Article
Materials Science, Multidisciplinary
Yijie Huang, Xiangdong Gao, Bo Ma, Yanxi Zhang
Summary: Laser welding experiments were conducted on amorphous thermoplastic polymer (PMMA) and 304 austenitic stainless steel plates to explore the influence of laser welding process parameters on plastic-metal joints. By analyzing temperature measurements, microstructure morphology observations, and mechanical characterization of the joints, it was found that different welding conditions resulted in varying weld morphology and shear stress, leading to the identification of the optimal welding conditions for stable hybrid joints.
Article
Materials Science, Multidisciplinary
Kota Kadoi, Mari Kogure, Hiroshige Inoue
Summary: The effect of ferrite morphology on the pitting corrosion resistance of austenitic stainless steel weld metals was studied. Pitting corrosion mainly occurred at the ferrite/austenite interface, especially at the vermicular ferrite/austenite interface. However, less pitting corrosion was observed at the lacy ferrite/austenite interface due to the establishment of a Kurdjumov-Sachs orientation relationship, which resulted in lower precipitation of Cr carbide and reduced likelihood of pitting corrosion initiation.
Article
Nanoscience & Nanotechnology
Nan Li, Qiang Lang, Hongyang Wang, Gang Song, Liming Liu
Summary: Coaxial dual-beam laser welding technology and Mg-Gd-Y-Zr alloy were utilized to achieve a lap joint of TC4 titanium alloy and QP980 steel, with a maximum tensile load of 3000 N/cm. The bonding mechanism of the Mg/steel interface and Mg/Ti interface was investigated. It was found that compounds formed between Mg and Gd, as well as Y and Fe, at the respective interfaces. The Mg/steel interface exhibited a connection between the lattices of the two compounds through shared Gd and Y atoms, with BCC-structured Mg24(Gd, Y)5 compound acting as the heterogeneous nucleation core of alpha-Mg. At the Mg/Ti interface, diffusion of Zr, Y, and Gd atoms into Ti formed a 35 nm thick diffusion layer, reducing the mismatch between the (100)BCC of beta-Ti and the (1010)HCP of alpha-Mg from 15.95% to 0.25%, enabling the joining of the Mg/Ti interface.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Yao Chen, Yonghong Gao, Chuanxiang Guo, Yanping Guo, Zhijun Guo, Yingbin Liu, Tiansheng Liu
Summary: Firstly, steel fiber-reinforced steel-aluminum composite plates were prepared using the explosion-welding method. Secondly, the effect of introducing steel fibers to a vortex region at the bonding interface of the composite plate was investigated using the smooth particle hydrodynamic method. Finally, it was concluded that the high temperature, high pressure, and high strain rate environment in the vortex region led to the formation of a brittle intermetallic compound FeAl, resulting in cracks, holes, and pores.
Article
Nanoscience & Nanotechnology
Xiaohong Zhan, Jiahao Zhang, Jianfeng Wang, Leilei Wang, Xiang Li, Yanqiu Zhao
Summary: This paper investigates a beam shaping strategy that combines fiber laser and diode laser in the laser welding of austenitic stainless steel. The effects of diode laser power on microstructures and mechanical properties are studied systematically. The results show that the fiber-diode hybrid heat source can effectively improve the welding process and enhance the mechanical properties and surface quality of the joint.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Optics
Wei Cheng, Xiaolei Zhang, Jinzhong Lu, Fengze Dai, Kaiyu Luo
Summary: The research found that laser oscillation welding can reduce spattering during the welding process, leading to a better macroscopic morphology, but slightly lower shear and tensile strengths in the welded joint.
Article
Optics
Jilin Xu, Ping Zou, Xue Wang, Anqi Wang, Lu Liu
Summary: Gas shielding is crucial in enhancing the quality of laser polishing. The processing effects of laser polishing with chamber and nozzle gas shielding were compared and analyzed. The influence of flow rate on the surface roughness of the polished workpiece was examined, and the optimal flow rate (Q = 5 L/min) was determined. Further research on nozzle gas shielding laser polishing explored the effects of laser power and scanning speed on surface roughness, demonstrating wider application prospects.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jie Ning, Suck-Joo Na, Chen-hong Wang, Lin-Jie Zhang
Summary: High-nitrogen austenitic stainless steel offers superior properties, but welding may lead to nitrogen-related issues. By comparing welded joints, it was found that laser-MIG hybrid welding exhibited higher tensile strength and impact absorption energy due to solid solution strengthening and improved microstructure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nuclear Science & Technology
Chao Fang, Jing Wei, Jin Liu
Summary: The study revealed high solidification cracking sensitivity in NGLW of ITER grade 316LN, with cracks mostly occurring in the centerline of build-up weld and being able to be healed by subsequent layer welding. Other laser welding processes like ALW, double-sided NGLW, and NGPLW showed better cracking resistance due to various factors such as stress distribution and microstructural characteristics.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Mechanics
Hongbo Xia, Yunwu Ma, Chuantong Chen, Jianhui Su, Chengsong Zhang, Caiwang Tan, Liqun Li, Peihao Geng, Ninshu Ma
Summary: In this study, DP590 steel and CFRP were successfully joined by laser welding, and experiments and simulations were conducted to investigate the influence of laser power on the joint characteristics, bonding mechanism, and fracture behavior. The results showed that the melting width and depth of CFRP increased with increasing laser power. Different fracture modes were observed at different laser powers, and chemical bonds formed at the interface were beneficial for improving fracture load.
COMPOSITE STRUCTURES
(2022)
Article
Nanoscience & Nanotechnology
Huimin Wang, Kangnian Wang, Wenyue Zheng
Summary: This study revealed the microstructure complexities of the bonding interface at micro/nano-scale for laser impact welding (LIW) for the first time. Various structures, such as smooth interface, intrusion structure, nanocrystal structure, diffusion structure, and porous structure, were observed along the Al-Ti interface. These findings provide insights into the bonding mechanisms of LIW and contribute to precise control of the welding process.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Multidisciplinary
Fabio Giudice, Andrea Sili
Summary: The proposed modeling of the thermal field allows evaluation of fusion zone composition and solidification mode to aid in selecting optimal welding parameters and preventing hot cracking. An analytical method is used to predict weld metal microstructure based on the thermal fields generated during laser beam travel on thick plates, focusing on avoiding hot cracking by predicting molten zone microstructure.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Dongshuai Wang, Yuchen Dong, Liming Liu, Meili Zhu, Hongyang Wang, Chunbai Liu
Summary: The microstructure and properties of aluminum-steel dissimilar metal riveting-welding joints obtained by pulse laser and laser-arc hybrid welding methods were investigated. The study found differences in the maximum tensile shear load and microstructure of joints produced by different welding methods.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
R. Paventhan, D. Thirumalaikumarasamy, Venkata Charan Kantumuchu, Omar Shabbir Ahmed, Mohamed Abbas, Ahmad Aziz Alahmadi, Mamdooh Alwetaishi, Ali Nasser Alzaed, Chidambaram Seshadri Ramachandran
Summary: This study optimized the process conditions of friction welding to obtain the highest tensile strength of the joint at 489 MPa. The formation of intermetallic compounds at the interface was identified.
Article
Nanoscience & Nanotechnology
Ceyhun Kose, Ceyhun Topal
Summary: In this study, laser beam welding technique was used to join AISI 2507 super duplex/AISI 317L austenitic stainless steels. The effects of heat input and post weld heat treatment (PWHT) on surface, texture, microstructure and mechanical properties were investigated. The results showed that the weld metal exhibited a duplex microstructure, while ferrite and austenite grains were detected in the base metal. The increase in heat input led to a decrease in tensile strength, hardness, and bending force, but an increase in toughness values in the welded samples. PWHT resulted in a reduction in tensile strength and hardness, as well as changes in the microstructure and orientation relationships.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Kangda Hao, Ming Gao, Chen Zhang, Run Wu, Xiaoyan Zeng
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Engineering, Industrial
Kangda Hao, Ming Gao, Chen Zhang, Run Wu, Xiaoyan Zeng
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Kangda Hao, Helzang Wang, Ming Gao, Run Wu, Xiaoyan Zeng
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2019)
Article
Engineering, Manufacturing
Ming Gao, Hekang Wang, Kangda Hao, Hongyu Mu, Xiaoyan Zeng
JOURNAL OF MANUFACTURING PROCESSES
(2019)
Article
Materials Science, Multidisciplinary
Kangda Hao, Ming Gao, Run Wu
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2020)
Article
Engineering, Industrial
Kangda Hao, Ming Gao, Run Wu, Xiaoyan Zeng
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Kangda Hao, Ming Gao
Summary: The study on the laser oscillating welding of Q235 steel revealed that the appropriate oscillating parameters can effectively inhibit pore formation, regulate the microstructure, and improve the mechanical properties of the weld.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Optics
Ming Gao, Wei Liao, Cong Chen
Summary: This study investigates the effect of oscillating laser beam on the bonding strength between plastics and metals through lap welds, finding that the oscillating frequency has the most significant impact on the area ratio of PMZ and the shearing strength.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Cong Chen, Xuni Yin, Wei Liao, Yunzhong Xiang, Ming Gao, Yi Zhang
Summary: Increasing the laser scanning frequency and amplitude can improve the proportion of equiaxed grains and reduce the average diameter in the weld, leading to increased elongation. The scanning laser helps to enhance the strength of the weld fusion zone and provides a new way to improve the strength, safety, and service life of new energy power batteries through even distribution of elements and strengthening phases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Mechanical
Kai Song, Lei Zhao, Lianyong Xu, Yongdian Han, Kangda Hao
Summary: Creep-fatigue interaction plays a crucial role in the failure of high-temperature components. This study aimed to predict the creep-fatigue life and modify the existing model to make it applicable to a wide range of materials and testing conditions. The modified model showed reasonable predictions within a scatter band of ±1.5, based on experimental data of different materials.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Mechanical
Kai Song, Kaimeng Wang, Lei Zhao, Lianyong Xu, Yongdian Han, Kangda Hao
Summary: In this study, the stress-strain responses of G115 martensitic steel, Inconel alloy 750H, and 316H austenitic steel at elevated temperatures were investigated via low cycle fatigue tests. The effects of microstructure on stress-strain responses were discussed, and a unified elastic-plastic framework was established. The results showed good consistencies between experimental and predicted results, indicating the strong capability of the model to integrate different behaviors into a constitutive model.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Nanoscience & Nanotechnology
Wei Chen, Lianyong Xu, Kangda Hao, Yongdian Han, Lei Zhao, Hongyang Jing
Summary: Directed energy deposition was used to fabricate 15-5PH/WC composites with tailored reinforcement architecture. The addition of WC particles resulted in a synergistic enhancement of strength and ductility due to multiple factors.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Kai Song, Kaimeng Wang, Libin Zhang, Lei Zhao, Lianyong Xu, Yongdian Han, Kangda Hao
Summary: A novel model for revealing the low cycle fatigue (LCF) fracture mechanism was established using molecular dynamics, extended finite element method, and representative volume element technology. The model was able to accurately simulate LCF crack formation and propagation, and was validated using microstructural fractography and 3D X-ray computed tomography. The proposed model demonstrated potential in understanding the correlation between microstructure and LCF fracture mechanism, and identified different formation mechanisms for secondary cracks.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)