Article
Materials Science, Ceramics
Defeng Song, Linfang Qian, Jili Wu
Summary: This study investigates the room-temperature nanoindentation creep behaviors of as-cast and aged CuZrTiNb bulk metallic glasses, showing that ageing influences the hardness, creep displacement, and resistance to localized plastic deformation of the materials. Ageing decreases the resistance to localized plastic deformation but increases the creep resistance of current bulk metallic glass. The quantity of large holes decreases while that of small voids increases with ageing, as revealed by compliance and retardation spectra analysis.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Nanoscience & Nanotechnology
Silvia Pomes, Nozomu Adachi, Masato Wakeda, Takahito Ohmura
Summary: This study found a precursor phenomenon to incipient plasticity before the first serration in Zr50Cu40Al10 at% bulk metallic glass via nanoindentation testing.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Mechanical
K. Tao, F. C. Li, Y. H. Liu, E. Pineda, K. K. Song, J. C. Qiao
Summary: Understanding the microstructural heterogeneity of metallic glasses is crucial for understanding their physical and mechanical properties. Through structural relaxation and cold rolling, the state of metallic glasses can be modified, thereby altering their microstructural heterogeneity. The study shows that enhancing microstructural heterogeneity plays a significant role in tailoring the mechanical behavior of metallic glasses.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Ceramics
Abhilash Gunti, Jayanta Das
Summary: A series of instrumented nanoindentation tests were conducted on Zr52.5Cu18Ni14.5Al10Ti5 and Zr58.5Cu15.6Ni12.8Al10.3Nb2.8 as-cast and cold rolled samples to investigate the indentation size effect in three perpendicular planes. The results showed that the hardness, reduced modulus, and dynamic hardness decreased with increasing indentation depth in the rolling-width, normal-rolling, and normal-width planes. The size effect was analyzed using various models, indicating that dynamic mechanical softening and friction between the indenter and specimen were the underlying reasons for the observed indentation size effect.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Priyanka Saini, R. Lakshmi Narayan
Summary: The variations in local yield strength and plasticity of a Zr-based bulk metallic glass at different fictive temperatures were studied using nanoindentation and microindentation. The results showed an increase in incipient plastic events and subsequent pop-ins with increasing fictive temperature. Statistical analysis of strength scatter was used to determine the activation parameters for shear transformation zones (STZs) in all specimens. The increase in shear yield strength and plasticity with increasing fictive temperature was explained by considering the linear accumulation of STZs to form a shear band.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Shristy Jha, Saideep Muskeri, Siva Shankar Alla, Sundeep Mukherjee
Summary: Bulk Metallic Glasses (BMGs) have limited bulk plasticity due to shear localization. The effect of structural state and stress state on the micro-scale deformation behavior of BMGs is not well understood. In this study, a model Ni-based BMG was investigated under multiaxial nano-indentation, uniaxial micro-pillar compression, and micro-cantilever beam bending. The relaxed BMG showed increased hardness, yield strength, and bending strength compared to its as-cast counterpart. Both the as-cast and relaxed samples exhibited stable notch opening and blunting during micro-cantilever bending tests, but notch weakening was observed for both structural states. This research may stimulate further investigations into the deformation behavior of BMGs in real-world structural applications at small scale.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Instruments & Instrumentation
Fabien Volpi, Morgan Rusinowicz, Solene Comby-Dassonneville, Guillaume Parry, Chaymaa Boujrouf, Muriel Braccini, Didier Pellerin, Marc Verdier
Summary: This paper presents an investigation into resistive-nanoindentation tests on gold samples through experimental, analytical, and numerical studies. It explores the changes in contact resistance during nanoindentation and the evolution of electronic transport regimes. The developed numerical framework provides insights into technique capabilities and validates assumptions on current line distribution, highlighting the strength of resistive-nanoindentation for continuous area monitoring.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Chemistry, Multidisciplinary
Abhilash Gunti, Parijat Pallab Jana, Min-Ha Lee, Jayanta Das
Summary: The study showed that the cold rolling percentage significantly affected the hardness at the specimen surface, while the variation was minimal in the core region of the specimen on the normal-rolling and normal-width planes. Three-dimensional optical surface profilometry studies revealed that the shear band spacing decreased and shear band offset height increased with the increase of cold rolling extent on the normal-rolling plane.
Article
Chemistry, Multidisciplinary
Georgy Fedorov, Roohollah Hafizi, Vyacheslav Semenenko, Vasili Perebeinos
Summary: In this study, the effect of metal deformations on the gate voltage dependence of the conductance of metallic armchair and zigzag carbon nanotube field effect transistors (FETs) was investigated. It was found that the current-voltage characteristics of these FET devices are different from those expected for metallic carbon nanotubes. The gate-voltage dependence of the conductance in armchair CNTFETs shows an ON/OFF ratio of about a factor of two, nearly independent of temperature, attributed to deformation-induced modification of the band structure.
Article
Chemistry, Physical
Haoyu Jin, Huie Hu, Junhan Chi, Yunfei Ma, Xiaohong Su
Summary: This study investigated the interfacial characteristics of tungsten-particle-reinforced Zr-based bulk-metallic-glass composites (Wp/Zr-BMGs) with varying tungsten-particle sizes. The results showed that the interfaces of Wp/Zr-BMGs exhibited dissolution-diffusion characteristics, and the thickness of the interface diffusion layer was positively correlated to the size of Wp. The addition of Wp enhanced the elastic modulus and hardness of Zr-BMGs at the interface.
Article
Materials Science, Multidisciplinary
Saade Abdalkareem Jasim, Muneam Hussein Ali, Zaid Hameed Mahmood, Mohammad Rudiansyah, Forat H. Alsultany, Yasser Fakri Mustafa, Montather F. Ramadan, Aravindhan Surendar
Summary: This paper investigates the influence of alloying composition on the nanomechanical properties of metallic glasses (MGs) through molecular dynamics simulation. The results show that the yielding event is enhanced with increasing Cu content, but there exists an optimal composition for maximizing the hardening effect. In Cu-rich MGs, pile-ups and dominant shear bands are formed, while in Zr-rich MGs, a net-like shear arrangement is observed under the indented site. Furthermore, the rate of change in polyhedron types during the indenting process strongly depends on the alloying compositions.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Soowan Park, Joao Henrique Fonseca, Karuppasamy Pandian Marimuthu, Chanyoung Jeong, Sihyung Lee, Hyungyil Lee
Summary: In this study, an artificial neural network is combined with finite element nanoindentation to evaluate free volume model parameters for bulk metallic glass. A material database is generated based on finite element analysis, and an artificial neural network is trained to correlate the free volume model and indentation parameters. The feasibility of this approach is experimentally validated.
Article
Chemistry, Physical
Michael K. Steinhoff, Damian M. Holzapfel, Soheil Karimi Aghda, Deborah Neuss, Peter J. Poellmann, Marcus Hans, Daniel Primetzhofer, Jochen M. Schneider, Clio Azina
Summary: Ag-containing ZrCuAlNi thin film metallic glass (nano)composites were prepared using a hybrid sputtering process, and the effects of Ag content, substrate temperature, and substrate bias potential on the phase formation and morphology of the composites were investigated.
Article
Chemistry, Physical
Ning Luo, Florian Galgon, Sebastian Krauss, Luis A. Morales, Benoit Merle, Christopher H. Zenk, Carolin Koerner
Summary: In this study, Zr59.3Cu28.8Al10.4Nb1.5 bulk metallic glass composites were prepared using laser metal deposition technology, and the phase constitutions, thermal behavior, and microstructure evolution were examined. The correlation between microstructure and mechanical properties of the samples was investigated, enhancing our understanding of BMGCs fabricated in-situ by DED additive manufacturing.
Article
Materials Science, Ceramics
Ming Liu, Dongyang Hou, Chenghui Gao
Summary: Berkovich nanoindentation experiments were conducted on Zr55Cu30Al10Ni5 bulk metallic glass, revealing the relationships between indentation variables and properties such as hardness and elastic modulus. A new methodology for determining fracture toughness based on total work of indentation was proposed.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Sharmin Sultana, Malik Abdul Rub, Marzia Rahman, Shahed Rana, Mohammad Majibur Rahman, Md Anamul Hoque, Yousef G. Alghamdi, Abdullah M. Asiri
Summary: In this study, the aggregation behaviors of PVA and TTAB in alcohols/diols media were investigated using conductivity measurements. The physico-chemical parameters and thermodynamic properties were determined. The results showed that the CMC values varied in different solvents, indicating the significant influence of solvents on the micelle formation of TTAB + PVA mixture. It was also found that PVA molecules interacted exclusively with TTAB through hydrogen bonding, ion-dipole, and hydrophobic interactions.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Md. Anamul Hoque, Shamim Mahbub, Md. Tuhinur R. Joy, Malik Abdul Rub, Shahed Rana, Dileep Kumar, Yousef G. Alghamdi, Abdullah M. Asiri, Mohammed Abdullah Khan
Summary: The micellization behavior of CTAB and BSA mixture in different diols media was studied. The critical micelle concentration (cmc) values of the mixture decreased with increasing temperature and followed the order: cmc(1,5-PD)>cmc(1,2-PrD)>cmc(2,3-BD). The degree of micelle ionization (a) increased with carbon chain length and temperature. The thermodynamic parameters and the contribution of the solvent were also evaluated.
CHEMICAL ENGINEERING COMMUNICATIONS
(2023)
Article
Chemistry, Organic
Mohammad Asad, Muhammad Nadeem Arshad, Abdullah M. Asiri, Mohammed T. N. Musthafa, Salman A. Khan, Mohd Rehan, Mohammad Oves
Summary: A series of novel N-methylspiropyrrolidine hybrids were synthesized using 1,3-dipolar cycloaddition reaction, and their structures, antibacterial activity, and mechanism of action were investigated.
POLYCYCLIC AROMATIC COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
K. S. N. Satish Idury, R. Lakshmi Narayan
Summary: Additive manufacturing techniques have the potential to produce large-size bulk metallic glass components, but the presence of oxygen during fabrication can affect their glass forming ability and mechanical properties. This review explores the issue of oxygen pick-up in BMGs during AM fabrication and discusses its impact on crystal nuclei formation, glass forming ability, and mechanical properties.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Materials Science, Multidisciplinary
Tingyi Yan, Long Zhang, R. Lakshmi Narayan, Jingyu Pang, Yi Wu, Huameng Fu, Hong Li, Upadrasta Ramamurty, Haifeng Zhang
Summary: This study investigates the influence of different microstructures and cryogenic cyclic treatment (CCT) on the impact toughness of bulk metallic glass composites (BMGCs). It is found that at 298 K, the intrinsic toughness of the glass matrix and deformation-induced martensitic transformation (DIMT) are the key mechanisms, while at 77 K, the toughness is primarily determined by the glass matrix itself. The addition of Al affects the phase stability and impact toughness of BMGCs at 298 K, but it causes embrittlement at 77 K. CCT can rejuvenate the BMGCs and enhance the impact toughness at 298 K, but it decreases the toughness at 77 K with increasing CCT cycles.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Metallurgy & Metallurgical Engineering
S. Pradeep Kumar, V Chakkravarthy, A. Mahalingam, R. Rajeshshyam, N. Sriraman, P. Marimuthu, R. Lakshmi Narayan, P. Dinesh Babu
Summary: The main limitation of selective laser melting (SLM)-based additive manufacturing is the smaller build size and the lack of standard rework techniques. This study explores the weldability of SLM-built stainless steel samples and evaluates the quality of the weld. The results show that laser-welded SLM samples exhibit superior tensile strength and hardness, providing a novel solution for reworking defective SLM components.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Nanoscience & Nanotechnology
Yaojie Wen, Jianbao Gao, Ramasubramanian Lakshmi Narayan, Pei Wang, Lijun Zhang, Baicheng Zhang, Upadrasta Ramamurty, Xuanhui Qu
Summary: The microstructures and mechanical properties of a laser powder bed fusion manufactured compositionally graded alloy of SS316L and Inconel 718 were studied. Heat treatment caused changes in the microstructure and mechanical properties of the alloy, including coarsening of Laves phases and precipitation of gamma and gamma' phases. The alloy exhibited increased hardness, yield strength, and tensile strength but decreased ductility after heat treatment.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Polymer Science
Aftab Aslam Parwaz Khan, Mallikarjunagouda B. Patil, Laxmibai P. Rathod, Shivalila G. Vader, Pankaj Raizada, Pardeep Singh, Maha M. Alotaibi, Mohammad Omaish Ansari, Anish Khan, Naved Azum, Malik Abdul Rub, Muhammad Nadeem Arshad, Abdullah M. Asiri
Summary: The study assessed the potential of nanocomposite membranes (NCMs) made of sodium alginate and embedded with synthesized zeolitic imidazole framework-8 (ZIF-8) as fillers for separating gaseous mixtures generated by methane reforming. ZIF-8 crystals were synthesized through hydrothermal synthesis, with sizes ranging from 50 to 70 nm. NCMs with 15% filler loading (synthesized ZIF-8) outperformed neat polymer membranes in terms of H-2 permeability and selectivity, achieving a purity of up to 95%. However, NCMs did not perform better than neat polymer membranes in separating gas mixtures. The combination of ZIF-8 and sodium alginate as fillers is a new and worth investigating.
Article
Polymer Science
Esraa M. Bakhsh, Sher Bahadar Khan, Nujud Maslamani, Ekram Y. Danish, Kalsoom Akhtar, Abdullah M. Asiri
Summary: In this study, CMC/CuO-TiO2 beads were developed as a catalyst for the reduction of organic and inorganic contaminants. These beads demonstrated excellent catalytic activity and stability.
Article
Polymer Science
Muhammad Tariq Saeed Chani, Khasan S. Karimov, Tahseen Kamal, Noshin Fatima, Mohammed M. Rahman, Abdullah M. Asiri
Summary: Polymeric rubber and organic semiconductor H2Pc-CNT composite-based shockproof deformable infrared radiation (IR) sensors were fabricated using a rubbing-in technique. The sensors showed decreased resistance and impedance when exposed to IR irradiation, and the temperature coefficients of resistance (TCR) were 1.2 and 1.1 for the surface-type and sandwich-type sensors, respectively. The high TCR value and novel composition of the H2Pc-CNT composite make these devices attractive for bolometric applications, and their easy fabrication and low-cost materials make them commercially viable.
Article
Chemistry, Physical
Tahir Ali Sheikh, Abdullah M. Asiri, Amna Siddique, Hadi M. Marwani, Md. Rezaur Rahman, Muhammad Nadeem Akhtar, Mohammed M. Rahman
Summary: A novel electrochemical current-potential (I-V) approach was developed using a highly calcined binary metal oxide (Er2O3@NiO) semiconductor nanocomposite to detect and degrade toxic chemicals in aqueous medium. The modified glassy carbon electrode based on this semiconductor nanocomposite showed selectivity towards m-tolyl hydrazine (m-Tolyl HDZN) and good affinity towards other interfering toxic chemicals. Analytical parameters were optimized and the limit of detection (LOD) for m-Tolyl HDZN was calculated.
Article
Materials Science, Multidisciplinary
H. Mohit, Sanjay Mavinkere Rangappa, Krittirash Yorseng, Suchart Siengchin, Hadi M. Marwani, Anish Khan, Abdullah M. Asiri
Summary: The effect of chemically treated and untreated water hyacinth/pineapple leaf, titanium carbide nanoparticles, Innegra, and carbon fabric reinforcement on the characteristics of polyester hybrid composites was studied. The chemically treated fibers showed excellent bonding with the fillers and textiles, as observed from various analysis techniques. The use of artificial neural network (ANN) for modeling the material characteristics was also investigated in this study.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Mohammad Asad, Muhammad Nadeem Arshad, Abdullah M. Asiri, Hadi M. Marwani, Khalid A. Alamry, Mohammad Mahboob Alam, Syed Nazreen, Ahmed A. Elhenawy, Mohammed M. Rahman
Summary: N-Acylated-2-pyrazolines (NA2Pyr) were synthesized using chalcone and hydrazine hydrate, and their structures were determined. A metal ion sensor for lead (Pb2+) was developed by combining a conducting coating binder (PEDOT:PSS) with a NA2Pyr modified electrode (NA2Pyr/GCE). The sensor exhibited high sensitivity and a wide linear dynamic range.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Biochemistry & Molecular Biology
Zunera Khalid, Syed Salman Shafqat, Hafiz Adnan Ahmad, Munawar Ali Munawar, Sadaf Mutahir, Safaa M. Elkholi, Syed Rizwan Shafqat, Rahila Huma, Abdullah Mohammed Asiri
Summary: Diabetes is a chronic metabolic disorder characterized by high blood sugar levels due to insulin deficiency or ineffective use. Alpha-glucosidase inhibitors are commonly used to control hyperglycemia, but can cause side effects. This study synthesized and tested a new series of compounds for their alpha-glucosidase inhibition potential. The compounds 14k and 14l showed strong inhibitory activity and in silico studies confirmed their interactions with the enzyme. This research provides potential candidates for the development of new antidiabetic drugs.
Article
Physics, Applied
Aftab Aslam Parwaz Khan, Z. Fadil, Pankaj Raizada, Pardeep Singh, Maha Alotaibi, Mohammad Omaish Ansari, Anish Khan, Abdullah M. Asiri, Chaitany Jayprakash Raorane
Summary: A monolayer anthracene-like nanostructure was studied through Monte Carlo simulations to determine its compensation temperature and magnetic hysteresis cycle. The effects of exchange coupling on compensation and transition temperatures were discussed. The study also investigated the magnetic hysteresis cycles and surface of multi-loop hysteresis with respect to strong exchange coupling and temperature parameters. This research has significant implications for multi-state memories and nanotechnology.
