Article
Materials Science, Multidisciplinary
Abbas Mohammadi, Nariman A. Enikeev, Maxim Yu Murashkin, Makoto Arita, Kaveh Edalati
Summary: The study achieved nanograin sizes in an Al-La-Ce alloy through ultra-SPD followed by aging, and identified two breaks in the Hall-Petch relationship. Detailed analysis confirmed that nanograin formation alone is not sufficient for extra hardening, and additional strategies such as grain-boundary segregation and precipitation are necessary to address the issue of softening.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Quanfeng Han, Xin Yi
Summary: As the average grain size decreases, the reduction in intragranular dislocation storage ability is revealed as the underlying mechanism of the breakdown of Hall-Petch behavior in nanocrystalline (NC) metals. The prediction of the critical grain size for the HP-inverse HP transition of NC metals agrees well with experimental results, showing remarkable ductility enhancement in the inverse HP region dominated by harmonized deformation of grain boundaries and grain interior. Additionally, the increase in grain boundary strength leads to enhancement in yield strength and delay in occurrence of the inverse HP behavior in NC metals.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Nanoscience & Nanotechnology
Yu Wen, Bo Guan, Yunchang Xin, Chenglu Liu, Peidong Wu, Guangjie Huang, Qing Liu
Summary: The solute atom mediated Hall-Petch relations were investigated for Mg-Y, Mg-Al, Mg-Gd, and Mg-Zn alloys at a nominal solute content of 0.35 at.%. It was found that Mg-Y and Mg-Gd exhibited significantly lower Hall-Petch slope (k) values (220 MPa·μm(1/2) and 285 MPa·μm(1/2), respectively) compared to Mg-Al and Mg-Zn (324 MPa·μm(1/2) and 322 MPa·μm(1/2), respectively) under compression along the extrusion direction. The addition of Zn or Al led to a strong basal texture and predominantly basal slip deformation, while the addition of Gd or Y resulted in a weakened texture and activation of both {10 (1) over bar2} twinning and basal slip. This difference in deformation mechanisms contributed to the lower k values in Mg-Y and Mg-Gd alloys.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Frederic Sansoz, Xing Ke
Summary: The breakdown of grain-size strengthening to softening mechanisms in nanocrystalline alloys, particularly with regards to grain-boundary solute segregation, has been investigated through large-scale simulations. Three concentration-dependent regimes of plasticity were identified, including classical segregation strengthening, shear band-induced softening, and a previously unknown plateau of maximum strengths for intermediate solute contents. The findings highlight the complex roles of solute segregation and interfacial plasticity mechanisms in nanocrystalline alloys.
Article
Chemistry, Physical
Shuozhi Xu, Abdullah Al Mamun, Sai Mu, Yanqing Su
Summary: Metallic nanowires are widely used as small-scale structural materials due to their small volume and high strength. The mechanical properties of nanowires in pure metals are well understood, but the deformation in metallic alloys is still unclear. In this study, we perform atomistic simulations and find that dislocation slips and twinning control the plastic deformation of nanowires in refractory multi-principal element alloys (RMPEAs). Furthermore, we discover that RMPEAs have reduced tension-compression asymmetry compared to pure metals.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Bing Chen, Suzhi Li, Jun Ding, Xiangdong Ding, Jun Sun, En Ma
Summary: This study found that lattice distortion affects the mobility of dislocations in body-centered-cubic multi-principal element alloys. Lattice distortion influences the activation of kink nucleation and propagation for screw dislocation motion, as well as the strength of local pinning for edge dislocations. The lattice distortion can be used as an indicator to correlate with the reported brittleness of these alloys.
SCRIPTA MATERIALIA
(2023)
Article
Metallurgy & Metallurgical Engineering
Lei Liu, Xiaojie Zhou, Shilun Yu, Jian Zhang, Xianzheng Lu, Xin Shu, Zaijun Su
Summary: The effects of different treatments on the microstructure and mechanical properties of an extruded Mg-4.3Gd-3.2Y-1.2Zn-0.5Zr alloy were investigated. The study found that grain growth, texture changes, and stability of LPSO phases have an impact on the alloy's properties.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Coatings & Films
H. S. Maharana, K. Mondal
Summary: This study successfully developed pure Ni and Ni-MoS2 bulk nano-crystalline electrodeposited coatings and analyzed their mechanical and wear behavior. The crystallite size of Ni in Ni-MoS2 coatings varied with different loading levels of MoS2, showing an inverse Hall-Petch relation in hardness values. The wear resistance of Ni-MoS2 coatings was significantly improved compared to pure Ni electrodeposit, possibly due to the higher hardness caused by dispersion hardening. The wear behavior of the Ni-MoS2 coatings was correlated with crystal orientation, coating morphology and hardness to establish a possible abrasive wear mechanism.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Rebecca A. Romero, Shuozhi Xu, Wu-Rong Jian, Irene J. Beyerlein, C. Ramana
Summary: This article investigates the slip resistances of dislocations in multi-principal element alloys (MPEAs) and the role of lattice distortion. It is found that MPEAs containing Cr exhibit higher slip resistances and lower anisotropy compared to pure metals.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
A. Jagetia, M. S. K. K. Y. Nartu, S. Dasari, A. Sharma, B. Gwalani, R. Banerjee
Summary: This study reports a significant increase in the Hall-Petch coefficient (K) when Al is added to CoFeNi/CoCrFeNi alloys, attributed to ordering mediated nano-clustering in Al-containing HEA/CCAs. The increase in grain boundary strengthening is rationalized by the presence of Ni-Al rich nano-clusters, elucidated through atom probe tomography, which necessitate additional stress for overcoming coherency strain fields.
MATERIALS RESEARCH LETTERS
(2021)
Article
Materials Science, Ceramics
Mao Deng, Zhangyi Huang, Wanying Guo, Yang Shi, Junjing Duan, Jianqi Qi, Haomin Wang
Summary: Short-range order is a new strengthening effect that significantly affects the mechanical properties of high-entropy materials. Simulation results show that this effect suppresses grain size softening and leads to the disappearance of inverse Hall-Petch behavior in nano-crystalline high-entropy materials. In this study, the inverse Hall-Petch behavior is confirmed in translucent nanocrystalline high-entropy ceramic (HEC) with an average grain size below 10 nm, fabricated using a high-pressure low-temperature sintering technique. Moreover, the nanocrystalline HEC also exhibits improved fracture toughness compared to coarse-crystalline HEC.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Multidisciplinary Sciences
Jia Li, Yang Chen, Quanfeng He, Xiandong Xu, Hang Wang, Chao Jiang, Bin Liu, Qihong Fang, Yong Liu, Yong Yang, Peter K. Liaw, Chain T. Liu
Summary: Multi-principal element alloys (MPEAs) exhibit outstanding mechanical properties due to the distinct atomic lattice distortion effect, and the research reveals the strengthening mechanisms caused by heterogeneous lattice strain-induced unusual dislocation behaviors, leading to strength-ductility synergy.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Materials Science, Multidisciplinary
Wei Liu, Deli Gao
Summary: The study found that the median particle size is the predominant factor determining the TRS performance of the matrix body. Small-sized carbide particles deliver higher TRS, indicating that the fracture strength of the matrix body follows the Hall-Petch relation. By enhancing fracture strength, the service life of matrix-body PDC bits can be significantly extended, leading to reduced trips and substantial savings.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Xuehui Yan, Yong Zhang, Yu Zou
Summary: In this study, it was found that a cold-rolled bcc Zr50Ti35Nb15 medium-entropy alloy exhibited superior tensile ductility with near-superplastic behavior at elevated temperatures. The high-density dislocations induced by cold rolling facilitated dynamic recrystallization, which relieved stress concentration and enhanced its tensile ductility. This study demonstrates the near-superplastic behavior in bccMPEAs and suggests an effective route to enhance ductility in typically brittle bcc MPEAs through dynamic recrystallization.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Jing Xu, Bo Guan, Yunchang Xin, Xuedong Wei, Guangjie Huang, Chenglu Liu, Qing Liu
Summary: In this study, a weak texture dependence of Hall-Petch slope (k) in a rare-earth containing Mg-2Zn-1Gd plate was reported, with similar k values for TD-tension and RD-tension. This characteristic can be well predicted by the compound use of activation stress difference and geometric compatibility factor, attributing the mechanism to the activation of a high fraction of additional deformation mode.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Wahyu Setyawan, David J. Senor, Ram Devanathan
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2019)
Article
Materials Science, Multidisciplinary
Ram Devanathan, Weilin Jiang, Karen Kruska, Michele A. Conroy, Timothy C. Droubay, Jon M. Schwantes
JOURNAL OF MATERIALS RESEARCH
(2019)
Article
Multidisciplinary Sciences
Yongsoon Shin, Mohammad Fuad Nur Taufique, Ram Devanathan, Erika C. Cutsforth, Jaewon Lee, Wei Liu, Leonard S. Fifield, David W. Gotthold
SCIENTIFIC REPORTS
(2019)
Article
Multidisciplinary Sciences
Karen Kruska, Weilin Jiang, Xuemei Wang, Lin Shao, Brian J. Riley, Ram Devanathan
Summary: The distribution of dopants in CeO2 films after I2+ ion irradiation and heat treatment was studied with advanced characterization techniques, showing the feasibility of using this approach to analyze local compositions in samples exposed to extreme conditions.
Editorial Material
Materials Science, Multidisciplinary
Ram Devanathan, Laurent Capolungo
Article
Materials Science, Multidisciplinary
Ankit Roy, David J. Senor, Andrew M. Casella, Ram Devanathan
Summary: This study reports on the computational investigation of defect production and migration in two lithium aluminate ceramics: LiAlO2 and LiAl5O8. Li+ diffusion in LiAl5O8 was found to be significantly slower than that in LiAlO2, possibly due to stronger ordering in the Li-O6 octahedra. The higher lithium displacement threshold energy in LiAl5O8 suggests a lower likelihood of defect formation and clustering, and a lower tendency for amorphization.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ankit Roy, Aqmar Hussain, Prince Sharma, Ganesh Balasubramanian, M. F. N. Taufique, Ram Devanathan, Prashant Singh, Duane D. Johnson
Summary: Multi-principal element alloys (MPEAs) are gaining attention for their high-temperature microstructural and mechanical properties. Machine learning (ML) and materials informatics have been used to screen MPEAs, but optimizing new compositions with desirable properties remains a challenge. This study utilized a generative adversarial network coupled with a neural-network ML model to design MPEAs with high hardness, generating optimized compositions with higher hardness than the training data. The findings suggest that generative ML can greatly accelerate materials discovery and guide experiments.
Article
Materials Science, Multidisciplinary
Michele Fullarton, Giridhar Nandipati, David J. Senor, Andrew M. Casella, Ram Devanathan
Summary: In this study, a large-scale molecular dynamics (MD) simulation was conducted to examine displacement cascades in the near-surface region of pure nickel. The results showed that the production and clustering of vacancies were higher for near-surface cascades, while the production and clustering of self-interstitial atoms increased with depth. The effects of primary knock-on atom (PKA) energy and temperature on defect production were similar for both near-surface and bulk cascades.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Engineering, Manufacturing
M. F. N. Taufique, Martin Losada, Sebastien Hamel, Nir Goldman, Matthew J. DiTucci, Loubna Pagnotti, Daniel Willis, Matthew Torres, Ram Devanathan
Summary: To improve fuel economy, the automobile industry is incorporating more lightweight materials in car designs. However, adhesive developers lack a fundamental understanding of the chemistry that occurs in adhesives as joints age, which limits their ability to mitigate corrosion and thermal expansion issues. In this study, we developed molecular models for structural adhesives and applied simulations and calculations to gain insights into the influence of water molecules on the properties of epoxy-based adhesives. Experimental synthesis and characterization were also performed. The results highlight the impact of water molecules on the local structure of the epoxy network and the resulting mechanical properties.
INTEGRATING MATERIALS AND MANUFACTURING INNOVATION
(2023)
Article
Materials Science, Multidisciplinary
Ankit Roy, David J. Senor, Danny J. Edwards, Andrew M. Casella, Ram Devanathan
Summary: Radiation damage limits the use of high power proton beams in high energy physics research. The radiation damage in the alpha and beta-phases of Ti-6Al-4V and Ti-15V-3Cr-3Sn-3Al alloys was compared using simulation. The alpha-phase outperformed the beta-phase, suggesting that Ti-15V-3Cr-3Sn-3Al could be a promising candidate for next-generation beam window material.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ankit Roy, M. F. N. Taufique, Hrishabh Khakurel, Ram Devanathan, Duane D. Johnson, Ganesh Balasubramanian
Summary: The study uses machine-learning to down select corrosion-resistant alloys and optimize descriptors to predict the corrosion resistance of MPEAs. Findings demonstrate the potential and challenges of ML when applied to complex chemical phenomena like alloy corrosion.
NPJ MATERIALS DEGRADATION
(2022)
Article
Materials Science, Multidisciplinary
Osman Mamun, Madison Wenzlick, Arun Sathanur, Jeffrey Hawk, Ram Devanathan
Summary: In this study, a direct rupture life parameterization using a gradient boosting algorithm was shown to effectively train machine learning models for highly accurate prediction of rupture life in various alloys. The Shapley value was utilized to quantify feature importance, making the model interpretable by identifying the impact of different features on performance. Additionally, a generative model based on a variational autoencoder was used to sample hypothetical synthetic candidate alloys from the learned joint distribution.
NPJ MATERIALS DEGRADATION
(2021)
Article
Chemistry, Physical
Jon M. Schwantes, Jacob L. Bair, Edgar C. Buck, Ram Devanathan, Sean H. Kessler, Timothy G. Lach, Jason M. Lonergan, Bruce K. Mcnamara, Camille J. Palmer, Richard A. Clark
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Engineering, Manufacturing
Madison Wenzlick, Jennifer R. Bauer, Kelly Rose, Jeffrey Hawk, Ram Devanathan
INTEGRATING MATERIALS AND MANUFACTURING INNOVATION
(2020)
Article
Materials Science, Multidisciplinary
Madeeha Riaz, Manahil Najam, Hina Imtiaz, Farooq Bashir, Tousif Hussain
Summary: This study focuses on the structural and biological analysis of Zn-Cu based biodegradable alloys for orthopedic applications. The results indicate that the alloys have good electrical conductivity and biocompatibility, with potential for promoting bone growth and healing process. Additionally, the alloys exhibit a low corrosion rate and improved corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Rijo Rajeev, Sk Safikul Islam, Anitha Varghese, Gurumurthy Hegde, Suryasarathi Bose
Summary: In this study, a facile and selective electrochemical sensor was developed for the sensing of guanosine. The sensor utilized a unique porous structure and ordered framework, enabling linear detection of guanosine concentration in the range of 0.123-720 μM under specific conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Rafael V. M. Freire, Dominique Celeste de A. Dias, Jose Yago Rodrigues Silva, Dayane Kelly Dias do Nascimento Santos, Larissa T. Jesus, Ricardo O. Freire, Severino A. Junior
Summary: This study reports the extraction and isolation of euphol from nature, its adsorption in nanosized ZIF-8, and the efficacy of this system against cancer cells. Experimental and simulation results show that ZIF-8 can enhance the effectiveness of euphol against cancer cells and selectively target cancer cells.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Manal A. Awad, Awatif A. Hendi, Maha M. Almoneef, Maymunah Alwehaibi, Khalid M. Ortashi, Wadha Alenazi, Fatimah S. Alfaifi, Shareefa Alahmariye, Asma Alangery, Warda Ali Alghoubiri, Haia Aldosari
Summary: In this study, magnesium-doped zinc oxide nanoparticles were synthesized and characterized. The research findings show that magnesium doping can alter the crystal structure and optical properties of zinc oxide, while enhancing its dielectric constant.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
F. J. Willars-Rodriguez, I. R. Chaverz-Urbiola, M. A. Hernandez-Landaverde, A. Zavala-Franco, E. A. Chavez-Urbiola, P. Vorobiev, Yu V. Vorobiev
Summary: This study focuses on manganese doped CdS thin films synthesized by chemical bath deposition. The incorporation of Mn2+ cations in CdS was found to influence the crystalline structure, morphology, and optoelectronic properties. Doped thin films exhibited a uniform hexagonal structure, changed growth orientation, and showed scale-like and needle-like morphologies. The bandgap and rectification speed of Schottky diodes were modified by introducing manganese. This study suggests the potential for affordable high-speed optoelectronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Mehdi Javidi, Hooman Karimi Abadeh, Fatemeh Namazi, Hamid Reza Yazdanpanah, Narjes Shirvani Shiri
Summary: This study investigated the synergistic effect of temperature, solution velocity, and sulphuric acid concentration on the corrosion behavior of carbon steel using response surface methodology. The results showed that temperature affected anodic reactions, solution velocity influenced cathodic reactions, and acid concentration altered the corrosion mechanisms by changing the properties of the surface layer.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
R. Sakthivel, Thirumoorthy Kulandaivel, Kirankumar Venkatesan Savunthari, K. Mohanraj, Hans-Uwe Dahms, Aswin kumar Anbalagan, Manjunath Rangasamy, Kien-Voon Kong
Summary: In this study, saturated fatty acids were incorporated with silane to modify viscose fabric, resulting in superhydrophobic and superoleophilic properties. The modified fabric showed excellent separation efficiency for oil and organic solvents, with high absorption capacity. The modified fabric also exhibited durability and retained its properties in harsh conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Wei Zhang, Hong Lei, Wenqing Liu, Zefang Zhang, Yi Chen, Xiaogang Hu, Xiangshan Ye
Summary: In this study, EDTA-grafted alumina composite abrasives were produced by a two-step process for the CMP of sapphire substrates. Experimental results showed that the modified abrasives exhibited better dispersion properties and significantly improved polishing efficiency, with higher material removal rates and lower surface roughness. The combination of chemical reaction and mechanical action enhanced the CMP performance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Shumaila Rafaqat, Bushra Perveen, Warda Raqba, Warda Imran, Arshad Hussain, Naeem Ali
Summary: This study developed a MnP-based biosensor for quantitative measurement of dye concentrations using electrochemical signals. The effects of two different dyes on MnP activity were investigated, with one dye showing inhibitory effects and the other dye having no effect. The study demonstrates the potential application of enzyme-based biosensors in dye detection and toxicological monitoring.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jinyan Shi, Oguzhan Yavuz Bayraktar, Baris Bayrak, Burak Bodur, Ali Oz, Gokhan Kaplan, Abdulkadir Cuneyt Aydin
Summary: The elemental composition of precursors is crucial for the performance development of geopolymers. The use of lime instead of metakaolin increases the fluidity and mechanical properties of geopolymers, while the addition of gypsum decreases them. Furthermore, higher lime content exacerbates the negative effect of gypsum.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aayush Gupta, Kaveri Ajravat, Loveleen K. Brar, O. P. Pandey, Pandey Rajagopalan
Summary: This study focuses on the performance of Mn3O4-ZnO composite material in wastewater treatment and energy storage applications, and presents a detailed comparative analysis. Results show that the composite material with equal concentrations of Mn3O4 and ZnO exhibits excellent photocatalytic activity and high capacitance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
V. Murugabalaji, Matruprasad Rout, Harsh Soni, Biranchi Narayan Sahoo
Summary: This study focuses on the corrosion characteristics of AA 7075 and AA 7075 based hybrid composite fabricated using stir casting and hot rolling techniques. The results show that the hybrid composite produced by hot cross rolling exhibits better corrosion resistance compared to the base metal. The addition of a small amount of graphite improves the bonding between the matrix and reinforcements, and the hot cross rolling enhances this bonding, leading to the formation of a strong passivation oxide layer and increased charge transfer resistance, thereby improving corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Fangkun Ning, Qinghao Shi, Shuping Kong, Weitao Jia, Lifeng Ma
Summary: The paper investigates a new method of rolling sheets with variable chamfering amounts in both the transversal and normal directions. The feasibility of the technological process was tested through simulation and compared with experimental results. Three important process parameters, temperature, stress, and flow velocity, were used to evaluate the effects on chamfering amount before determining the optimal angle. The spread formula for evaluating the shape quality of the plate after ECR was obtained through testing and theory.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aqeel Abbas, M. A. Hussein, Mohamed Javid
Summary: In this study, the AM60 magnesium alloy was processed using high-energy ball milling, and the results showed that different reinforcement agents had certain effects on particle size, crystallite size, lattice strain, and dislocation density.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
D. S. Mahmoud, E. M. Eldesouki, W. M. Abd El-Gawad
Summary: The development of flexible and lightweight microwave-absorbing materials has become a trendy topic. This study focuses on enhancing the microwave-absorbing performance of butadiene-acrylonitrile rubber (NBR) by incorporating novel reinforcing nanofillers. The results show that the NBR nanocomposite with a loading of 16 parts per hundred rubber (phr) of LiFe 20%/Si has the best microwave-absorbing performance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)