Article
Materials Science, Multidisciplinary
M. Prashanth, R. Karunanithi, S. Rasool Mohideen, S. Sivasankaran
Summary: This study examines the microstructural observation and mechanical behavior of nanocrystallite Al 7017 alloy prepared by Mechanical Alloying for different milling times. The results show the formation of nanocrystallite Al 7017 alloy through MA, with changes in particle morphology observed. The influence of milling time on the mechanical properties of hot-pressed Al 7017 alloys is significant.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
M. Prashanth, R. Karunanithi, S. Sivasankaran, Luis Perez Villarejo
Summary: This study investigates the influence of the volume percentage of Al2O3 and milling time on the morphology, phase formation, and mechanical behavior of nanocomposites. The results show that the nanocomposite samples reinforced with 10 vol% Al2O3 exhibit higher hardness and compressive stress compared to those reinforced with 5 vol% Al2O3 and 20 vol% Al2O3. Additionally, the contribution of the strengthening mechanism to the total strength of the specimen was studied for different milling times of the 10 vol% Al2O3 reinforcement.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
M. Prashanth, R. Karunanithi, S. Rasool Mohideen, S. Sivasankaran
Summary: In this study, several nanocomposites were fabricated using mechanical alloying and hot pressing, and the effects of oxide addition on their structure and mechanical properties were investigated. The results showed that the hybrid nanocomposite exhibited higher hardness and compressive strength, along with the formation of specific precipitates.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Yongdong Yu, Jiayu Pan, Yuchen Yuan, Xudong Liu, Wanjun Yu, Hang Yin, Yongting Zheng, Xiaodong He
Summary: In this study, AZY-TCC with different Y2O3 contents were successfully prepared, and their properties were tested and analyzed. The results showed that the solidification morphology of AZY-TCC changed with increasing Y2O3 content, and the coatings exhibited excellent mechanical and anti-oxidative characteristics.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Youyou Zhang, Huibin Wu, Xinpan Yu, Di Tang, Rui Yuan, Hui Sun
Summary: In this study, the microstructure and mechanical properties of CrxMnFeNi high-entropy alloy were investigated. It was found that a dual-phase FCC/BCC structure was formed when the Cr content exceeded a threshold value. The presence of BCC phase in the dual-phase alloy significantly increased strength but decreased ductility, showing a good strength-ductility matching mechanism.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
Wei -Kai Wang, Yu-Hao Chang, Chih-Feng Jung, Shih-Yung Huang, Pi-Chuen Tsai
Summary: The study investigated the effect of Y2O3: MgO ratio on the microstructures, mechanical properties, and plasma erosion behaviors of Y2O3-MgO (YM) nanocomposite films. Increasing the MgO content disrupted the columnar growth structure of the YM nanocomposite film and refined the Y2O3 grains. A Y2O3: MgO ratio of 40:60 effectively refined the columnar crystal structure of the YM nanocomposite film due to thermodynamic incompatibility. As a result, the YM nanocomposite film exhibited significantly improved strength, with a maximum hardness of 16.78 +/- 0.8 GPa and elastic modulus of 149.24 +/- 4.7 GPa. X-ray photoelectron spectroscopy confirmed the chemical stability of the YM nanocomposite samples even after fluorination. The YM nanocomposite film showed a lower etching depth compared to the commercial Y2O3 film, indicating enhanced erosion resistance.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
M. R. Akbarpour, F. Gharibi Asl, H. Mousa Mirabad, H. S. Kim
Summary: This study successfully fabricated Cu-SiC nanocomposites using flake powder metallurgy and high-pressure torsion processing techniques. The addition of nano-sized SiC powders improved the mechanical properties and wear resistance of Cu.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Multidisciplinary Sciences
Pradipta Kumar Jena, Koppoju Suresh, K. Sivakumar, R. K. Mandal, A. K. Singh
Summary: This study investigates the effect of aging on microstructure, texture, mechanical, and ballistic properties of AA-7017 aluminium alloy. The alloy undergoes three different aging treatments: under-aging, peak-aging, and over-aging. Aging significantly affects the mechanical properties, with the peak-aged condition displaying the highest strength and hardness. Texture measurements show an increase in the overall intensity of orientation distribution function from under-aged to peak-aged condition. The ballistic resistance of AA-7017 alloy is best in the peak-aged condition, and post ballistic microstructure analysis reveals distorted material flow lines and adiabatic shear band induced cracking.
DEFENCE SCIENCE JOURNAL
(2023)
Article
Chemistry, Physical
Nina Obradovic, William G. Fahrenholtz, Cole Corlett, Suzana Filipovic, Marko Nikolic, Bojan A. Marinkovic, Simone Failla, Diletta Sciti, Daniele Di Rosa, Elisa Sani
Summary: Mechanical activation was used to prepare MgAl2O4, with the addition of yttrium oxide and graphene to prevent abnormal grain growth during sintering. The study found that the sintered specimens achieved 100% purity, with a decrease in crystallite size with the addition of yttria or graphene.
Article
Materials Science, Composites
Chenwei Shao, Calvin Lo, Kapil Bhagavathula, Andre McDonald, James Hogan
Summary: The aluminum-alumina composites were designed with ultrahigh strength through dispersion strengthening and matrix strengthening, and fabricated using cold spraying additive manufacturing technology. Experimental evaluation showed a change in compressive failure mode from gradual plastic collapse to shear-dominated behavior as the percentage of Al2O3 increased or the matrix was pre-strain strengthened within the Al-Al2O3 composite.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Yu Zhang, Xianzhe Shi, Zhiqin Du, Yahui Yang, Xiaochuan Liu, Yulong Li, Jianghua Shen
Summary: Laser ablation of titanium alloys leads to microstructure evolution and changes in mechanical properties. In addition to the ablation area, a heat-affected zone with significant changes in microstructure and mechanical characteristics exists. Needle-like alpha, refinement grains, and high oxygen content contribute to increased microhardness, while excessive oxygen content and severe solute element segregation may result in indentation cracks. These findings provide insights for the design of defensive Ti alloys and the application of laser repair techniques.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Zixuan Wu, Xiaosong Jiang, Yanjun Li, Pal Christian, Hongliang Sun, Yali Zhang, Yongjian Fang, Rui Shu
Summary: In this study, graphene nanoplatelets (GNPs) reinforced Cu/Ti3SiC2/C nanocomposites were successfully prepared by high-pressure torsion (HPT) after powder metallurgy. The study systematically analyzed the microstructures, interfacial bonding, mechanical, and electrical properties of the nanocomposites. The results showed that HPT significantly improved the dispersion of GNPs, the clarity and bonding of interfaces between the matrix and reinforcing phases. The grain size of the nanocomposites was considerably refined. The study also found that with the increase of HPT turns, the relative density, mechanical, and electrical properties of the nanocomposites were all improved.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Multidisciplinary
Puzhen Shao, Kai Sun, Ping Zhu, Kai Liu, Qiang Zhang, Wenshu Yang, Zhijun Wang, Ming Sun, Dingyue Zhang, Sergey Kidalov, Haiying Xiao, Gaohui Wu
Summary: The present work investigates the properties of graphene-nanoplates/aluminum composites with a heterogeneous matrix design, and demonstrates that this design improves the mechanical properties, plasticity, and strengthening effect of the material.
Article
Materials Science, Multidisciplinary
K. Raja Rao, Sudip K. Sinha
Summary: Y2O3-reinforced AlCoCrFeNi high entropy alloys were successfully synthesized using mechanical alloying and spark plasma sintering. The addition of yttria particles restricted the grain growth of the alloy and improved its hardness and yield strength. The alloys exhibited a microstructure with uniform distribution of Al4FeO12Y3 particles.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yingbo Bai, Rui Zhang, Yang Qi, Chuanyong Cui, Yahui Cai
Summary: The study demonstrated that ball milling enhances the sintering activity of Ni-Co based superalloy powders, while a master alloy with low C content leads to a more uniform microstructure. After solution treatment, the Y2O3 network reinforced alloy showed improved hardness and better overall properties.
