Article
Chemistry, Analytical
Changlong Zhao, Chen Ma, Junbao Yang, Ming Li, Qinxiang Zhao, Hongnan Ma, Xiaoyu Jia
Summary: Due to prolonged exposure to harsh environments, shaft parts often suffer from corrosion, wear, and other issues, leading to failure and inability to continue functioning. This study utilized ANSYS simulation platform to design an orthogonal experimental scheme for numerically simulating the laser cladding process of Inconel 718 alloy powder on 4140 alloy structural steel. Through multi-field-coupled numerical simulations, optimal cladding parameters were obtained to minimize residual stress in the clad layer.
Review
Materials Science, Multidisciplinary
Zhijie Jing, Peng Xu, Qibin Liu, Chuan Yu
Summary: Laser cladding technology has attracted significant attention in metal surface repair and remanufacturing research. However, excessive residual stress poses a major obstacle to its practical application in aerospace, engineering machinery, and other industries. This comprehensive review discusses recent advances in releasing residual stress in laser cladding, including the influence of laser parameters, material characteristics, and matching heat treatment methods. Additionally, a new concept and technique involving phase transformation for residual stress release during the cladding process are presented.
JOURNAL OF LASER APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Liangxiao Nian, Miaohui Wang, Xueyuan Ge, Xin Wang, Yifei Xu
Summary: In order to improve cladding coating quality and prevent cracking, this paper developed a thermo-mechanical coupling simulation model for extreme high-speed laser cladding. Process parameters were investigated to understand their impact on the coating morphology. Numerical calculations and temperature field simulations were conducted to validate the influence of temperature gradient and cooling rate on coating structure and residual stress distribution. The results showed that optimal coating quality could be achieved with specific laser power, cladding rate, and powder feeding rate. The microstructure and residual stress of the coatings were affected by the temperature gradient and cooling rate.
Article
Materials Science, Coatings & Films
Changyu Liu, Peng Xu, Shaobo Li, Jiangshan Li
Summary: In this study, a Fe-based SMA/PZT composite coating was fabricated and the effect of different PZT doping amounts on the coating performance was investigated. It was found that the coating with 1 wt% PZT doping amount exhibited the highest microhardness and the best wear resistance. After doping with PZT, the grain size and stacking fault energy of the coating decreased. During the laser cladding process, a γ→ε phase transition occurred in the composite coating, and PZT doping had both promoting and hindering effects on the phase transformation.
SURFACE & COATINGS TECHNOLOGY
(2022)
Review
Materials Science, Multidisciplinary
Mingke Li, Kepeng Huang, Xuemei Yi
Summary: Laser cladding is a novel surface treatment technology that uses a high-energy laser beam to melt different alloy compositions and form a specialized alloy-cladding layer on the surface of the substrate to enhance its property. However, it can generate substantial residual stresses, leading to the formation of various types of cracks. This paper comprehensively reviews crack types and their causes in laser cladding coatings and proposes strategies, such as optimizing coating layer material and refining coating process parameters, to control coating cracks. It also summarizes crack control methods for emerging structural materials and novel preparation processes, and analyzes the prospects, technical approaches, and key research directions for effectively controlling cracks in laser cladding coatings.
Article
Materials Science, Multidisciplinary
Changyu Liu, Peng Xu, Chi Pang, Gangqiang Zha, Zhi Ouyang, Jianhua Chen
Summary: A Fe-Mn-Si shape memory alloy/nano-WC coating was prepared on the surface of 304 stainless steel by laser cladding, and its phase composition, microstructure, and properties were analyzed. The results showed that the coating exhibited high microhardness and excellent wear resistance due to the specific phase transformation process, with the addition of WC significantly increasing the microhardness and reducing the friction coefficient and wear loss.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Nan Zhang, Yi-fei Xu, Miao-hui Wang, Xiao-dong Hou, Bo-rui Du, Xue-yuan Ge, Hua Shi, Xu Xie
Summary: The study prepared M2 high speed steel coating on a 42CrMo steel substrate using ultra-high speed laser cladding technique. The results showed a dentate metallurgical bonding between the M2 cladded coating and the 42CrMo steel substrate. The morphology of the M2 coating varied from corn shape at the interface to column shape in the middle zone and a basket shape near the surface. The near-surface zone of the M2 coating consisted of residual austenite, lamellar twinning martensite, and network carbides.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Engineering, Manufacturing
Taisei Izumi, Masayuki Arai
Summary: The study aimed to predict and minimize the residual stress and distortion in the laser cladding process. Three-dimensional finite element models were used to simulate the process, and the effects of preheating, fixing, scanning patterns, and cooling conditions on reducing residual stress and distortion were investigated. The results showed that these measures had a positive impact on reducing the stress and distortion.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
Qian Wang, Fa Qiang Chen, Qian Li, Liang Zhang, Hui Jin, Jun Wei Zhang
Summary: This study investigates the effects of electromagnetic compound field (ECF) assisted laser cladding on Ni60 high-hardness alloy coatings. The study focuses on the surface topography, phase composition, microstructure, and properties of the coatings. The results show that ECF has no effect on the phase composition but significantly influences the microstructure. Increasing the electromagnetic parameters further refines the grains and improves the hardness, corrosion resistance, and wear resistance of the coatings.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Physics, Multidisciplinary
Xiaoxi Qiao, Tongling Xia, Ping Chen
Summary: High-speed laser cladding technology is an effective surface technique for improving the wear and corrosion resistance of mechanical parts. The study developed numerical models to investigate the influence of overlap ratios on the thermal-stress evolution, residual stresses, and deformations. Results show that increasing the overlap ratio can alleviate stress changes and reduce residual deformation while increasing average residual stress.
Article
Engineering, Manufacturing
Wei Chen, Lianyong Xu, Yongdian Han, Lei Zhao, Hongyang Jing
Summary: DED technology, also known as AM, is a rapid prototyping method for metallic components, but can lead to the formation of excessive tensile residual stress. This study investigated the residual stress properties in DED parts made of low-temperature transformation pre-alloyed powders, and showed the potential of reducing residual stress through the austenite-to-martensite transformation in cooling.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Fangping Yao, Lijin Fang
Summary: In order to enhance work efficiency and conserve resources during the laser cladding process on H13 steel surface, a plane continuous heat source model was utilized via COMSOL for simulating temperature and stress fields. Optimal power and scanning speed were determined, with thermal stress increasing with greater laser power and scanning speed. Dual thermal stress peaks were observed in the molten pool, while no distinct peaks were found outside. Validation of simulation results was done through experimental cladding.
Article
Optics
Qi Zhang, Peng Xu, Gangqiang Zha, Zhi Ouyang, Detao He
Summary: The study simulated the cladding process of Fe-Mn-Si-Cr-Ni shape memory alloy coating using ANSYS software. The results showed that the shape of the molten pool in single-track cladding was half-scoop, reaching a peak temperature of 2600 degrees Celsius in multi-track cladding, and the stress distribution exhibited tensile-compression-tensile.
Article
Chemistry, Physical
Xuming Pang, Jianxin Jiang, Bin Li, Danyang Zhao, Jianxin Zhou
Summary: The Ni/TiN-La2O3 single-layer cermet coating designed in this study shows excellent optical properties and hardness in a wide temperature range, with stable absorption of solar energy, indicating potential applications.
SURFACES AND INTERFACES
(2021)
Article
Energy & Fuels
Chunyu Yin, Rong Liu, Yongjun Jiao, Shengyu Liu, Zhengang Duan, Shixin Gao, Liang He, Ping Chen
Summary: A simulation code for tritium diffusion behavior analysis in FeCrAl cladding is developed based on the COMSOL platform, with further investigation on the effects of different concentrations of tritium and temperature distributions, as well as different coating schemes on tritium resistance.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Chemistry, Applied
Sifan Wang, Qibin Liu, Enpei Cai, Fanghui Mou, An Xue
Summary: A series of (Ba0.98Ca0.02Ti0.94Sn0.04Zr0.02)O(3) ceramics were successfully synthesized by solid-state sintering method, and their phase structure and electric properties were investigated. The results showed that the addition of Y2O3 significantly enhanced the electric properties of the ceramics.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Physical
Yiyang Chen, Peng Xu, Qibin Liu, Dong Yuan, Xiang Long, Shaokuan Zhu
Summary: The use of a porous carbon fiber membrane embedded with cobalt nanoparticles has been shown to effectively address the shuttle effect in lithium-sulfur batteries, improving energy density and suppressing volume changes in sulfur. Experimental results demonstrate that batteries with this structural design exhibit stable performance and have promising potential for practical applications.
Article
Materials Science, Ceramics
Sifan Wang, Fanghui Mou, Qibin Liu
Summary: This work aims to improve the electrical properties of BaTiO3-based ceramics by synthesizing piezoceramics and evaluating their phase structures, surface topographies, and ferroelectric domains. The optimized piezoelectricity is achieved at x = 0.03 mol%, with improved performance attributed to the coexistence of the orthorhombic-tetragonal phase boundary and the reduced energy density of the domain wall. Furthermore, all the ceramics are confirmed to be relaxor ferroelectrics, with the degree of relaxor behavior increasing with the increasing content of Sm2O3.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Zhongwen Hu, Peng Xu, Chi Pang, Qibin Liu, Shaobo Li, Jiangshan Li
Summary: Wire and arc additive manufacturing (WAAM) is a feasible technology for manufacturing large-scale metal structures. However, it is rarely used for high-performance Al-Zn-Mg-Cu aluminum alloy due to its poor machinability and hot cracking sensitivity. In this study, 7075 aluminum wires were used to produce thin-wall block structures using Cold Metal Transfer-WAAM. The microstructure and properties of deposited samples were compared with traditional cast 7075 aluminum alloy. The results show that the microstructure of the deposited samples is mainly composed of fine columnar and equiaxed crystals in the horizontal direction. Most of the grains in the deposition direction layer are coarse equiaxed, with a few slender columnar grains. The precipitation of the second phase, mainly composed of Mg2Si and (Mg (Zn, Cu, Al)(2)) phases, was observed during the preparation process. The deposited samples have lower microhardness and wear resistance but better corrosion resistance than cast 7075 aluminum alloy. The anisotropic microstructure leads to subtle differences in properties with different directions, with the tensile strength in the horizontal direction being better than that in the deposition direction, and the elongation in each direction being higher than 30%. The low dislocation density and increased elongation are caused by the process of dynamic reversion and static recrystallization.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Coatings & Films
Shisong Zheng, Fang Zhou, Shihua Kuang, Wencheng Liu, Qibin Liu
Summary: In this study, high-entropy alloy coatings were successfully fabricated on the surface of high-speed steel using laser cladding technology. The addition of Al2O3 promoted the formation of a eutectic microstructure, with different compositions resulting in hypoeutectic or hypereutectic structures. The phase structure remained unchanged after annealing at temperatures ranging from 750 to 1050 degrees C. The coating exhibited excellent microstructural stability at 750 degrees C, while the hardness and wear resistance decreased at temperatures above 850 degrees C.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Shihua Kuang, Fang Zhou, Wencheng Liu, Qibin Liu
Summary: High-entropy alloy coatings reinforced with Al2O3/MC particles were successfully fabricated using laser cladding technique on M2 high-speed steel. An investigation revealed that increasing Nb content can improve the microstructure and properties of the coatings, resulting in enhanced hardness and wear resistance. The coating with x = 3 exhibited the highest hardness and lowest wear volume loss.
SURFACE ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Kailu Ding, Zonglun Wang, Xianghai Wu, Xiaojuan Shang, Qibin Liu
Summary: In order to extend the service life of the agitator blade, a series of high-entropy alloy (HEA) compositions based on the cluster-plus-glue-atom model are designed and deposited as coatings on 904L stainless steel using the laser cladding technique. The coatings exhibit improved microhardness, wear resistance, corrosion resistance, and erosion properties upon the addition of Ti. Specifically, the [Cr-Fe4Co4Ni4]Cr1.7Ti0.9Mo0.4 coating shows impressive overall performance, with much higher microhardness, lower wear rate, higher impedance, and lower erosion-corrosion volume loss rate compared to the substrate.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Engineering, Manufacturing
Fangping Wang, Yaxiong Guo, Qibin Liu, Xiaojuan Shang
Summary: This study proposes a design strategy that combines the overall valence electron concentration with the calculation of phase diagrams to introduce precipitation strengthening of D0(22) superlattice (gamma'' phase) in additive manufacturing. By designing a Ni2.1CoCrFe0.5Nb0.2 high-entropy alloy and subjecting it to solution and aging treatments, the yield strength and ultimate strength dramatically increased, while maintaining a large tensile elongation. The high strength is attributed to the precipitation strengthening of the gamma'' phase, while the large ductility is primarily due to the evolution of multiple stacking fault structures. This research not only promotes the development of high-performance high-entropy alloys by additive manufacturing, but also provides a pathway for the industrial application of additive manufacturing technology.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Article
Chemistry, Physical
Fangping Wang, Jiawang Wu, Yaxiong Guo, Xiaojuan Shang, Jing Zhang, Qibin Liu
Summary: Two high-entropy-alloy compositions [(Al0.5Ti0.5)-(FeCoNi)12]Cr3 and [Cr-(FeCoNi)12]Cr2.5(Al0.25Ti0.25) were designed and bridges with traditional austenite steels were established. The thermomechanically treated Al0.5Ti0.5 HEA exhibited a uniform distribution of L12 nano-precipitates, resulting in a high ultimate tensile strength of 1356.5 MPa and a suitable ductility of 34.9%. The strengthening of coherent nano-L12 precipitates contributed to the increase in yield strength, while the nano-L12 precipitates with tiny lattice strain and superior strength-ductility combination reduced local stress concentration and ensured ductility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Materials Science, Multidisciplinary
Zhijie Jing, Peng Xu, Qibin Liu, Chuan Yu
Summary: Laser cladding technology has attracted significant attention in metal surface repair and remanufacturing research. However, excessive residual stress poses a major obstacle to its practical application in aerospace, engineering machinery, and other industries. This comprehensive review discusses recent advances in releasing residual stress in laser cladding, including the influence of laser parameters, material characteristics, and matching heat treatment methods. Additionally, a new concept and technique involving phase transformation for residual stress release during the cladding process are presented.
JOURNAL OF LASER APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yufang Lv, Peng Xu, Qibin Liu, Chuan Yu
Summary: Fe-Al intermetallic coatings are synthesized in situ on the surface of aluminum alloys by laser cladding to improve their hardness and wear resistance. The coating exhibits a dendrite, columnar, and equiaxed crystal structure, and is mainly composed of a body-centered cubic solid solution, FeAl phase, and Fe3Al phase. The coating has no pores but microcracks. The average hardness of the coating is 601.54 Hv(0.2), approximately 5.9 times higher than that of the substrate. The coating also shows improved corrosion resistance, with an increased self-corrosion voltage, a reduced self-corrosion current, and an increased protection rate in a 3.5% NaCl solution.
JOURNAL OF LASER APPLICATIONS
(2023)
Article
Chemistry, Physical
Jiaojiao Xia, Peng Xu, Yiyang Chen, Jianlin Li, Long Li, Jiaojing Shao, Chuan Yu
Summary: A flexible carbon nanofiber membrane embedded with Co and CoP nanoparticles was designed as a freestanding cathode for Li-S batteries, which exhibited excellent cycling stability and high capacity retention rate.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Green & Sustainable Science & Technology
Tianhui Luo, Peng Xu, Chang Guo
Summary: Armor-style micro-nanostructures were fabricated on aluminum alloy surfaces using femtosecond laser processing and spray modification techniques, leading to durable and controllable superhydrophobic surfaces. The combination of a hydrophobic nano-silica coating and the laser-processed micro-nano structure resulted in a high contact angle and low slide angle, demonstrating excellent superhydrophobic performance. The treated surface also exhibited improved corrosion resistance and better thermal, mechanical, and chemical stability, presenting a promising solution for surface protection of aluminum alloys.
Article
Materials Science, Multidisciplinary
Yu Zheng, Peng Xu, Long Li, Qibin Liu
Summary: Modification of micro-nano structures on medical implants using a femtosecond laser can enhance cell behavior, bonding strength, and osseointegration. However, the compromise between biocompatibility and structural stability is a challenge. In this study, a Ti32$5Nb alloy laser cladding coating was created on a Ti6Al4V substrate, followed by the formation of an armor-like micro-nano structure with improved properties. The results show enhanced hardness, wear resistance, and corrosion resistance of the coatings. Additionally, the surface structure promotes cell migration and proliferation, and the deposition of hydroxyapatite enhances biocompatibility.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yu Zheng, Peng Xu
Summary: As a beta phase transformation promoting element of titanium alloy, Nb element can induce different phase transformations of the alloy, improving the comprehensive properties of the alloy. However, the research on the effect of Nb content on the properties of TiNb alloy coating during laser cladding is not comprehensive. TixNb alloy coatings with different Nb contents were prepared by laser cladding technology, and their mechanical properties, corrosion resistance, and biocompatibility were analyzed. The results showed that the Nb element promotes the precipitation of different phase components in the phase transformation-induced coating of titanium alloy, and with the increase in Nb content, the coating exhibits better corrosion resistance. The TiNb alloy coating also demonstrated excellent biocompatibility compared to the TC4 substrate, suggesting its potential in the field of biological implantation.
