Article
Engineering, Manufacturing
Yan-Le Li, Zi-Jian Wang, Wei-Dong Zhai, Zi-Nan Cheng, Fang-Yi Li, Xiao-Qiang Li
Summary: This study investigated the effects of ultrasonic vibration on incremental sheet forming, revealing that it can reduce surface hardness, uniform residual stress and thickness distribution, and improve forming limit. The findings lay the foundation for better integration of ultrasonic vibration system into the incremental sheet forming process.
ADVANCES IN MANUFACTURING
(2021)
Article
Nanoscience & Nanotechnology
Yang Liu, Chunju Wang, Rengui Bi
Summary: The softening effect induced by ultrasonic vibration has been widely studied, but little attention has been given to the residual effect and its micro-mechanism. In this study, ultrasonic vibration assisted micro-tension experiments were conducted on T2 copper foil to investigate the acoustic residual softening effect. It was found that the acoustic residual softening is more closely related to the duration of ultrasonic vibration rather than its amplitude. Microstructure examinations showed that certain microstructural changes, such as a decrease in low angle grain boundary fraction and dislocation density, contribute to the reduction in deformation resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Guangda Shao, Hongwei Li, Xin Zhang, Jinchao Zou, Zhiquan Huang, Mei Zhan
Summary: This article introduces a coupling model of the interaction between the ultrasonic field and the deformation field in the ultrasonic vibration-assisted (UVA) forming process. Through experiments and simulation analysis, the non-uniform distribution of the ultrasonic field and its impact on structural deformation during UVA forming are revealed.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Engineering, Manufacturing
Ashish Gohil, Bharat Modi, Kaushik Patel
Summary: In recent years, ultrasonic vibration-assisted single-point incremental forming has gained attention in metal forming research. However, the underlying mechanism and the effect of process variables on formability are not fully established. This study investigates the effect of vibration amplitude, forming feed, and step-depth on formability through a groove test on AA3003 aluminum sheet. The FFL for the SPIF process is proposed based on thickness strain from tensile testing, and critical values for ultrasonic vibration amplitude and intensity are identified to determine the zones of ultrasonic softening and hardening.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Automation & Control Systems
Liangchi Zhang, Chuhan Wu, Hossein Sedaghat
Summary: This paper presents a thorough investigation on incremental sheet metal forming assisted by ultrasonic vibration. Utilizing a new acoustoplasticity constitutive model, the study conducted extensive numerical analyses and experimental investigations to examine the effects of critical parameters on forming force, sheet thickness reduction, and springback. The models were found to accurately predict the sheet metal forming process under ultrasonic vibration, with potential to advance ultrasonic vibration-assisted forming techniques.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Industrial
Yuhui Zhao, Jiqiang Zhai, Yanjin Guan, Fengjiao Chen, Ya Liu, Yi Li, Jun Lin
Summary: This paper investigates the microscopic mechanism of ultrasonic vibration on metal deformation through molecular dynamics simulation. The research finds that ultrasonic vibration increases the atomic kinetic energy and promotes the generation and motion of dislocations, resulting in a reduction of hindrance to crystal sliding. Different ultrasonic parameters have different effects on the deformation behaviors of copper.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Zongxia Fu, Guofu Gao, Yi Wang, Deyu Wang, Daohui Xiang, Bo Zhao
Summary: In this research, a ultrasonic vibration tension device was designed to investigate the mechanical properties and rheological behavior of Ti3Al under ultrasonic vibration-assisted tension (UVAT). The results indicated that Ti3Al exhibited obvious acoustic softening after introducing ultrasonic energy, and the softening degree was positively correlated with amplitude. There was a competitive relationship between the acoustic softening and acoustic residual hardening effects.
MATERIALS & DESIGN
(2022)
Article
Engineering, Industrial
Zhenwu Ma, Jiawei Ye, Quanwei Ma, Haidong He, Feng Chen, Yuanjing Zhang, Chunju Wang
Summary: This study investigates the mechanism of ultrasonic vibration on the tensile deformation behavior of pure titanium foil using a developed ultrasonic-assisted tensile forming platform. The results show that the energy of ultrasonic vibration is mainly consumed by acoustic softening and mechanical vibration. Increasing the ultrasonic amplitude leads to a slight increase in the percentage of acoustic softening energy but a sharp decrease in elongation when the percentage of grain boundary region is below a critical value. The acoustic softening effect promotes the dispersion of local concentrated deformation and makes the deformation more uniform. Mechanical vibration accelerates the formation and propagation of microcracks, resulting in brittle fracture characteristics. Grain refinement is an effective method to enhance the acoustic softening effect during the tensile deformation process of foils.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Xinwei Wang, Chunju Wang, Yang Liu, Chen Liu, Zhenlong Wang, Bin Guo, Debin Shan
Summary: In this study, a mechanism was proposed suggesting heterogeneous changes in athermal dislocation dynamics at the microstructure level during ultrasonic vibration-assisted deformation. A model was developed to explain the acoustic softening effect on metals during plastic deformation by incorporating a power function of acoustic energy density into dislocation ejection work. Experimental results from UVA micro-tension tests on pure titanium specimens showed that ultrasonic vibration decreased the Hall-Petch slope, with the effect increasing with plastic deformation.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Materials Science, Multidisciplinary
Shahid Ghafoor, Yanle Li, Ganglin Zhao, Jinhui Li, Irfan Ullah, Fangyi Li
Summary: This paper investigates the effect of ultrasonic vibrations on forming forces, thickness distribution, and stress-strain distribution in multi-stage sheet forming. The results show that ultrasonic vibration effectively reduces forming forces, improves plastic deformation, and optimizes stress distribution. It is discovered that by applying ultrasonic vibration at the appropriate forming stages, formability and thickness distribution can be successfully improved.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Guangda Shao, Hongwei Li, Xin Zhang, Mei Zhan, Zhiyu Xiang
Summary: This study investigates the deformation characteristics and mechanism of Ni-based superalloy thin-walled sheet under ultrasonic vibration-assisted (UVA) forming. Experimental results show that ultrasonic vibration reduces the stress response and facilitates grain rotation and dislocation slip, thereby promoting plastic deformation. A new perspective of the acoustic softening mechanism considering grain rotation and dislocation slip is proposed based on the experimental results.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Wenbo Bie, Bo Zhao, Guofu Gao, Fan Chen, Jiangwei Jin
Summary: This study used ultrasonic vibration-assisted forming grinding gear to improve the gear processing technology and found that it significantly improved processing efficiency. The study analyzed the effects of different grinding parameters on grinding force, temperature, stress, roughness, and morphology.
Article
Nanoscience & Nanotechnology
Randy Cheng, Scott Rose, Alan Taub
Summary: Acoustic softening is the phenomenon where metals exhibit lower flow stress at ultrasonic frequencies. Two areas that need further analysis are the wide range of reported softening responses for the same alloy and the use of coefficients and factors in modeling the phenomenon in complex forming processes. This study investigates the relationship between specimen volume and softening response in ultrasonic assisted compression tests, finding an inverse relationship and introducing the amplitude strain parameter to account for changes in specimen dimensions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Automation & Control Systems
Zimo Song, Haoran Zhang, Xingrong Chu, Zhiyong Zhao, Jun Gao
Summary: In this study, electric pulse and ultrasonic vibration were used in the incremental sheet forming (ISF) process of magnesium alloys to improve surface quality and reduce forming force. The study found that a composite energy field can improve surface quality and decrease forming force, with ultrasonic vibration having a more significant effect on surface quality and causing surface gully rearrangement.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jiqiang Zhai, Yanjin Guan, Ya Liu, Fengjiao Chen, Jun Lin
Summary: This paper proposed a new finite element method to simulate ultrasonic effects in metal forming and analyzed the volume effect and surface effect quantitatively in upsetting and U-groove extrusion. The study found that the ultrasonic effects were significantly different in upsetting and extrusion. The acoustic softening effect and surface effect played key roles in the material flow during extrusion. It is suggested that this method accurately reflects the deformation behavior of materials with ultrasonic assistance, and is valuable for process design and in-depth study of the microscopic mechanism in ultrasonic forming.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
C. J. Wang, Y. Liu, B. Guo, D. B. Shan, B. Zhang
MATERIALS & DESIGN
(2016)
Article
Materials Science, Multidisciplinary
C. J. Wang, Y. Liu, B. Zhang, D. B. Shan, B. Guo
Article
Engineering, Electrical & Electronic
Chunju Wang, Bin Guo, Debin Shan, Hua Zhang
INTEGRATED FERROELECTRICS
(2012)
Article
Automation & Control Systems
C. J. Wang, L. D. Cheng, Y. Liu, H. Zhang, Y. Wang, D. B. Shan, B. Guo
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2019)
Article
Engineering, Industrial
Chunju Wang, Bin Guo, Debin Shan, Xinmei Bai
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2013)
Article
Materials Science, Multidisciplinary
C. J. Wang, B. Guo, D. B. Shan, Y. Z. Wang, J. Zhou, F. Gong
MATERIALS RESEARCH INNOVATIONS
(2011)
Article
Materials Science, Multidisciplinary
Chuan-Jie Wang, Chun-Ju Wang, Bin Guo, De-Bin Shan, Yan-Yan Chang
Article
Materials Science, Multidisciplinary
Chunju Wang, Debin Shan, Bin Guo, Jie Xu, Hua Zhang
Article
Chemistry, Physical
Shaoxi Xue, Chunju Wang, Pengyu Chen, Zhenhai Xu, Lidong Cheng, Bin Guo, Debin Shan
Article
Chemistry, Physical
Xinwei Wang, Jie Xu, Chunju Wang, Antonio J. Sanchez Egea, Jianwei Li, Chen Liu, Zhenlong Wang, Tiejun Zhang, Bin Guo, Jian Cao
Article
Chemistry, Physical
Chunju Wang, Weiwei Zhang, Zhenwu Ma
Summary: This study used digital image correlation method to investigate the influence of size effect on the elongation of Ti-2.5Al-1.5Mn foils, and found that the elongation of the foils increased with the decrease in t/d value, while concentrated deformation also increased and affected the elongation trend of the foils.
Article
Mathematics, Interdisciplinary Applications
Shanxiang Wang, Zailiang Chen, Fei Qi, Chenghai Xu, Chunju Wang, Tao Chen, Hao Guo
Summary: This paper proposes a fractal reconstruction method to characterize the surface microstructure of ultra-high temperature ceramics after thermal shocks. A fractal convolutional neural network model based on deep learning is established for automatic recognition, achieving a high recognition accuracy. This provides a new quantitative method for evaluating the surface character of ultra-high temperature ceramics.
FRACTAL AND FRACTIONAL
(2022)
Article
Chemistry, Physical
Xin Guan, Zhenwu Ma, Chunju Wang, Haidong He, Yuanjing Zhang, Xinwei Wang, Weiwei Zhang
Article
Nanoscience & Nanotechnology
C. J. Wang, B. Guo, D. B. Shan, X. B. Tian
REVIEWS ON ADVANCED MATERIALS SCIENCE
(2013)
