Article
Mechanics
Shangbin Xi, Yu Su
Summary: This study investigates the effects of grain size on the mechanical behavior and phase transformation evolution of polycrystalline NiTi thin films using a non-isothermal phase field model. As the average grain size decreases, the temperature-induced martensitic transformation tends to be inhibited and polytwinned martensitic microstructures are replaced by single-variant martensite in the grains. Stress-induced martensitic detwinning and reorientation are less active for all martensite variants with decreasing grain size, leading to weakened shape memory functionality and delayed stress-induced martensitic transformation in superelastic behavior.
Article
Engineering, Mechanical
Dong -Dong Zhuang, Shu-Hao Zhang, Hai-Xia Liu, Jie Chen
Summary: Water jet equipment conforming to ASTMG134 international standard was used to explore the cavitation erosion behavior and anti-cavitation erosion mechanism of NiTi alloys. The cumulative mass loss rate of NiTi alloys changed slowly within 180 min, then sharply increased and decreased after 240 min. Prolonged impact time lengths did not significantly increase macroscopic deformation on the sample surface due to the superelasticity of NiTi alloys. Work hardening and cavitation pits appeared when the impact time length was 180 min. The formation of new grains and high residual stress inhibited the cavitation erosion damage on NiTi alloys caused by water jet impact.
Article
Biochemistry & Molecular Biology
Lijian Meng, Tao Yang
Summary: Nanostructured TiO2 films were deposited on Indium Tin Oxide (ITO) and glass substrates using dc reactive magnetron sputtering at various substrate inclination angles. The structural and optical properties of the films were analyzed using X-ray diffraction, scanning electron microscopy, and UV-Vis spectrophotometer. Dye-sensitized solar cells (DSSC) were constructed with these TiO2 films as photoelectrodes, and the impact of substrate inclination angle during film preparation on DSSC conversion efficiency was investigated.
Article
Chemistry, Physical
Shunli He, Lichun Zhang, Dan Tian, Zhiying Zhou, Anqi Guo, Bin Xia, Yadan Zhu, Fengzhou Zhao
Summary: In this study, high-quality Cs3Cu2Br5 thin films with good stability were prepared on GaN substrates by pulse laser deposition (PLD) for the first time. The morphology, crystal structure, and photoelectric properties of the Cs3Cu2Br5 thin films were systematically studied. A self-powered UV photodetector based on Cs3Cu2Br5/n-GaN heterojunction was fabricated, exhibiting two dominant responses in the UV region.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Fakhrodin Motazedian, Junsong Zhang, Zhigang Wu, Daqiang Jiang, Satyajit Sarkar, Mariusz Martyniuk, Cheng Yan, Yinong Liu, Hong Yang
Summary: This study presents an innovative approach to induce ultra-large elastic lattice strains in metallic thin films by using a martensitic transforming substrate, showing great potential for improving functional properties of thin film materials. By matching the lattice strain of the thin film with the crystallographic lattice strain of the substrate, reversible elastic lattice strains were achieved, offering a unique opportunity to engineer and enhance the properties of thin film materials.
MATERIALS & DESIGN
(2021)
Article
Engineering, Mechanical
Marek Szkodo, Alicja Stanislawska, Aleksandr Komarov, Lukasz Bolewski
Summary: The study found that there is a correlation between cavitation erosion resistance and hardness, H/E ratio, and surface elasticity.
Article
Chemistry, Physical
T. Roch, M. Gregor, S. Volkov, M. Caplovicova, L. Satrapinskyy, A. Plecenik
Summary: This study examined the impact of different substrates on the structure and orientation of niobium nitride thin films, revealing that films on C-Al2O3 substrate exhibited the best superconducting properties.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Aishanee Sur, Joe D. Simmons, Andrew A. Ezazi, Kyle J. Korman, Subham Sarkar, Ethan T. Iverson, Eric D. Bloch, David C. Powers
Summary: The study demonstrates the versatile platform of optically transparent, porous salt thin films for solid-state photochemistry and in operando spectroscopy. Photolysis efficiently reduces Mn-(III) sites to Mn-(II) sites.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Ceramics
Jayaraman Senthilselvan, Rajeev R. Pillai, Ramasubramanian Kannan, B. Baskar, Krishna Valleti, J. Manonmani
Summary: In this study, nanocrystalline TiN films were deposited on FTO coated glass substrates by cathodic arc deposition for the first time. The crystalline phase, grain size, hardness, electrical resistivity, and optical properties of the TiN films were investigated. The results showed that the nanocrystalline TiN films had excellent mechanical and electrical properties, making them suitable for use as counter electrodes in dye-sensitized solar cells.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Coatings & Films
Venkata A. S. Kandadai, Venkataramana Gadhamshetty, Bharat K. Jasthi
Summary: This study explores the pulsed laser deposition technique for synthesizing hexagonal boron nitride (hBN) thin films and investigates the influence of deposition temperature and buffer layer on the microstructure, mechanical, and wetting properties of the films.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Sandeep Kumar Chaluvadi, Zhe Wang, Laryssa M. Carvalho de Araujo, Pasquale Orgiani, Vincent Polewczyk, Giovanni Vinai, Olivier Rousseau, Victor Pierron, Alain Pautrat, Bernadette Domenges, Darrell G. Schlom, Laurence Mechin
Summary: This research successfully integrated high-quality LSMO thin films onto SOS substrates using advanced thin film growth techniques. Detailed characterizations showed competitive properties of the LSMO films. The fabrication of suspended micro-bridges through silicon micromachining demonstrated the potential use of LSMO magnetic layer on industrially compatible SOS substrates for applicative MEMS devices.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Ao Xia, Robin Dedoncker, Oleksandr Glushko, Megan J. Cordill, Diederik Depla, Robert Franz
Summary: The influence of nitrogen incorporation on the chemical composition, structure, mechanical, and electrical properties of refractory (MoNbTaVW)(1-x)N-x high entropy alloy thin films is investigated in this study. The structural change from body centered cubic to face centered cubic with increasing nitrogen content resulted in increased hardness but also material embrittlement. The films were synthesized by two different physical vapor deposition methods onto silicon and polyimide substrates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Andrew Bulla, Kanglong Wu, Chen Shen
Summary: The authors investigated the effect of repeated heating cycles on the phase and crystal structure of a few layers at a time. Equiatomic NiTi alloy was additively manufactured using twin-wire directed energy deposition-arc (TW-DED-arc). Microstructure characterization revealed the incorporation of silicon preventing the formation of NiTi2 and the existence of two types of B2 austenite in the matrix. Mechanical testing showed a maximum ultimate tensile stress of 782.5 MPa with a fracture surface indicative of quasi-cleavage failure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Mathematics, Applied
Ratnesh K. Pandey, Ram Pratap Yadav, Tanuj Kumar, Ashish Kumar, Sachin Pathak, Shikha Awasthi, Udai B. Singh, Avinash C. Pandey
Summary: The morphological evolution and fractal characterizations of CaF2 thin-film surfaces modified by bombardment with 100 MeV Au+8 ions at various fluences were studied. The relationship between surface morphology and ion fluence was investigated using atomic force microscopy (AFM) combined with line profile and two-dimensional power spectral density (2D-PSD) analysis. The surface erosion due to sputtering was described using Rutherford backscattering spectrometry. The dependency of structural characteristics on fluence was explored using glancing angle x-ray diffraction measurements.
Article
Materials Science, Multidisciplinary
Kipkurui Ronoh, Saleh H. Fawaeer, Vladimir Holcman, Alexandr Knapek, Dinara Sobola
Summary: An experimental investigation of electron beam physical vapour deposition of Ti, Au, and Ag metals on HOPG substrate to form HOPG-M thin films was conducted. The films were characterized using various techniques, revealing differences in morphology, topography, and surface chemistry among the metals. Raman and FTIR analyses showed variations in molecular structures and the presence of different functional groups on the thin films. The findings suggest the potential of HOPG as a substrate for preparing various M thin films.
Article
Materials Science, Multidisciplinary
Yong Guan, Yongchang Liu, Zongqing Ma, Huijun Li, Hongyao Yu
Summary: The hot deformation behavior and microstructure evolution of as-cast CoNi-based superalloy were investigated through hot compression tests, revealing a peak efficiency of 0.38 on the processing map at 1130 degrees C and a strain rate of 0.01 s(-1). The dominant recrystallization mechanism during hot working was found to be discontinuous dynamic recrystallization (DDRX) related to strain-induced grain boundary migration (SIBM), with additional recrystallization occurring through sub-grains around MC carbides and shear band formations. The presence of fine gamma ' precipitates was also noted to inhibit recrystallization.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Lianjie Li, Haibo Xie, Tianwu Liu, Xingsheng Li, Xu Liu, Mingshuai Huo, Enrui Wang, Jianxin Li, Hongqiang Liu, Li Sun, Zhengyi Jiang
Summary: In this study, an elastic-plastic multi-stand FE model considering the work hardening effect was proposed for investigating the influence of rolling force on strip shape. The results show that the strip crown exhibits varying trends at different stands with changes in rolling force. This research offers a new perspective on TCR simulation and enhances understanding of the impact of rolling force on strip shape.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jian Ren, Liming Yu, Chenxi Liu, Zongqing Ma, Huijun Li, Zumin Wang, Yongchang Liu, Hui Wang
Summary: This study investigated the effects of Al addition on the oxidation mechanisms of 16Cr ODS steel. The results showed that 16Cr-3Al ODS steel, with Al addition, exhibited superior oxidation resistance compared to 16Cr ODS steel. Thermodynamic calculations were used to explore the oxidation mechanisms of both ODS steels, and it was found that the improved oxidation resistance of 16Cr-3Al ODS steel was attributed to the lower diffusion rate of O in Al2O3.
Article
Engineering, Mechanical
Ba Hieu Nguyen, Ali Al-Juboori, Hongtao Zhu, Azdiar A. Gazder, Huijun Li, Kiet Tieu
Summary: White etching layers (WELs) on rail surfaces significantly impact rail life by promoting crack growth and leading to fracture. Mechanically-induced WELs, with higher hardness and more severe cracks compared to thermomechanically-induced WELs, are more detrimental to rail life.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Hamidreza Kamali, Haibo Xie, Hongyun Bi, E. Chang, Haigang Xu, Haifeng Yu, Zhengyi Jiang
Summary: Microstructure evolution, deformation-induced martensitic transformation, and texture evolution were investigated in a metastable austenitic stainless steel during bending under different strain rates. The results showed that the strain rate had a significant influence on the microstructure, martensitic transformation, and texture evolution. The findings also revealed location-dependent changes in these phenomena.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Jun Wang, Yao Lu, Fanghui Jia, Wenzhen Xia, Fei Lin, Jian Han, Ruichao Wang, Zengxi Pan, Huijun Li, Zhengyi Jiang
Summary: In this study, an equiatomic CoCrFeNiMn High Entropy Alloy (HEA) was successfully deposited using the powder-bed arc additive manufacturing (PBAAM) process, and its phase evolution, crystallographic orientation, dislocation morphology, precipitation, and mechanical performance were investigated. The results showed that the PBAAMed CoCrFeNiMn HEA has a stable solid-solution FCC structure and improved mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
G. K. Sujan, Huijun Li, Zengxi Pan, Daniel Liang, Nazmul Alam
Summary: The study found that post solution-annealed (SA) samples of IN718 superalloys fabricated using WAAM process maintained highly-textured solid-solution of gamma-matrix, but formed undissolved residual laves phases in Nb-enriched regions. High-temperature oxidation studies showed that oxidation mechanisms were temperature dependent, with the growth of oxide scale primarily dominated by the outward diffusion of Cr+3 cations.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Bintao Wu, Zhijun Qiu, Bosheng Dong, David Wexler, Zengxi Pan, Kristin Carpenter, Diego Raimundi Corradi, Huijun Li
Summary: In this study, the microstructure and mechanical properties of wire arc additively manufactured Ti6Al4V alloy with/ without magnetic arc oscillation were investigated. The results showed that the addition of magnetic arc oscillation resulted in refinement of the microstructure, modification of texture orientation, and improvement of mechanical properties of the deposition.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Mechanical
Fei Lin, Mengyuan Ren, Hui Wu, Yao Lu, Mingshuai Huo, Ming Yang, Zhixin Chen, Zhengyi Jiang
Summary: TiC-graphene dual-reinforced Al matrix hybrid nanocomposites (AMHNs) were synthesized using powder metallurgy. The microstructures, compressive properties, and tribological properties of the AMHNs with varying fractions of graphene nanoplatelets (GNPs) were investigated. The results showed that the addition of GNPs homogenized the microstructures and distributions of TiC and GNPs, resulting in improved compressive and wear resistance properties. The composite with 5.0 wt% TiC and 1.0 wt% GNPs exhibited the highest wear resistance with a wear rate reduction of 94.4% compared to the unreinforced Al alloy.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Abdul Haseeb Afridi, Hongtao Zhu, Eduardo Tovar Camacho, Guanyu Deng, Huijun Li
Summary: Rolling contact fatigue (RCF) crack is a dominant form of damage on rail surfaces caused by repeated contact with wheels. If left untreated, RCF defects such as squats and head checks can lead to rail fractures. Accurately predicting the damage under different operational conditions is crucial. A two-stage simulation strategy was proposed, investigating the mechanisms of RCF-induced cracks on rails through dynamic FEM for wheel-rail interaction and coupled static FEM/BEM for crack growth. The study found two critical wheel positions for crack propagation during wheel approach and departure from pre-existing cracks.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Materials Science, Multidisciplinary
S. S. Chen, P. D. Song, J. Yin, K. Qi, H. D. Li, L. Hou, W. H. Li
Summary: This study reports on a plasma electrolytic oxidation (PEO)-treated Mg-Zn-Ca-Si amorphous alloy composite with enhanced plasticity and corrosion resistance. The coated material exhibits excellent mechanical properties in compression and a significant decrease in corrosion current density after treatment.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Chemistry, Physical
Tri Dinh Vo, Anh Kiet Tieu, David Wexler, Lihong Su, Cuong Nguyen, Guanyu Deng
Summary: This study investigates a novel solid self-lubricating composite, EHEA-Ag, which exhibits excellent mechanical properties and wear characteristics in the temperature range from room temperature to 600 degrees Celsius.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yangfan Wang, Zhiyang Wang, Arman Hobhaydar, Zhijun Qiu, Bosheng Dong, Qinfen Gu, Zengxi Pan, David Wexler, Hanliang Zhu, Xizhang Chen, Mingxing Zhang, Huijun Li
Summary: Novel low activation medium entropy alloys (MEAs) of FeCr2V and FeCr2VW0.1 were developed as potential nuclear structural materials. The materials were fabricated using arc melting and their microstructure and mechanical properties were investigated. The results show that the developed MEAs exhibited a dual-phase microstructure consisting of body-centered-cubic (BCC) phases. The addition of W significantly enhanced the solid solution strengthening (SSS) and precipitation strengthening (PS) in the studied alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Editorial Material
Materials Science, Multidisciplinary
Guanyu Deng, Hongtao Zhu, Anh Kiet Tieu
Review
Engineering, Mechanical
Khai K. Huynh, Sang T. Pham, Kiet A. Tieu, Shanhong Wan
Summary: Carbon-based tribofilms and/or nanomaterials have emerged as potential solutions to the current shortcomings of phosphorus- and sulphur-rich tribofilms and coatings. These tribofilms have the capability to continuously repair/replenish themselves during sliding, making them of significant interest.
Article
Engineering, Mechanical
Yankui Song, Ke Xiao, Guo Xiang
Summary: The novelty of this study lies in constructing an Entropy-based wear and fluid-solid-thermal (FST) coupled model for journal bearings, and revealing the transient interaction behavior between wear evolution and FST evolution during repeated starting and stopping. The wear rate is measured experimentally, and the contact temperature, friction coefficient and normal contact force are obtained from the validated FST model. Wear tests and numerical calculations are conducted to validate the predicted wear rate and investigate the time-varying wear and FST evolution of journal bearings.
Article
Engineering, Mechanical
Xin-long Liu, Xin Guan, Yuan Zhong, Qian Xiao, Yong Cao, Wu-lue Zhang, Song Zhang, Yi-ting Zheng, Ming-sheng Gao, Dao-yun Chen, Wen-bin Yang
Summary: Gaps in the conductor rail joints of intercity trains have an impact on current transmission and the wear of carbon skateboards. These gaps decrease the coefficient of friction, increase electrical contact resistance, and affect the wear rate of carbon skateboards.
Article
Engineering, Mechanical
Yuhang Wu, Conglin Dong, Xiuqin Bai, Chengqing Yuan
Summary: The study developed a new composite material by incorporating hexagonal boron nitride (h-BN) particles into a thermoplastic polyurethane (TPU) matrix, which exhibited excellent self-lubricating properties and reduced frictional excitation forces. The addition of h-BN particles effectively reduced the coefficient of friction, decreased fluctuation amplitude, enhanced wear resistance, and attenuated vibration behaviors.
Article
Engineering, Mechanical
Tiancheng Ouyang, Xiuyang Sun, Wentao Tang, Yinxuan Li, Zhi Qun Tian, Yanzhou Li
Summary: By adding nitrogen-doped graphene and C60 nanoparticles to the lubricant, a highly efficient nano-lubricant with vibration and noise reduction properties is synthesized.
Article
Engineering, Mechanical
Xin Zhuo, Jun Cao, Haibo Huang, Li Liu, Xinkun Suo, Peiqing Ye, Zeshan Abbas
Summary: A polymer coating prepared by liquid spraying technology on the surface of 20CrMo steel demonstrates good tribological and anti-cavitation erosive properties. It can effectively replace CuPb24Sn copper alloy in valve plates for pumps under different lubrication conditions. The coating exhibits adhesive wear and reduces frictional loss, and mainly shows abrasive wear under complex working conditions. Its lipophilicity, high hardness to elastic modulus ratio, and corrosion resistance are the main influencing factors for its performance.
Article
Engineering, Mechanical
Md. Aminul Islam, Jiaren (Jimmy) Jiang, Yongsong Xie
Summary: Erosion-corrosion is a major factor in material loss and reduced useful life of hydro-transport equipment. This study evaluates the erosion-corrosion characteristics of different materials and finds that matrix wear affects the degradation of carbides. Sufficient wear and corrosion resistance in the surrounding matrix are important for good erosion-corrosion resistance.
Article
Engineering, Mechanical
Andre Dubois, Oussama Filali, Laurent Dubar
Summary: This study investigates the effect of surface roughness, contact pressure, and lubrication on the onset of galling in aluminum 6082-T6 using a pin-on-plate tribometer. The experimental results show that the roughness and lubricants play a significant role in preventing galling.
Article
Engineering, Mechanical
Jizhan Wu, Peitang Wei, Guoqiang Liu, Difa Chen, Xiuhua Zhang, Taimin Chen, Huaiju Liu
Summary: This study conducted a comprehensive evaluation of the DLC coating treatment on the loading capacity of gears and characterized the surface features and fatigue performance. The results demonstrate that DLC coating significantly improves the hardness and surface residual compressive stress of the gears, as well as enhances their contact fatigue performance.
Article
Engineering, Mechanical
Yangping Liu, Hwaran Lee, Annsley Mace, Jeremy L. Gilbert
Summary: An AFM-based single asperity tribology method was used to investigate the wear performance of carbides and base metal matrix in high carbon CoCrMo alloy. The wear behavior of the two types of carbides was stress-dependent and influenced by chemical composition. Cr-rich carbides exhibited higher wear resistance compared to Mo-rich carbides.
Article
Engineering, Mechanical
Zdenek Riha, Michal Zelenak, Akash Nag, Jakub Poloprudsky, Tomas Kruml, Sergej Hloch
Summary: This study investigates the erosion performances of a high-speed modulated jet (MWJ) and continuous water jet (CWJ). By comparing different nozzles and water jet powers, the effects of modulated and continuous jets on aluminum alloy were studied. The results show that under certain conditions, modulated jet can create deeper and sharper grooves while reducing the impact of lateral flow.
Article
Engineering, Mechanical
Chunyu Yu, Weipu Li, Yang Guo, Xianbin Sun, Fanli Hong, Ning Sun, Qinghai Zhang
Summary: This study explores the relationship between the wear rate of train brake pads and its features, and proposes a method for predicting the wear rate suitable for small sample data. Grey relational analysis and Pearson correlation analysis are used to determine the preferred features that affect the wear rate, and a BOA-BP model is established for prediction. The results show that BOA-BP exhibits better advantages in prediction with small samples.
Article
Engineering, Mechanical
Shan Yin, Xin Zhao, Shuangchao Huang, Zefeng Wen, Xuesong Jin
Summary: This study simulated the rolling contact of a driving wheelset over tangent and curved tracks at a speed up to 500 km/h using an explicit finite element approach to derive creep curves. The comparison between quasi-steady curves and transient curves in the presence of rail corrugation helped to identify cases where traditional theories are inapplicable and where transient effects must be considered. Additionally, the study further analyzed the influence of middle/high-frequency vibrations in the presence of rail corrugation.
Article
Engineering, Mechanical
Jiyao Zhang, Yuanlie Yu, Junlei Tang, Yingying Wang, Honggang Sun, Kaikai Song, Jianhong Gong, Pingping Liu, Xiaoming Liu, Lina Hu, Parthiban Ramasamy, Juergen Eckert
Summary: The influence of high-carbon addition on the microstructure, hardness, and wear behavior of CoCrNi alloy was investigated. It was found that the addition of carbon resulted in the formation of carbide particles, enhancing the hardness and improving the wear resistance. Fracture and detachment of hard carbides during friction introduced additional abrasive particles, transitioning the wear mechanism from adhesive-dominated to abrasive-dominated.
Article
Engineering, Mechanical
Yanfei Liu, Shengtao Yu, Ruize Zhang, Xiangyu Ge, Wenzhong Wang
Summary: This study reports the tribological behavior of nanodiamond plate (NDPL) as a nanoadditive for the first time and compares it with nanodiamond particles (NDPA). The results show that NDPL provides better lubrication performance at higher concentrations, and the sliding between NDPLs and the structural transformation from sp3 to sp2 carbon play a crucial role in lubrication and wear resistance.
