Article
Chemistry, Physical
Juan Ignacio Ahuir-Torres, Gregory J. Gibbons, Geoff West, Amit Das, Hiren R. Kotadia
Summary: Metal additive manufacturing (AM) is an emerging technology capable of manufacturing complex shaped components. Considering the corrosion behavior of AM fabricated parts is important for safety critical applications. By studying the microstructures and corrosion behaviors of AM fabricated Scalmalloy and commercial Al-Mg alloy, it was found that Scalmalloy exhibited better corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Siyu Zhang, Qiang Zhang, Min Zheng, Yunlong Hu, Shang Sui, Jing Chen, Xin Lin
Summary: Increasing powder feed rate can effectively promote the columnar to equiaxed transition of Ti5Al2Sn2Zr4Mo4Cr titanium alloy during the LSF process, but excessively high powder feed rate does not further refine beta grains, especially near the fusion lines.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Manufacturing
G. Del Guercio, D. G. McCartney, N. T. Aboulkhair, S. Robertson, R. Maclachlan, C. Tuck, M. Simonelli
Summary: This study provides a detailed investigation of crack formation in the AlCuMg alloy AA2024 during laser powder bed fusion (L-PBF) process. Through microstructural characterization, hot cracks and solid state cracks were differentiated and a modeling approach was proposed to predict the susceptibility of hot cracks based on solidification velocities. The observation of cracks associated with microporosity offers new insights into the complex problem of hot tearing during L-PBF.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Ton Bor, Marijn de Leede, Freek Deunk, Jesper Lind, Wout Lievestro, Henk-Jan Smit, Rob Aries, Vishal Dolas, Nick Helthuis, Martin Luckabauer, Remko Akkerman
Summary: The Friction Screw Extrusion Additive Manufacturing (FSEAM) process is a newly created process for additive manufacturing of low weight-high strength aluminum and magnesium alloys in the solid state. The study focused on the influence of the feed ratio on the quality, microstructure and mechanical properties of the fabricated builds. Solid builds free from defects were achieved at higher feed ratios, while lower feed ratios resulted in fabrication defects and reduced elongation values.
ADDITIVE MANUFACTURING
(2023)
Article
Nanoscience & Nanotechnology
Yanfang Wang, Xin Lin, Yufan Zhao, Qijuan Dong, Shuoqing Shi, Xuehao Gao, Haiou Yang, Weidong Huang
Summary: The effect of direct aging treatment on the microstructure and strengthening mechanisms of Zr-modified Al-Cu-Mg alloys fabricated by SLM was analyzed in this study. After direct aging treatment, the fine alpha-Al grains were maintained and the S'-Al2CuMg precipitates dissolved. The precipitation of secondary Al3Zr-L12 led to a larger increase in precipitation strengthening compared to grain boundary strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Engineering, Mechanical
Santiago Aguado-Montero, Carlos Navarro, Jesus Vazquez, Fernando Lasagni, Sebastian Slawik, Jaime Dominguez
Summary: Additive manufacturing (AM) of metallic parts is a new manufacturing procedure that has been applied in various industries. However, AM parts often have internal defects and surface roughness, resulting in lower fatigue strength compared to materials produced by traditional processes. This study investigated different surface treatments, including shot peening, laser peening, and shot peening plus chemical assisted surface enhancement, to improve the fatigue strength of AM parts. The results showed that laser peening produced the best results, followed by shot peening plus CASE and shot peening.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Nanoscience & Nanotechnology
Feipeng Yang, Jianying Wang, Tao Wen, Lei Zhang, Xixi Dong, Dong Qiu, Hailin Yang, Shouxun Ji
Summary: The AM aluminium alloy Al5Mg3Zn2Si developed in this work exhibits high strength, ductility, and excellent mechanical properties without the addition of costly alloying elements. With an optimized relative density and refined microstructure, it has great potential for automotive and aerospace applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Kyle Tsaknopoulos, Jack Grubbs, Bryer C. Sousa, Matthew Siopis, Aaron Nardi, Danielle L. Cote
Summary: Metal additive manufacturing is a constantly developing approach. This study investigates the use of alloys designed for AM in solid-state processing and proposes methods to improve processing performance through heat treatment and parameter optimization.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Rong Xu, Ruidi Li, Tiechui Yuan, Hongbin Zhu, Minbo Wang, Jinfeng Li, Wen Zhang, Peng Cao
Summary: A Sc-free and high-plasticity Al-Mg-Zr alloy was successfully densified using laser powder bed fusion. The alloy exhibited a bimodal grain structure with L12-Al3Zr particles, contributing to its excellent strength-ductility trade-off. The combination of solid solution strengthening, grain boundary strengthening, nanoparticle strengthening, and the 9R phase resulted in improved mechanical properties. The alloy also demonstrated low-temperature dynamic precipitation, deformation-induced hardening, and enhanced precipitation strengthening. Overall, this alloy presents a promising solution for economical and large-scale additive manufacturing.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Optics
Yongda Song, Chengwei Yuan, Wenhao Huang, Yun Zhao, Yazhou Jia
Summary: In order to meet the requirements of aerospace components integration and lightweight, the forming and manufacturing technology for lightweight materials needs to be improved. This paper proposes the use of laser oscillation to reduce workpiece porosity in laser fuse material increasing technology. The research compares and analyzes the experiment and simulation results of laser swing fuse material increasing under different process parameters, and summarizes the influence of swing parameters on laser fuse forming.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Konrad Kosiba, Denys Y. Kononenko, Dmitry Chernyavsky, Liang Deng, Jozef Bednarcik, Junhee Han, Jeroen van den Brink, Hwi Jun Kim, Sergio Scudino
Summary: Due to layer-by-layer processing, laser powder bed fusion (LPBF) can overcome the size limitation of bulk metallic glasses (BMGs) caused by high cooling rates. However, fabricating amorphous and highly dense parts via LPBF is challenging because the processing parameters affect both requirements in a contrasting manner. In this study, specimens of the glass-forming Zr52.5Cu17.9Ni14.6Al10Ti5 alloy were fabricated using LPBF under varying processing conditions. Processing maps of amorphicity and density were provided and evaluated in terms of porosity, structural relaxation, and crystallization. Optimal processing conditions for maximizing density and amorphicity were identified. The dataset helps quantify the correlation between relative density, amorphicity, volumetric energy density, and normalized enthalpy criteria. Pearson and Spearman correlation analyses revealed an equally strong dependence between these criteria and relative density, and an inverse moderate dependence with amorphicity. A modified enthalpy criterion, which correlates strongest with density among the non-dimensional parameters, was derived based on the results.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jingwei Liang, Zhenglong Lei, Yanbin Chen, Weijie Fu, Xi Chen, Shengchong Ma
Summary: This study found that the addition of rare earth element Y can effectively eliminate the hot cracks in LPBF processed ZK60 components. The cracks were mainly caused by the low-melting eutectic phase Mg7Zn3 at the grain boundaries. The presence of the I-phase and grain refinement played a key role in the elimination of cracks.
Article
Materials Science, Multidisciplinary
Abhishek Tiwari, Gaurav Singh, Rengaswamy Jayaganthan
Summary: The corrosion behavior of AlSi10Mg alloy produced by selective laser melting (SLM) in different atmospheres, argon and nitrogen, was compared to that of cast AlSi10Mg alloy. The electrochemical behavior of SLMed AlSi10Mg alloy in 0.1 M NaCl solution was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), and the degradation features were analyzed through SEM. The corrosion resistance of AlSi10Mg produced by selective laser melting was found to be 2-3 times higher than that of cast AlSi10Mg, which can be attributed to the faster cooling rate during solidification.
Article
Materials Science, Multidisciplinary
Camille Pauzon, Ahmad Raza, Eduard Hryha, Pierre Foret
Summary: This study focused on the characterization of powder degradation during L-PBF of Alloy 718, revealing the significant impact of surface-to-volume ratio of built components on powder quality and oxide formation.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Srinivas Aditya Mantri, Sriswaroop Dasari, Abhishek Sharma, Talukder Alam, Mangesh V. Pantawane, Mayur Pole, Shashank Sharma, Narendra B. Dahotre, Rajarshi Banerjee, Srikumar Banerjee
Summary: Laser surface engineering has been used to simulate microstructural evolution during laser-based additive manufacturing of Alloy 718. The micro-segregation of alloying elements in the fusion zone has a significant impact on local precipitation behavior. The dendritic structure formed by rapid melting and solidification exhibits three distinct zones and contains various types of precipitates within the austenite matrix.
Article
Engineering, Manufacturing
Haixia Cheng, Bowen Xu, Jianfeng Zhao, Mingbo Qiu, Guibin Lou, Fei Wang, Ya Chen, Lida Shen, Youwen Yang
Summary: This study investigated jet electrochemical machining and jet electrodeposition combined processing techniques for treating the substrate surface of SLM-formed parts. The results showed that electrochemical machining effectively reduced surface defects on SLM parts, forming a uniform microporous structure that improved the quality and corrosion resistance of the nickel coating on the surface.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2022)
Article
Chemistry, Multidisciplinary
Yu Zhang, Shujun Feng, Getian Hu, Tianliang Fang, Deqiao Xie, Qiangbing Lu, Yurui Xu, Lida Shen, Xinghai Ning
Summary: The adenovirus-mimicking nanomachine (AMN) developed in this study targets tumor cells through enhanced photothermal effect and increased GOx activity, achieving synergistic anticancer effects. Additionally, AMN selectively accumulates in tumors in vivo and has good imaging capability, providing a new approach for tumor detection.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Ceramics
Chen Jiao, Zhipeng Chen, Qiuwei Zhang, Jinghui Wang, Deqiao Xie, Kai Zhou, Youwen Yang, Zongjun Tian, Lida Shen, Jianfeng Zhao
Summary: This study proposes a combined method of ceramic digital light processing (DLP) and metal infiltration to fabricate Al2O3/Al composite structures with controllable ceramic skeletons. The results show that the composite structures have good interfacial, compressive, and impact resistance properties.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Junwei Xu, Ya Chen, Lida Shen, Jiantao Zhao, Guibin Lou, Dazhi Huang, Youwen Yang
Summary: A method for fabricating superhydrophobic stainless-steel meshes by magnetic field-assisted jet electro-deposition is proposed. The prepared Ni/Nip-coated meshes exhibit superhydrophobicity and superoleophilicity, allowing for high-efficiency separation of oil-water mixtures and stable reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Nanoscience & Nanotechnology
Dezhi Bai, Fuxi Liu, Deqiao Xie, Fei Lv, Lida Shen, Zongjun Tian
Summary: This paper presents a method for manufacturing flexible strain sensors using 3D printing technology. The sensors exhibit excellent performance and different response signals to different types of loads. Mechanical hysteresis is observed under cyclic loading, and it becomes more pronounced with increasing strain amplitude.
Article
Materials Science, Multidisciplinary
Weiping Deng, Deqiao Xie, Fuxi Liu, Lida Shen, Zongjun Tian
Summary: This research introduces a new type of composite absorbers with different cores and shells for testing. The results show that the samples with semielliptical cross section have the lowest maximum force, and the maximum force is higher in the GFRP core than in the LPDE core.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2023)
Article
Materials Science, Coatings & Films
Ya Chen, Junwei Xu, Lida Shen, Jiantao Zhao, Jinsong Chen, Youwen Yang, Lin Wang, Jianfeng Zhao, Changjiang Wang
Summary: By combining magnetic field induced jet electrodeposition and laser surface modification, this study achieved green preparation of wettability contrast surfaces. The coatings exhibited superhydrophobicity after natural aging and different laser fluences resulted in different hydrophilic or hydrophobic patterns.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Ran Zhang, Qinyi Wang, Ya Chen, Chen Jiao, Fuxi Liu, Junwei Xu, Qiuwei Zhang, Jiantao Zhao, Lida Shen, Changjiang Wang
Summary: In this study, dicopper hydroxide phosphate was added to resin to prepare resin sheets. The copper base points on the resin surface were activated by laser and silver electrodes on the detection chips effectively distinguished glucose solutions of different concentrations. A novel detection kit with a three-electrode chip was designed for future rapid health testing.
Article
Chemistry, Multidisciplinary
Yulong Yang, Meng Zhao, Hong Wang, Kai Zhou, Yangdong He, Yuyi Mao, Deqiao Xie, Fei Lv, Lida Shen
Summary: Laser remelting can reduce porosity defects in Ti-6Al-4V alloy, and annealing treatments and solution-aging treatments can affect fatigue life and fatigue crack growth behavior. The results show that microstructure influences fatigue life but has little effect on crack growth rate.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Biomedical
Long Chao, Yangdong He, Jiasen Gu, Deqiao Xie, Youwen Yang, Lida Shen, Guofeng Wu, Lin Wang, Zongjun Tian
Summary: A method for the design of trabecular-like porous structure (TLPS) with mixed porosity is proposed. The morphology and density of internal porous structures can be adjusted to meet the mechanical and permeability requirements of natural bone. TLPS scaffolds were prepared and analyzed, and the results showed better mechanical properties and permeability than natural bone. TLPS effectively improves the success rate of bone implantation.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Biology
Zifan Zhang, Deqiao Xie, Fei Lv, Ruikang Liu, Youwen Yang, Lin Wang, Guofeng Wu, Changjiang Wang, Lida Shen, Zongjun Tian
Summary: Recently, laser powder bed fusion (LPBF) has been shown to have great potential in advanced manufacturing. However, the rapid melting and re-solidification of the molten pool in LPBF causes distortion in parts, especially thin-walled parts. In this study, a genetic algorithm (GA) and backpropagation (BP) network were used to optimize the geometric compensation of Ti6Al4V thin-walled parts fabricated by LPBF. The GA-BP network method significantly reduced distortion and improved time and cost efficiencies.
COMPUTERS IN BIOLOGY AND MEDICINE
(2023)
Article
Engineering, Manufacturing
Wei Jiang, Huigui Li, Yuanlong Chen, Cheng Fang, Liangcheng Sheng, Ya Chen, Lida Shen, Xiaoqing Huang, Yuanxia Lao
Summary: Jet electrodeposition with high current density allows for rapid deposition, but suffers from tip discharge which affects coating surface uniformity and flatness. This study utilized scanning jet electrodeposition to optimize tip discharge and enhance the properties of Ni-Co alloy coatings using nano-CeO2/NiP mixed particles. The addition of these nanoparticles improved coating morphology, microhardness, adhesion, and corrosion resistance. These improvements indicate that nano-mixed particles have the potential to enhance the mechanical properties and corrosion resistance of Ni-Co alloy coatings in scanning jet electrodeposition.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2023)
Article
Nanoscience & Nanotechnology
Fuxi Liu, Deqiao Xie, Fei Lv, Lida Shen, Zongjun Tian, Jianfeng Zhao
Summary: This study utilizes digital light processing (DLP) to prepare flexible sensors with pore structures by dispersing fillers in a light-sensitive resin. Results demonstrate that the 1.2 wt% MWCNTs-GN/TPU material exhibits excellent sensing performance, with higher sensitivity and suitability for human body. This method provides new ideas for rapid formation of flexible sensors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Aerospace
Qian Li, Aihong Ji, Huan Shen, Renshu Li, Kun Liu, Xiangming Zheng, Lida Shen, Qingfei Han
Summary: The design of a flapping-wing aircraft is optimized by changing wing parameters such as vein layout, aspect ratio, surface area, and leading-edge-rod flexibility. The results show that aspect ratio and leading-edge-rod flexibility significantly impact the lift generated by the aircraft. The optimal wing design is successfully validated through flight testing, demonstrating the potential for autonomous flight.
INTERNATIONAL JOURNAL OF AERONAUTICAL AND SPACE SCIENCES
(2022)
Article
Engineering, Biomedical
Guibin Lou, Ya Chen, Junwei Xu, Yingjuan Qian, Haixia Cheng, Zhen Wei, Youwen Yang, Lida Shen, Cijun Shuai
Summary: A new method of preparing graphene oxide-loaded nickel (GNC) with excellent antibacterial property was proposed in this paper. The antibacterial performance of GNC was proven to be due to the synergistic effect of nickel ions and graphene oxide.
INTERNATIONAL JOURNAL OF BIOPRINTING
(2022)
