Article
Materials Science, Multidisciplinary
W. F. Xu, H. J. Lu, X. H. Li, M. Wang, J. Ma, Y. X. Luo
Summary: The study investigates the impact of welding process parameters on the stress corrosion cracking sensitivity of AA7085-T7452 joints, revealing the influence of elements distribution and microstructure on SCC sensitivity. The research also highlights the importance of Cu content reduction and grain boundary precipitate spacing in enhancing SCC sensitivity of FSW joints.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Shuaihao Qian, Timing Zhang, Yuhua Chen, Jilin Xie, Yi Chen, Tiesong Lin, Hongxiang Li
Summary: Ultrasonic Impact Treatment (UIT) was applied to enhance the corrosion resistance of friction stir welded joints in 2219 aluminum alloy. The results demonstrated that UIT effectively modified and refined the surface grains, leading to improved intergranular corrosion resistance and stress corrosion cracking resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Caroline Karina Chandra, Niklas Sommer, Ben Heider, Marcel Hatzky, Ruediger Reitz, Stefan Boehm, Matthias Oechsner
Summary: Friction stir welding allows joining of high-strength, lightweight aluminum alloys below the melting point by induced plastic deformation. However, specific zones along the weld seam area are susceptible to localized corrosion. Various approaches, including the use of novel multipin welding tools, are presented to lower the corrosion susceptibility and enhance corrosion resistance. Immersion tests, electrochemical measurements, and microstructural analysis are conducted to understand the corrosion behavior and identify the mechanisms influencing corrosion initiation.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiaao Ning, Wenbin Gao, Xiaoyan Gu, Hai Zhang, Wei Guan, Wenhang Li, Hang Liang, Dongpo Wang, John J. Lewandowski
Summary: The precipitation behavior of the Mg-rich phase and corrosion resistance of FSW AA5083 Al-Mg alloy were studied. Sensitization led to the formation of thick β-precipitates along the grain boundaries. Grain refinement and dislocation facilitated the precipitation of Mg-rich phases. After sensitization, the FSW joint became more vulnerable to intergranular cracking and stress corrosion cracking. The present work emphasizes the importance of considering the performance deterioration of Al-Mg structures during the design and manufacturing stages.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Yanqiu Wang, Yong Chen, Li Zhou, Yawei Shao, Li Liu, Jiantang Jiang
Summary: The macro-galvanic effect in friction stir welding joints of 7xxx aluminum alloy promotes localized corrosion. A new process route, SSW-T76, was developed to weaken this effect. The microstructure, chemistry, and corrosion behavior of joints prepared via SSW-T76 were compared to those prepared via the conventional route (T76W->FSW, T76W). It was found that the SSW-T76 route effectively suppressed precipitate coarsening and solute segregation, leading to decreased macrogalvanic effect and reduced pitting and IGC.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Zhixiong Zhu, Zongling Lang, Meng Xu, Pan Nie, Xingxu Jiang, Fengfeng Hu, Yongyong Lin
Summary: The addition of zinc in AA5083 aluminum alloy improves its properties, and the hardness distribution of friction stir welding joint shows a "W" shape. The joint with a rotation speed of 600 rpm has the best mechanical properties and no welding defects, while the alloy with 0.50 wt.% zinc exhibits the highest resistance to stress corrosion cracking.
Article
Materials Science, Multidisciplinary
Rajesh Yadav, Ankur Kumar, Gajanan P. Chaudhari, A. G. Paradkar
Summary: The 5059H116 alloy welded by friction stir welding (FSW) showed superior corrosion resistance, while the gas metal arc welding (GMAW) sample had a shorter time to failure due to factors such as chemical heterogeneities and the presence of micro-porosity.
Article
Materials Science, Multidisciplinary
Sen Lin, Yun-Lai Deng, Hua-Qiang Lin, Ling-Ying Ye, Zhen Zhang, Hua Ji, Xin-Ming Zhang
Summary: The microstructure, mechanical properties, and stress corrosion behavior of friction stir welded (FSWed) Al-Mg-Si alloy were studied. The average grain sizes of the different zones were measured, and it was found that the thermo-mechanically affected zone (TMAZ) had a narrow width. The FSWed joint had a lower ultimate tensile strength (UTS) compared to the base material, and was more susceptible to stress corrosion cracking (SCC), especially at higher temperatures.
Article
Electrochemistry
Prabhuraj Parasuraman, Rajakumar Selvarajan, Balasubramanian Visvalingam, Rajkumar Ilamurugan, Kavitha Subramanian
Summary: The study investigates the stress corrosion cracking behavior of FSW AA7075-T651 joints. The threshold stress of the parent metal and stir zone were found to be 242 and 175 MPa, respectively.
Article
Materials Science, Multidisciplinary
Yuming Xie, Xiangchen Meng, Feifan Wang, Yimeng Jiang, Xiaotian Ma, Long Wan, Yongxian Huang
Summary: The corrosion behavior of friction stir welded Al-Cu alloy and Al-Cu-Li alloy joints was studied via various methods, with a focus on precipitation-driven corrosion mechanism. It was found that increasing welding speed to reduce heat input is an effective strategy to improve corrosion resistance in these joints.
Article
Multidisciplinary Sciences
Ahmed Samir A. Alemdar, Shawnim R. Jalal, Mohammedtaher M. Mulapeer
Summary: This study aims to reduce the cost of manufacturing by using a hybrid design that combines AA2198-T8 alloys for crucial parts and AA2024-T3 alloys for the remaining structure. Two main techniques, reversed double-sided friction stir welding (DS-FSW) and traditional single-sided friction welding (SS-FSW), were used to join AA2024-T3 to AA2198-T8. The findings showed that the maximum joining efficiency of the welding process reached 96% for reversed DS-FSW at a welding speed of 102 mm/min.
Article
Chemistry, Physical
I. Chekalil, R. Chadli, A. Ghazi, A. Miloudi, M. P. Planche, A. Amrouche
Summary: This study focuses on the corrosion behavior of friction stir welded joint of aluminum alloy 3003. A comparison was made between the corrosion in the welded joint and the base metal to quantify the quality of FSW joints. Gravimetric and thermodynamic studies were conducted to determine corrosion resistance. Three aggressive media based on sodium chloride, hydrogen chloride, and ethylene glycol solutions were tested at four different temperatures. The results showed that temperature significantly affects corrosion rates, with higher rates observed in the base metal. The presence of ethylene glycol considerably reduces corrosion rates, particularly in the FSW joint, and follows the Langmuir isotherm to form a monolayer on the surface of both samples.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Materials Science, Multidisciplinary
Yuzhe Pan, Yu Wang, Fuqiang Guo, Tiehao Zhang, Kenji Matsuda, Dongting Wu, Yongang Zhang, Yong Zou
Summary: The research found that the charge transfer resistance in the 7N01 aluminum alloy welding joint is significantly lower than that of the base metal, with the worst resistance to stress corrosion in the thermal-mechanical affected zone, which can easily lead to the concentration of internal tensile stress and the formation of crack propagation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Caruline de Souza Carvalho Machado, Uyime Donatus, Mariana Xavier Milagre, Joao Victor de S. Araujo, Barbara Victoria G. de Viveiros, Rafael Emil Klumpp, Victor Ferrinho Pereira, Isolda Costa
Summary: This study investigated the microstructure and corrosion resistance of the stir zone (SZ) of the AA2198-T8 Al-Cu-Li alloy welded by friction stir welding (FSW) using microscopy, immersion tests, and electrochemical techniques. Severe localized corrosion (SLC) related to intergranular attack was observed in the SZ, while intragranular attack was found in the non-affected base metal (BM). The study revealed that SLC in both zones was caused by precipitates of high electrochemical activity.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Amlan Kar, Sergey Malopheyev, Sergey Mironov, Rustam Kaibyshev, Satyam Suwas, Satish V. Kailas
Summary: The friction stir welding of dissimilar materials results in composite weld nuggets containing hard particles dispersed in a soft matrix. The deformation and fragmentation of high-strength material like titanium in the weld nugget can affect the properties of the weld. Understanding the complex behavior of titanium during this welding process can help in engineering composites with desired mechanical properties.
MATERIALS CHARACTERIZATION
(2021)
Article
Metallurgy & Metallurgical Engineering
Shuwei Duan, Tao Wang, Yong Zou
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2019)
Article
Materials Science, Multidisciplinary
Shuwei Duan, Kenji Matsuda, Yong Zou, Tao Wang
MATERIALS RESEARCH EXPRESS
(2019)
Article
Chemistry, Physical
Wenyu Liu, Dongting Wu, Shuwei Duan, Tao Wang, Yong Zou
Article
Materials Science, Multidisciplinary
Shu-Wei Duan, Kenji Matsuda, Tao Wang, Yong Zou
Summary: By investigating the microstructures and mechanical properties of a novel cast Al-Cu-Li alloy during heat treatment, it was found that a relatively good combination of strength and ductility was achieved after natural aging. The complex precipitate distribution, decrease in density but increase in size of certain phases, and the presence of precipitate-free zones near grain boundaries were identified as key factors for the improvement in performance.
Article
Materials Science, Multidisciplinary
Fuqiang Guo, Shuwei Duan, Dongting Wu, Kenji Matsuda, Tao Wang, Yong Zou
MATERIALS RESEARCH EXPRESS
(2020)
Article
Materials Science, Multidisciplinary
Shuwei Duan, Fuqiang Guo, Dongting Wu, Tao Wang, Taiki Tsuchiya, Kenji Matsuda, Yong Zou
Summary: Pre-rolling deformation is more effective than pre-stretching in improving the performance of rolled Al-Cu-Li plates. The pre-rolling process promotes nucleation of the T-1 phase, inhibits formation of other phases, accelerates precipitation kinetics, and enhances mechanical properties. Increasing pre-strain can lead to higher T-1 phase density and improved aging response in Al-Cu-Li alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Jinqiu Liu, Fuqiang Guo, Tao Wang, Shuwei Duan, Yong Zou
Summary: The variation of corrosion resistance in narrow areas of FSW joints is difficult to characterize due to large temperature gradient. This study performed welding thermal simulation to simulate the HAZ and TMAZ of FSW 7075-T6 aluminum alloy, and studied the corrosion resistance and microstructure of the simulated samples. Results showed that corrosion potential changed significantly under different thermal simulation temperatures. The corrosion mechanism of HAZ and TMAZ were completely inconsistent, which was related to differences in precipitate and grain characteristics.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Materials Science, Multidisciplinary
Shuwei Duan, Zhongli Liu, Fuqiang Guo, Yuzhe Pan, Kenji Matsuda, Yong Zou
Summary: The aging precipitation behavior and its effects on the mechanical properties of a novel cast Al-Cu-Li alloy were investigated. It was found that during artificial aging, various phases precipitate sequentially, with the T1 phase and cubic phase showing excellent thermal stability. After aging, the alloy's tensile strength increases to 423 MPa, but the elongation decreases significantly.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yuzhe Pan, Shuwei Duan, Fuqiang Guo, Kenji Matsuda, Tao Wang, Yong Zou
Summary: In this article, a novel cryogenic-aging treatment was implemented by introducing deep cryogenic treatment (DCT) prior to artificial aging. The stress corrosion performance of Al-Zn-Mg-Cu alloy after cryogenic-aging treatment was investigated through mechanical properties testing, in-situ electrochemical testing, and microstructure analysis. It was observed that the optimal parameters were DCT-8h and 24h prior to double-stage aging treatment. Cryogenic-aging treatment extended the lifespan of the alloy under stress and corrosion media coupling. Furthermore, it promoted the multiplication of dislocations on the grain boundary or sub-grain boundary, which provided nucleation sites for precipitates and reduced the width of the precipitates-free zone (PFZ). The inhibition mechanism of stress corrosion by cryogenic-aging treatment was analyzed through in-situ electrochemical testing and microstructure observation, effectively preventing oxide film rupture and crack propagation. This study presents a simple and efficient process for enhancing stress corrosion performance, which has significant implications for the application of Al-Zn-Mg-Cu alloys in aerospace and transportation industries.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Yuan Yang, Shuo Li, Wei Huang, Huihui Shangguan, Christian Engelbrekt, Shuwei Duan, Lijie Ci, Pengchao Si
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
Article
Materials Science, Multidisciplinary
Ping Zhang, Xiujie Yue, Yeran Gao, Zhenyong Lin, Shunxiang Wang, Songting Zhang
Summary: This paper investigates the strengthening mechanism of highspeed cutting and solid particle-entrained waterjet peening (HSC-WJP) composite reinforcement on 7075-T6 aluminum alloy. The research results show that composite reinforcement can improve surface quality, reduce surface pits and roughness, and decrease the size of precipitation-free zone (PFZ) at grain boundaries.
Article
Materials Science, Multidisciplinary
Sangyoon Lee, Hwi Yoon, Sanghun Lee, Seung-min Chung, Hyungjun Kim
Summary: The wettability of metal oxides, particularly HfO2 thin films deposited via atomic layer deposition, and its correlation with surface free energy have been studied. It was found that surface oxygen species significantly affect the intrinsic hydrophilicity of HfO2 thin films, and the crystalline orientations also evolve with film thickness.
Article
Materials Science, Multidisciplinary
Changdong Yin, Yiwen Wu, Zhou Xu, Dongdong Ye, Jun Yao, Jianjun Chen, Qiang Liu, Xin Ge, Meiling Ding
Summary: This study proposed a new strategy to indirectly estimate the hydrogen diffusivity of metallic materials under tensile stress by combining the electrochemical hydrogen permeation test (EHPT), the hydrogen diffusion descriptive equation based on Fick's law, and hydrogen pre-charged tensile test. The results showed that the hydrogen permeation curve obtained was highly approximate to the theoretical trend. The hydrogen embrittlement (HE) susceptibility of the specimens increased with increasing stress.
Article
Materials Science, Multidisciplinary
Huan Luo, Wei-yi Wang, Xin Yu, Xian-jun Lei, Lang Liu, Guo-zheng Zha, Wen-long Jiang, Bin Yang, Bao-qiang Xu
Summary: Separating selenium and tellurium is a general challenge in material and non-ferrous metallurgical industries. This paper proposes a novel method that achieved efficient separation of selenium and tellurium using gas-liquid equilibrium phase diagram and valence regulation-vacuum gasification technique.
Article
Materials Science, Multidisciplinary
Fan Zhang, Rong Xin Wang, Aiqin Tian, Fangzhi Li, Jianping Liu, Hui Yang
Summary: Deposition of Pd/Pt/Au three-layer films on p-GaN under high and ultra-high vacuum conditions was studied to investigate the electrical contact properties. Linear I-V curves were observed in samples deposited under ultra-high vacuum conditions, while nonlinear I-V characteristics were obtained in samples deposited under high vacuum conditions. The study also found that the samples deposited under high vacuum conditions had higher amounts of oxygen and Pd oxide. The oxide layer had an additional influence on the electrical characteristics of the Pd/Pt/Au/p-GaN contact.
Article
Materials Science, Multidisciplinary
Hongli Liu, Chengzhe Liu, Ying Sui, Zhongxian Liu, Tiangang Zhang, Zhiqiang Zhang, Shuang Sun, Jianwei Jia
Summary: This study utilized polysiloxane and hafnium carbide to produce Si-N-C-O-Hf hybridized ceramic fibers, and obtained ceramic fibers with hemispherical particles on the surface through electrostatic spinning and pyrolysis. The ceramic fibers exhibited excellent thermal stability, oxidation resistance, and high temperature insulation.
Article
Materials Science, Multidisciplinary
M. Abaker, Nazar Elamin Ahmed, A. Saad, H. F. Khalil, E. M. M. Ibrahim, A. M. Adam
Summary: This paper systematically studied the internal structure and thermoelectric properties of In1-xGaxSb alloys prepared by melting synthesis at 1123 K. The results showed that doping with Ga in the In sites led to a significant increase in the Seebeck coefficient and power factor, while reducing the thermal conductivity. The maximum dimensionless figure of merit was observed at 403 K.
Article
Materials Science, Multidisciplinary
Fucheng Yu, Jinlong Ren, Jielin Zhang, Haiyang Chen, Xin Tian, Chenchen Feng, Cuixia Li, Jianbin Zhang, Xianxi Tang, Xiaogang Hou
Summary: An environmentally friendly ZnO@BiVO4 composite photocatalyst was prepared using in-situ self-assembly and solvothermal methods, demonstrating good photocatalytic performance. The mass ratio of BiVO4 and NCZ was found to influence the photocatalytic performance of the composite.
Article
Materials Science, Multidisciplinary
Yaoming Shao, Pingping Zheng, Tianhao Dong, Lianghuan Wei, Haifei Wu, Jianxiao Si
Summary: In this paper, Mg3Bi2 films were prepared on glass substrate using magnetron sputtering, and the phase composition and thermoelectric properties of the films were investigated with different atomic ratios. The films displayed a metastable cubic phase and high conductivity when the atomic ratio exceeded stoichiometry.
Article
Materials Science, Multidisciplinary
I. V. Uimanov, D. L. Shmelev, S. A. Barengolts
Summary: A two-dimensional axisymmetric model has been developed to study the prebreakdown processes in a cathode microprotrusion under an external electric field. The simulation results show that electrohydrodynamic instability leads to the formation of a nanometer-sized conical protrusion on the microprotrusion tip, significantly accelerating the heating process.
Article
Materials Science, Multidisciplinary
Weilun Zhang, Di Yang, Feng Gong, Yongjun Chen, Tian Chen, Zhiwen Xie, Sirui Yang
Summary: A novel Pt doping method was designed to improve the thermal stability of CrWN coating. The doping of Pt atoms effectively blocks the coherent growth of the grains and creates a significant mixing effect, resulting in a smooth surface with uniform element distribution.
Article
Materials Science, Multidisciplinary
Xiaoye Wang, Xiaoguang Yang, Wenna Du, Tao Yang
Summary: In this study, the effects of multiple growth parameters on self-catalyzed growth of InAs/GaSb axial heterostructured nanowires on Si substrate by MOCVD were investigated. It was found that the growth temperature and switching time have significant influences on the nanowire growth.
Article
Materials Science, Multidisciplinary
Weizhong Cui, Yan Zhao, Can Cui, Xing Liu, Beili Pang, Jianguang Feng, Hongzhou Dong, Liyan Yu, Lifeng Dong
Summary: This study introduces Co2+ cations into Cs2AgBiBr6 film to improve its quality, grain size, and conductivity, resulting in enhanced solar cell efficiency.
Article
Materials Science, Multidisciplinary
Jian Wang, Ke Yang, Xianming Cheng, Yalin Lu, Ganghui Wu, Yang Zhang, Yun Kan
Summary: The corrosion behavior and microstructural evolution of Sc microalloyed Al-3.2Cu-1.5Li alloys were investigated in detail. The microstructural results showed higher levels of dislocations density in the Sc microalloyed sample, which resulted in significantly refined grains and T1 precipitates. Microalloying with Sc changed the corrosion mode of the alloy and localized corrosion was found to occur preferentially at the subgrain within unrecrystallized grains with high grain stored energy.
Article
Materials Science, Multidisciplinary
Weifeng Liu, Na Liu, Kaiqiang Song, Meiqin Zeng, Zhongchen Lu
Summary: Monoclinic WO3 prepared through plasma milling exhibits higher photocatalytic activity due to its higher surface area, increased oxygen vacancies, and defects.