Article
Nanoscience & Nanotechnology
Bang An, Yaqiang Wang, Kai Wu, Jinyu Zhang, Gang Liu, Jun Sun
Summary: Nanostructured metallic multilayers (NMMs) have been widely studied as efficient accident-tolerant fuel (ATF) materials. In this work, Cr75Al25/Zr (CA/Zr) NMMs with different layer thicknesses were prepared and subjected to He+ implantation. The results showed that the interface of the NMMs changed from crystalline/crystalline to crystalline/amorphous when the thickness decreased to 25 nm, accompanied by a transition from strengthening to softening behavior. The study also found significant irradiation hardening in the NMMs, which was attributed to the interactions between He bubbles and dislocations, as well as the increased back-stress hardening at different thicknesses.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Chao Zhang, Lijun Shao, Yuming Dai, Duo Li, Yuan Chen
Summary: The mechanical properties of nanocrystalline pure Ni films degrade due to grain coarsening when exposed for a long time. In order to improve the mechanical properties, Mo-W co-doped Ni/Ni3Al multilayered structures were constructed. The average grain sizes and crystallinity degrees decrease when the individual layer thickness is below 40 nm. At 40 nm, nano-twins are observed due to the reduction of stacking fault energy. The hardness of the multilayers is enhanced and the elastic modulus is reduced. The best mechanical performance is observed in the Mo-W-doped Ni/Ni3Al multilayer with a thickness of 10 nm.
Article
Chemistry, Physical
Cristiane B. Goncalves, Rafael T. da Silva, Gustavo Dalenogare, Isabelle M. D. Gonzaga, Lucia H. Mascaro, Mateus M. Ferrer, Marcelo Assis, Elson Longo, Hugo B. de Carvalho, Antonio C. Doriguetto
Summary: This study presents a comprehensive analysis of morphology, microstructure, and optical properties of electrodeposited Cu2O thin films on SnO2:F substrates. The films exhibited stability, purity, and crystallinity, with various morphologies and growth orientations. These findings make a significant contribution to the exploration of multifunctional semiconductor materials for various advanced technologies.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Bingyang Ma, Xiaoben Qi, Rongbin Li, Rulin Zhang, Hailong Shang
Summary: In this study, Al-Zr nanocrystalline alloy films were prepared by magnetron sputtering with Zr contents ranging from 0 to 8.3 at.%. The films exhibited a supersaturated solid solution structure of Zr in the Al lattice, with added Zr atoms segregating at grain boundaries. The film's hardness increased gradually with Zr content, mainly due to grain refinement, solid solution, and nanocrystalline solution pinning strengthening mechanisms. Among these mechanisms, grain refinement was the most significant contributor, followed by solid solution strengthening and nanocrystalline solution pinning strengthening.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Chao Zhang, Siyi Ouyang, Sai Niu, Yue Zhao, Baosen Zhang, Yueqiao Feng, Yuan Chen
Summary: Ni-based multilayered film with 5 at.% Mo and 5 at.% W content has been synthesized. The individual layer thickness was modulated from 10 nm to 160 nm. The multilayer exhibited excellent thermal stability and improved hardness with reduced individual layer thickness. The 40 nm individual layer thickness resulted in superior toughness due to crack deflection and less brittle phase precipitation.
Article
Materials Science, Multidisciplinary
Chao Zhang, Wudong Si, Yin Wang, Sichao Dai, Da Shu
Summary: Annealing heat treatment resulted in refinement of crystalline structure and phase separation in Ni-Mo and Ni-Mo-W coatings, with the formation of Mo-W intermetallic precipitates. The coatings showed increased hardness and elastic modulus, with different mechanisms responsible for hardening at different annealing temperatures. Wear resistance was improved by the formation of lubricated oxides and enhanced H/E ratio in the coatings annealed at lower temperatures.
Article
Materials Science, Multidisciplinary
Ramazan Karslioglu, Mustafa Akcil, Ahmet Alp, Hatem Akbulut
Summary: The microstructural and tribological properties of nickel-cobalt alloys and MWCNT-reinforced Ni-Co nanocomposite coatings were investigated. The addition of MWCNTs enhanced the hardness, wear resistance, and reduced the friction coefficient. PRC type current provided better tribological properties for both unreinforced and MWCNT-reinforced Ni-Co alloys.
Article
Materials Science, Multidisciplinary
Andres Felipe Ordonez Jimenez, Henry Samir Vanegas, Carlos Mauricio Moreno, Jhon Jairo Olaya, Yaneth Pineda
Summary: CrAlTiN-Si coatings have the ability to prolong the operational life and improve the performance of cutting tools due to their exceptional mechanical, thermal, and tribological properties. The incorporation of silicon significantly influenced the chemical composition, microstructure, and mechanical properties of the coatings.
Article
Materials Science, Multidisciplinary
Smita G. Rao, Rui Shu, Siyang Wang, Robert Boyd, Finn Giuliani, Arnaud le Febvrier, Per Eklund
Summary: This study investigates the growth mechanism and mechanical properties of CrFeCoNi/TiNbZrTa multilayers grown by magnetron sputtering. The results show that multilayers with thickness less than 20 nm exhibit an amorphous structure, while the multilayer with a thickness of 20 nm has the highest hardness. The hardness decreases when the thickness exceeds 30 nm.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Coatings & Films
Sami Bin Humam, Gobinda Gyawali, Auezhan Amanov, Tae Ho Kim, Soo Wohn Lee
Summary: This study investigated the influence of codeposited TaC particles on the microstructure of Ni-W matrix and applied ultrasonic nanocrystal surface modification (UNSM) technique to explore the surface characteristics, mechanical, and tribological performance of Ni-W-TaC composite coatings. The incorporation of TaC in the microstructure and nanostructured surface modification significantly improved the microhardness and led to a reduction in the coefficient of friction under dry lubrication conditions.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Roberto Cestaro, Peter Schweizer, Laetitia Philippe, Xavier Maeder, Albert Serra
Summary: In this study, Mn3O4 and Mn2O3 were synthesized through electrodeposition and thermal treatment. The effects of different parameters on the structure and optical properties of manganese oxides were investigated, and it was found that the applied voltage played a key role in controlling the valence state of initial amorphous manganese.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Li-Yun Tian, Levente Vitos, Raquel Lizarraga
Summary: This study investigates the thermal effects on the elastic and thermodynamic properties of Al-Li and Al-Cr alloys using density-functional theory, finding that higher temperatures lower the modulus values while the addition of Li or Cr increases the Young's modulus. In the case of Al-Cr alloys, the Young's modulus increases linearly with higher Cr concentrations.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Chemistry, Physical
Rumana Akhter, Zhifeng Zhou, Zonghan Xie, Paul Munroe
Summary: In this study, a series of NiCrN coatings with varying Ni concentrations were deposited onto AISI M2 tool steel substrates through CFUMSIP, revealing high hardness values in coatings with lower Ni content and grain refinement at higher NiCr target currents. NiCrN coatings deposited at I-NiCr >= 2 A showed significant damage-tolerance and good hardness values.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Xinshu Zou, Mounika Rachakonda, Shufen Chu, Xiaoran Zhao, Joydip Joardar, Kolan Madhav Reddy
Summary: Rhombohedral Cr5Al8 nanoparticles were successfully synthesized and fabricated into dense bulk material with excellent hardness and fracture toughness, superior to its intermetallic compound counterpart.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Y. Jiraskova, J. Bursik, O. Zivotsky, J. Lunacek, P. Alexa, R. Uhlar, J. Ederer, P. Janos
Summary: Magnetite and magnetite/ceria composites were prepared using chemical methods and underwent calcination treatment. The ceria content and calcination temperature were found to greatly affect the degradation ability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Eugene Medvedovski, Mohsen Roghanizad, Gerardo Leal Mendoza, Wenjun Cai, Robert W. Hendricks
ADVANCED ENGINEERING MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Jia Chen, Jianwei Xiao, Jonathan Poplawsky, F. Marc Michel, Chuang Deng, Wenjun Cai
Article
Materials Science, Multidisciplinary
Kaiwen Wang, Yinan Wang, Xiaowei Yue, Wenjun Cai
Summary: The research developed a finite element based multiphysics model to analyze the synergistic effects of mechanical and corrosion properties on tribocorrosion degradation mechanisms. Residual stress near the wear track edge led to concentrated corrosion current, causing non-uniform surface corrosion and stress-corrosion coupling which affected the tribocorrosion rate. Predictive tribocorrosion rate maps were generated based on material properties, showing that metals with specific properties are most resistant to tribocorrosion.
Article
Engineering, Mechanical
Kaiwen Wang, Wenjun Cai
Summary: A multiphysics finite element model was developed to study the material deformation and degradation during tribocorrosion from wear, corrosion, as well as their synergy, providing insights into the design and optimization strategies of NMMs against tribocorrosion. The effects of individual layer thickness and layer orientation on the tribocorrosion behavior of Al/Cu NMMs were studied, showing their impact on subsurface stress, plastic strain distribution, and localized surface corrosion kinetics.
Article
Engineering, Industrial
Yinan Wang, Kaiwen Wang, Wenjun Cai, Xiaowei Yue
Summary: The proposed physics-informed data-driven surrogate model, named Neural Process Aided Ordinary Differential Equation (NP-ODE), outperforms benchmark methods in both simulation and real FEA data with the smallest predictive error and most reasonable confidence intervals.
Article
Materials Science, Multidisciplinary
Jia Chen, Tse-Ming Chiu, Wenjun Cai
Summary: The effects of magnetic field on the corrosion behaviors of A572 steel were investigated in 0.6 M sodium chloride solution. The results showed that the weight loss of A572 steel decreased and the corrosion potential increased while the corrosion current density decreased under the applied magnetic field. Analysis also confirmed the effective inhibition of anodic metal dissolution by the magnetic field.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Electrochemistry
Kaiwen Wang, Wenjun Cai, Hui Tian, Charles E. Reece
Summary: In this study, a finite element model was developed to investigate the electrochemical polishing mechanisms of niobium in superconducting radio-frequency cavities. It was found that a low temperature coolant with intermediate flow rate can improve the polishing effect.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Zhengyu Zhang, Yi Yao, Liping Liu, Tianyou Mou, Hongliang Xin, Lin Li, Wenjun Cai
Summary: This study investigates the effects of chromium concentration on the mechanical and surface properties of CoCrFeNi alloys using spin-polarized density functional theory calculations. It is found that higher chromium concentration can enhance the Young's modulus, Poisson's ratio, and surface reactivity of the alloys.
JOURNAL OF MATERIALS RESEARCH
(2022)
Review
Electrochemistry
Ebenezer O. Fanijo, Joseph G. Thomas, Yizheng Zhu, Wenjun Cai, Alexander S. Brand
Summary: This article systematically reviews and discusses the application of advanced surface characterization techniques for surface corrosion monitoring in metals at the micro- and nanoscale. It also presents the in situ, real-time nanoscale topography evolution method that enables measurement of time-dependent local dissolution rate. The study highlights the importance of correlative advanced techniques in identifying nanoscale corrosion mechanisms and improving corrosion predictive models.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Kaiwen Wang, Zhengyu Zhang, Raja Shekar B. Dandu, Wenjun Cai
Summary: In this study, a crystal-based tribocorrosion modeling framework was developed based on experimental and computational investigations of Al single crystals. The effects of lattice reorientation and dislocations on surface corrosion were taken into account. The experimental results showed that the tribocorrosion rate was independent of the initial crystal orientations. A multiphysics finite element model was developed and successfully predicted the depassivation and repassivation currents during tribocorrosion. The decrease of orientation-dependence during tribocorrosion was explained in terms of the coupling between un-rotated and rotated lattices.
Article
Physics, Applied
Yi Yao, Zhengyu Zhang, Wenjun Cai, Lin Li
Summary: This study investigates the synergic effect of crystallographic orientation and Cr content on the deformation behaviors of single-crystal CrCoFeNi multi-principal element alloy (MPEA) through atomistic simulations. It is found that the activation of multiple slip systems along [100] and [111] orientations leads to the formation of sessile dislocations and a dense dislocation network, while the activation of only two slip systems along the [110] direction results in deformation-induced nanotwins. The influence of Cr concentration and planner defect energies becomes prominent in the latter case. These findings provide a fundamental understanding of the deformation mechanisms in MPEAs, highlighting the synergic effect of crystal orientation and composition on tuning the mechanical behaviors.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Mechanical
Wenbo Wang, Micheal Kattoura, Stan Bovid, Zhengyu Zhang, David Lahrman, Wenjun Cai
Summary: This study investigated the effects of nanosecond laser shock peening (ns-LSP) parameters on the surface tribocorrosion resistance of WE43 Mg alloys. It was found that the corrosion cathodic reaction rate was decreased and tribocorrosion rate was reduced by 47.8% under lower laser power density and overlapping ratio conditions.
Article
Nanoscience & Nanotechnology
Wenbo Wang, Chang-Yu Hung, Leslie Howe, Jia Chen, Kaiwen Wang, Vinh X. Ho, Shannon Lenahan, Mitsuhiro Murayama, Nguyen Q. Vinh, Wenjun Cai
Summary: The application of femtosecond laser shock peening (fs-LSP) effectively improves the surface mechanical, corrosion, and tribocorrosion properties of WE43 magnesium alloys, enhancing their potential usage as biodegradable orthopedic implant materials. The combination of a black tape and a quartz layer under a power density of 28 GW/cm(2) was found to give the optimum peening effect, strengthening the surface and reducing corrosion kinetics simultaneously. The rapid self-repassivation observed in fs-LSP-treated WE43 surfaces during tribocorrosion promises sustained corrosion resistance under mechanical loading, critical for load-bearing implants.
ACS APPLIED BIO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
R. Joey Griffiths, David Garcia, Jie Song, Vijay K. Vasudevan, Matthew A. Steiner, Wenjun Cai, Hang Z. Yu
Summary: The study investigates the process-microstructure linkages in additive friction stir deposition using aluminum-magnesium-silicon alloy and copper, showing that the microstructure in aluminum-magnesium-silicon evolves primarily through continuous dynamic recrystallization, while copper exhibits heterogeneous microstructure due to discontinuous recrystallization. The differences in microstructure evolution are attributed to intrinsic thermomechanical properties and interactions with the tool head.
Article
Materials Science, Multidisciplinary
Srikant Gollapudi, Wenjun Cai, Supriya Patibanda, Koteswararao V. Rajulapati, Lakshman Neelakantan
EMERGENT MATERIALS
(2020)
