Article
Materials Science, Multidisciplinary
Kuo-Min Hsu, Sz-Han Chen, Chao-Sung Lin
Summary: The effect of Mn on the passivation behavior of FeCrNiCoMn high entropy alloy was investigated through anodic polarization experiments, revealing that a decrease in Mn content can enhance the corrosion resistance of the alloy by increasing the Cr2O3 content in the passive film. However, the competitive oxidation of Mn with Cr can lead to a reduction in Cr2O3 content and deteriorate the corrosion resistance of the alloy.
Article
Nanoscience & Nanotechnology
S. H. Chen, J. S. Zhang, S. Guan, T. Li, J. Q. Liu, F. F. Wu, Y. C. Wu
Summary: This study prepared WNbMoTaZrx (x = 0.1, 0.3, 0.5, 1.0) refractory high entropy alloys (RHEAs) and characterized their microstructure, hardness, compressive properties, and fracture behavior. The results showed that increasing Zr content improved the mechanical properties of the RHEAs, primarily due to solid solution strengthening, formation of interdendritic regions, and refinement of dendrite structures. The deformation mechanisms and fracture modes of RHEAs with higher compressive plasticity were examined and discussed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Jun-Hwe Cha, Su-Ho Cho, Dong-Ha Kim, Dogyeong Jeon, Seohak Park, Ji-Won Jung, Il-Doo Kim, Sung-Yool Choi
Summary: High-entropy alloys (HEAs) have unique physicochemical properties compared to unary nanoparticles (NPs). Conventional alloying guidelines limit the possible combinations of alloying elements, but recent research has shown that carbon thermal shocks (CTS) and a high-entropy environment play a critical role in HEA synthesis. This study proposes a photo-thermal approach using carbon nanofibers to successfully synthesize HEA NPs with up to nine elements, demonstrating high activity and stability in water splitting reactions.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Anirudha Karati, Sanyukta Ghosh, M. Nagini, Ramesh Chandra Mallik, Rajashekhara Shabadi, B. S. Murty, U. V. Varadaraju
Summary: In this study, nanocrystalline Ti2NiCoSn1-xSb1+x(x = 0.3, 0.5, 0.7, 1) alloys were successfully synthesized using the powder metallurgy route. The homogeneous distribution of elements in the half-Heusler phase at a scale of few nanometers was confirmed by atom probe analysis. A combination of nanostructuring, lattice distortion, and interfacial scattering resulted in a reduction in thermal conductivity and an improvement in thermoelectric efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Lou Li-Yan, Chen Shu-nan, Liu Yi, Ji Gang, Chen Hai-Dong, Jia Yun-Jie, Li Chang-Jiu, Li Cheng-Xin
Summary: A novel lightweight refractory high entropy alloys AlxCrNbTiV have been prepared by vacuum arc melting. The alloys exhibit a BCC phase with significant dendrite structure and a low density. The addition of Al enhances the hardness of the alloys. Al0.2CrNbTiV alloy shows a good combination of strength and ductility at room temperature, while Al0.5CrNbTiV and Al0.8CrNbTiV alloys exhibit typical brittle behavior. The hot compression process activates both DDRX and CDRX, resulting in softening and increased ductility of the alloys. The theoretical yield stress of AlxCrNbTiV is calculated, indicating that the degree of solid solution affects the accuracy of estimation.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Chemistry, Physical
Anil Kumar, Rituraj Chandrakar, Saurabh Chandraker, K. Raja Rao, Manoj Chopkar
Summary: The addition of Si element can enhance the hardness and wear resistance of AlCoCrCuFeNi alloys, mainly attributed to the development of BCC and sigma phases, as well as solid solution strengthening.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Mariana de Brito Ferraz, Walter Jose Botta, Guilherme Zepon
Summary: In this study, a novel Mg-containing high entropy alloy was synthesized and characterized. The alloy composition was designed to increase its hydrogen storage capacity by increasing the atomic fraction of lightweight elements and improving hydrogen affinity. Different synthesis routes resulted in different phases formed during hydrogen absorption/desorption.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Wojciech Lonski, Monika Spilka, Mariola Kadziolka-Gawel, Piotr Gebara, Adrian Radon, Tymon Warski, Katarzyna Mlynarek-Zak, Rafal Babilas
Summary: High entropy alloys with variable silicon content were prepared by two different methods to investigate the influence of cooling rate and chemical composition on their structure and properties. The results showed that increasing silicon content led to a decrease in saturation magnetization, and rapidly cooled plates exhibited the lowest coercive force. The AlCoCrFeNiSi0.75 alloy in plate form exhibited the highest corrosion resistance in a 3.5% NaCl solution, and the addition of Si increased the hardness of the ingots and plates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Meng Sun, Xueqing Liu, Weibin Jiang, Yawei Lei, Jiangang Ke, Rui Liu, Xianping Wang, Xuebang Wu, Qianfeng Fang, Changsong Liu
Summary: The defect relaxation behavior of AlCrTiVx high entropy alloys was investigated, revealing that the activation energy of grain boundary relaxation increases with higher V content, indicating greater complexity and difficulty of atomic diffusion. After annealing, an abnormal increase in the high-temperature background of AlCrTiV alloy was observed, attributed to the appearance of misfit dislocations induced by the precipitation of Ti-rich phases.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Gaurav Potnis, Debottam Goswami, Jayanta Das
Summary: Twin mediated plasticity in high entropy CoCr1.3FeNi0.7MnNbx ultrafine lamellar eutectic is reported by tuning stacking fault energy. The phases in the eutectic microstructure are identified as FCC phase and HCP-Fe2Nb-type Laves phase. The investigation shows the concurrent effect of dislocation-slip and twinning deformation, resulting in high strain hardening, high strength, and compressive plasticity.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Kh. Nazaretyan, S. Aydinyan, H. Kirakosyan, D. Moskovskikh, A. Nepapushev, K. Kuskov, M. Tumanyan, A. Zargaryan, R. Traksmaa, S. Kharatyan
Summary: In this study, novel AlCo-rich AlCoNiFe and AlCoNiFeCr high entropy alloys were successfully prepared and their formation range was predicted by thermodynamic modeling. The factors influencing their formation mechanism and thermal stability were investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yuhong Yao, Yaohua Jin, Wei Gao, Xiaoyu Liang, Jian Chen, Shidong Zhu
Summary: The study showed that adding 0.1 mol of Zr greatly improved the corrosion resistance of AlCoCrFeNiZrx high-entropy alloys, with Zr0.1 alloy exhibiting the best corrosion resistance. As the Zr content increases, the corrosion resistance of the alloy first increases and then decreases.
Article
Materials Science, Multidisciplinary
Shiyu Wu, Dongxu Qiao, Haitao Zhang, Junwei Miao, Hongliang Zhao, Jun Wang, Yiping Lu, Tongmin Wang, Tingju Li
Summary: The microstructure and mechanical properties of refractory high-entropy alloys (RHEAs) were studied, showing excellent performance at high temperatures with yield strength surpassing currently known alloys. These RHEAs exhibited high-temperature performance stability and excellent plasticity.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Olga Samoilova, Svetlana Pratskova, Nataliya Shaburova, Ahmad Ostovari Moghaddam, Evgeny Trofimov
Summary: The electrochemical behavior of as-cast Al0.5CoCrFeNiCuxAgy (x = 0.25, 0.5; y = 0, 0.1) high-entropy alloys in a 0.5M H2SO4 solution was investigated. Copper segregation along the grain boundaries was observed in Al0.5CoCrFeNiCu0.5 and Al0.5CoCrFeNiCu0.5Ag0.1, leading to low corrosion resistance. The introduction of Ag into Al0.5CoCrFeNiCu0.25 resulted in the precipitation of a copper-silver eutectic structure, which enhanced the corrosion resistance of the alloy.
Article
Materials Science, Ceramics
Gurudeo Nirala, Dharmendra Yadav, Tarun Katheriya, Shail Upadhyay
Summary: Several compositions of Sr2Mn1-xSnxO4 system were synthesized using solid-state ceramic method in air. A change in the sign of the permittivity above a specific temperature was observed at all frequencies, and it was found that this negative permittivity was caused by plasma oscillations of thermally excited free charge carriers. XPS analysis confirmed mixed-valence states of Mn (Mn4+ and Mn3+) and Sn (Sn4+ and Sn2+) ions, while UV-vis.-IR spectroscopy results indicated the generation of defect states in the forbidden bandgap region of Sr2MnO4 on Sn substitution at Mn site. These synthesized samples show promise as metamaterials for applications in the radio frequency (10 Hz-2 MHz) region due to their high-temperature plasmonic behavior.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Composites
Anoj Meena, Diksha Bisht, Ramkumar Yadav, Sonu Saini, Govind Sharan Dangayach, Amar Patnaik, Makkhan Lal Meena
Summary: Composite resin is increasingly utilized in cosmetic and restorative dentistry, with the addition of micro-alumina and zirconia particulates improving its physical and mechanical properties while reducing wear. The study found that normal load and filler content significantly affect the volumetric wear of dental composites, with AZDC6 showing the highest compressive strength. The research highlights the importance of optimizing these factors to enhance the performance of dental composite materials.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Multidisciplinary
Vishal Bhojak, Jayahari Lade, Jinesh Kumar Jain, Amar Patnaik, Kuldeep Kumar Saxena
Summary: This paper investigates the effect of annealing parameters on the mechanical properties and microstructure characteristics of low-carbon steel. Experimental results show that temperature is the most significant factor influencing both mechanical properties and microstructure characteristics.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
(2022)
Article
Materials Science, Textiles
Pankaj Agarwal, Mukesh Kumar, Mahavir Choudhary, Ankush Sharma, Amar Patnaik
Summary: This study demonstrates the effective utilization of industrial waste metal fiber to develop hybrid glass/metal fiber reinforced polymer composites for marine applications. The composites were fabricated using a vacuum assisted resin transfer molding technique under controlled conditions. The physical, mechanical, and thermomechanical properties, as well as water absorption, thermal conductivity, and thermo-gravimetric analysis of the composites were characterized. The study also included simulation analysis of mechanical properties and thermal conductivity, and investigation of composite defects using scanning electron microscopy.
FIBERS AND POLYMERS
(2022)
Article
Materials Science, Composites
Ramkumar Yadav, Anoj Meena, Amar Patnaik
Summary: The objective of this study was to examine the tribological behavior of micro-nano particulates filled dental restorative composite material. The study found that the specific-wear-rate decreased with the variation of load, while it increased with the variation of sliding velocity and time. The dental composite incorporated with 8 wt% nano-hydroxyapatite exhibited the minimum specific-wear-rate under specific conditions.
POLYMER COMPOSITES
(2022)
Review
Polymer Science
Ramkumar Yadav, Anoj Meena, Amar Patnaik
Summary: Biomaterials play a significant role in dental composite materials and implants, requiring evaluation of their physical, mechanical, wear, and biocompatibility properties. This review focuses on the essential features associated with the mechanical, biological, and microstructural properties of biomaterials used in dental composites or implants. It also explores the successful use of diverse materials and processing techniques to enhance the characteristics of dental materials or implants.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Tej Singh, Chandramani Goswami, Amar Patnaik, Laszlo Lendvai
Summary: Designing high-quality hip implant composite materials is challenging, and selecting the best material is difficult. Different ceramic compositions of composites were fabricated and evaluated based on various physical, mechanical, and wear properties. A hybrid AHP-MOORA approach was used to select the optimal composite alternative.
Article
Polymer Science
Tej Singh, Amar Patnaik, Lalit Ranakoti, Gabor Dogossy, Laszlo Lendvai
Summary: In this study, the effects of wood waste content on the thermal and dry sliding wear properties of PLA biocomposites were investigated. It was found that the inclusion of wood waste reduced the wear of the composites, with the wood waste content being the most crucial parameter affecting the wear of PLA biocomposites.
Article
Materials Science, Composites
Pankaj Agarwal, Mukesh Kumar, Ankush Sharma, Mahavir Choudhary, Deepika Shekhawat, Amar Patnaik
Summary: The development of hybrid polymer composites using industrial waste, replacing synthetic fiber, and investigating their erosion performance has gained global research interest. The study analyzed the erosion performance in an erosive environment by partial replacement of steel fiber with synthetic glass fiber. The experiment used different weight percentages of glass fiber and steel fiber and analyzed various parameters such as impact velocity, fiber loading, impingement angle, and slurry concentration. The experimental results were validated with theoretical models and numerical simulations using computational fluid dynamics. The study also employed Taguchi's experimental design analysis to evaluate the erosion rate of the hybrid composites.
POLYMER COMPOSITES
(2022)
Article
Engineering, Environmental
Laszlo Lendvai, Maria Omastova, Amar Patnaik, Gabor Dogossy, Tej Singh
Summary: This study explores the possibility of developing a new class of hybrid biocomposites using wood flour and rice husk as environmentally friendly additives to PLA. The results show that the addition of natural waste particles significantly improves the mechanical properties of the material but decreases its impact strength and tensile strength. Limited interfacial adhesion between the components is observed, and the particles act as nucleating agents, increasing the overall crystallinity of the material.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Materials Science, Multidisciplinary
D. Shekhawat, P. Agarwal, A. Singh, A. Patnaik
Summary: This study investigates the thermal and thermomechanical behavior of aluminium 6061 alloy reinforced with nano zirconia for medical applications. It is found that the thermal conductivity decreases and storage modulus increases with the increasing of nano zirconia particles reinforcement. The loss modulus increases with the increasing temperature. Furthermore, the decomposition temperature of the composites improves with the weight percentage of nano zirconia particles.
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK
(2022)
Article
Engineering, Mechanical
Shiv Ranjan Kumar, Amar Patnaik
Summary: This study evaluated the effects of mineral trioxide aggregate (MTA) on the chemical, mechanical, and wear properties of polymeric dental composites. The results showed that the addition of MTA reduced wear volume and increased micro-hardness of the dental composites. Therefore, using MTA as an alternative to expensive nanofillers in dental composites is recommended.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Pankaj Agarwal, Ankush Sharma, Mukesh Kumar, Tapan Kumar Patnaik, Amar Patnaik
Summary: This paper investigates the usefulness of industrial waste metal fiber as a reinforcement in hybrid glass/metal fiber epoxy composites. The experimental and finite element analysis results provide insights into the fracture toughness and stress intensity factor of the hybrid composites with different stacking sequences, which can be used for further research and application.
ENGINEERING RESEARCH EXPRESS
(2022)
Article
Chemistry, Physical
Sourabh Bhaskar, Mukesh Kumar, Amar Patnaik
Summary: In this study, hybrid AA2024 - Si3N4 - SiC - graphite alloy composites were fabricated using the stir casting method, and their physical, mechanical, thermal, thermo-mechanical, fracture toughness, and sliding wear properties were evaluated. The results showed that the density and material stability of the alloy composites improved with reinforcement content, while porosity and thermal conductivity decreased. The mechanical characteristics significantly improved with the addition of reinforcement, especially in the case of 6 wt.% Si3N4 particulate composite. The wear performance was also improved with higher Si3N4 particulate content, resulting in lower specific wear rate and friction coefficient.
Proceedings Paper
Engineering, Industrial
Alok Vats, Amar Patnaik, M. L. Meena, Dinesh Shringi
RECENT ADVANCES IN SMART MANUFACTURING AND MATERIALS, ICEM 2020
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
Sachin Tejyan, Divyesh Sharma, Brijesh Gangil, Amar Patnaik, Tej Singh
Summary: This study investigates the thermal conductivity and mechanical characterization of textile material reinforced polymer composites. Experimental and theoretical evaluations show that as the weight percentage of fabric increases, the mechanical properties of the composites improve while the thermal conductivity decreases.
MATERIALS TODAY-PROCEEDINGS
(2021)
