledge on the standard “droplet-to-particle” (DTP) mechanism, nucleation, and growth processes of noble metals, as well as physical and chemical properties of core and shell materials and experimental ... hiện toàn bộ
Influence of Batch Mass on Formation of NiTi Shape Memory Alloy Produced by High-Energy Ball Milling
Metals - Tập 11 Số 12 - Trang 1908
Tomasz Goryczka, Piotr Salwa
A high-energy ball milling technique was used for production of the equiatomic NiTi alloy. The grinding batch was prepared in two quantities of 10 and 20 g. The alloy was produced using various grinding times. Scanning electron microscopy, X-ray diffraction, hardness measurement and differential scanning calorimetry were used for materials characterization at various milling stages. The produced a... hiện toàn bộ
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