Article
Materials Science, Multidisciplinary
Ya Wei, Zhimin Pan, Yu Fu, Wei Yu, Shilei He, Qingying Yuan, Hong Luo, Xiaogang Li
Summary: This study investigates the corrosion and passive behavior of Ti-3Mo titanium alloy with different annealing temperatures in hydrochloric acid solution. The results show that the corrosion rate increases with an increase in annealing temperature, which can be attributed to the accelerated dissolution of the passive film and the formation of microgalvanic cells.
Article
Materials Science, Multidisciplinary
Liang Wei, Weimin Qin
Summary: The corrosion behavior of AlCoCrFeNi2.1 eutectic high-entropy alloy in aerated sulfuric acid solution was studied. The corrosion mechanism involves micro-galvanic corrosion cells and localized corrosion between different phases. The alloy shows better corrosion resistance compared to most Al-containing dual-phase HEAs.
Article
Materials Science, Multidisciplinary
Yipu Sun, Wei Liu, Longjun Chen, Tianyi Zhang, Hai Li, Bo Zhang, Weijian Yang, Jinhui Cui, Bowen Hou, Fulong Wang, Baojun Dong
Summary: The corrosion resistance of low alloy steels can be enhanced by incorporating copper, which effectively suppresses active dissolution. However, prolonged immersion leads to uneven copper distribution in the corrosion product film, resulting in degradation of corrosion resistance.
Article
Chemistry, Physical
Zhijian Zhang, Tiechui Yuan, Ruidi Li
Summary: The corrosion behavior of the SLM MEA and cast MEA was compared, revealing that the SLM MEA has inferior corrosion resistance due to metallurgical defects and smaller grain size. Specifically, the XY-plane of the SLM MEA showed poorer corrosion resistance than the XZ-plane, attributed to metallurgical defects, lack of fusion pores, and higher grain boundary density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Fengting Cao, Zequan He, Tiegang Wang, Qixiang Fan, Yanmei Liu, Jiantao Tao, Guangyao Gao, Xiaobin Luo, Jubo Peng, Shanshan Cai
Summary: The corrosion behavior of Sn-58Bi alloy in DL-malic acid solutions is influenced by the concentration of DL-malic acid, with increasing concentration leading to first an increase and then a decrease in corrosion resistance.
Article
Chemistry, Physical
Anas Ben Romdhane, Delphine Veys-Renaux, Mouhamadou Moustapha NDiaye, Stephanie Bruyere, Khaled Elleuch, Emmanuel Rocca
Summary: This study investigates the anodizing of AS12 alloys in various alkaline media, providing insights into the role of silicon in the aluminum matrix on the duplex nanostructure formation and micro-arc anodizing initiation. Addition of fluorides or silicates enhances the resistive properties of the internal anodic layer, improving the efficiency of the anodizing process. The corrosion resistance of AS12 in NaCl 0.1 M is increased by the presence of the oxide coating and the nature of the additive incorporated compounds.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Yu-Jui Lin, Chao-Sung Lin
Summary: The corrosion behavior and corrosion rate of friction stir welded AZ31B magnesium alloy and 6N01 aluminum alloy dissimilar joints were studied using real-time imaging, potentiodynamic polarization, EIS, and hydrogen evolution tests. The corrosion rate was found to increase in the order of Al base metal < Mg base metal < stirred zone. The galvanic coupling of the Mg phase to other phases enhanced the corrosion of both base metals, and intense corrosion at BM-AZ31B elevated the interfacial pH due to water reduction on the cathodic particles of BM-6N01.
Article
Materials Science, Multidisciplinary
Runze Wei, Changyao Ouyang, Rui Wang, Chunjiang Zhao, Rui Deng, Huan Li
Summary: Fe-based alloy coatings were applied on the surface of ductile cast iron using high-speed laser cladding. The impact of chromic acid anodization on the corrosion resistance of these coatings was investigated. The results showed that increasing the anodization time initially reduced the corrosion rate, but then it started to rise. After 20 minutes, the coating exhibited a passivation film of Cr and Fe oxide, with maximum impedance value (5.40 x 10(5) Omega center dot cm(2)), polarization resistance (50.6 k Omega center dot cm(2)), and minimum self-corrosion current (0.77 mu A/cm(2)). The corrosion resistance of the coating significantly improved.
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
Ankur Kumar, Gajanan P. Chaudhari, S. K. Nath
Summary: The stress corrosion cracking (SCC) behavior of high-zinc (>7 wt%) 7068 alloys treated with different retrogression and re-ageing processes was investigated. The resistance to SCC and inter-granular corrosion was found to be correlated with microstructural and compositional heterogeneities. Specimens that were pre-aged at 1000C and retrogression treated at 180 degrees C showed slower reduction reaction kinetics in polarization studies, indicating better SCC resistance. The oxygen reduction kinetics were also affected by the size of matrix precipitates, in addition to the microchemistry of grain boundary precipitates. An increase in copper content of discontinuous boundary precipitates did not consistently lead to improved SCC resistance. 7068 alloy specimens pre-aged at lower temperature exhibited higher strength and SCC resistance.
Article
Materials Science, Multidisciplinary
Daria Gisinger, Rene Kube, Helmuth Sarmiento Klapper
Summary: This research investigates the pitting susceptibility of selective laser melted alloy 718 in simulating drilling environments and characterizes its electrochemical behaviors through relevant tests. The microstructural characteristics of alloy 718 are also studied.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2023)
Article
Materials Science, Multidisciplinary
Heon-Young Ha, Kyeong-Won Kim, Seong-Jun Park, Tae-Ho Lee, Hyungkwon Park, Joonoh Moon, Hyun-Uk Hong, Chang-Hoon Lee
Summary: The effects of Cr on the microstructure, pitting corrosion resistance, and passive film properties of lightweight steel were investigated. The optimal Cr content for a homogeneous microstructure was found to be 5 wt%, which resulted in a (Cr,Al)-enriched passive film and improved resistance to pitting corrosion.
Article
Chemistry, Physical
Xianyu Gu, Yanxin Zhuang, Dong Huang
Summary: Electrochemical methods were used to investigate the corrosion behaviors and microstructural evolutions of Al0.3CoCrFeNiSix and Al0.3CoCrFeNiTix high-entropy alloys in NaCl solution. The addition of Si promoted the formation of BCC phase, improving the corrosion resistance of Si-x alloys. On the other hand, the addition of Ti reduced the grain sizes and enhanced the corrosion resistance of Ti-x alloys. XPS analysis revealed that the contents of oxidized Cr3+ and Fe3+ in the passive film contributed to the improved corrosion resistance of Si-x alloy, while the contents of oxidized Cr3+ and Ti4+ contributed to the improved corrosion resistance of Ti-x alloy.
Article
Materials Science, Multidisciplinary
Sang-Jin Ko, Yun-Ho Lee, Ki-Seok Nam, Eun-Ha Park, Jung-Gu Kim
Summary: The effects of different surface conditions, namely carbonaceous residue, copper chloride, and deposit, were quantitatively evaluated for their impact on localized corrosion. Electrochemical analysis and corrosion simulation showed that all three surface conditions induced localized corrosion on copper, with the pitting factor increasing in the order of deposits, copper chloride, and carbonaceous residue. Corrosion simulation further revealed that the galvanic corrosion current density increased as the surface coverage and density of chloride residue decreased.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
L. Prince, M-A. Rousseau, X. Noirfalise, L. Dangreau, L. B. Coelho, M. -G. Olivier
Summary: This study investigated the effect of carbonate ions on the corrosion protection of AZ31 magnesium alloy, highlighting the inhibitive effect of CO32- ions and discussing the underlying mechanisms. Multiple techniques including EIS, potentiodynamic polarization measurements, hydrogen evolution tests, SEM-EDX analysis, and XPS were used to analyze the corrosion behavior.
Article
Materials Science, Multidisciplinary
Lingyun Feng, Xixi Dong, Qing Cai, Bin Wang, Shouxun Ji
Summary: The microstructures and tensile properties of high-pressure die-cast Mg1.6La1.0Ce alloy with different Nd contents were investigated. The addition of Nd changed the eutectic morphology and improved the strength of the alloy.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Nanoscience & Nanotechnology
Jianying Wang, Jianpeng Zou, Hailin Yang, Zhilin Liu, Shouxun Ji
Summary: This study investigates the effect of minor Mo doping on the microstructure and mechanical properties of a (CoCrNi)(95)Mo-5 medium-entropy alloy. The results demonstrate that selective laser melting can achieve high strength and ductility in the alloy by creating a hierarchical microstructure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Fei Lei, Tao Wen, Feipeng Yang, Jianying Wang, Junwei Fu, Hailin Yang, Jiong Wang, Jianming Ruan, Shouxun Ji
Summary: Selective laser melting (SLM) can improve the mechanical properties of H13 steel by optimizing the process parameters and establishing the correlation between microstructure and mechanical properties. Through examination of microstructures, it was found that the SLMed H13 exhibited cellular structures and columnar grains, with lath martensite and retained austenite containing nanoscale carbides. The as-SLMed H13 showed excellent strength-ductility synergy due to the fine grains, unique cellular structures, and presence of dislocations.
Article
Materials Science, Multidisciplinary
Jianying Wang, Jianpeng Zou, Hailin Yang, Xixi Dong, Peng Cao, Xiaozhou Liao, Zhilin Liu, Shouxun Ji
Summary: Superior mechanical properties have been achieved in a coarse-grained single-phase face-centered cubic (fcc) medium-entropy alloy (MEA) by carefully designing multi-scale heterogeneous structures. The alloy exhibits high ultimate tensile strength and fracture strain, mainly attributed to the favorable heterogeneous fcc matrix, coherent spherical precipitates, and a high density of crystalline defects.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Chenxu Ma, Mengzhen Zhu, Jianying Wang, Xiongwen Zhou, Haixia Xing, Shouxun Ji, Hailin Yang
Summary: The spark plasma sintering (SPS), subsequent cold rolling, and annealing process were used to enhance the mechanical properties and antibacterial rate of Ti-Cu alloys. The key to the improvement lies in the high-density in-situ Ti2Cu precipitates in the refined grain structures of the Ti-Cu alloys after rolling and annealing.
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)
Review
Crystallography
Shouxun Ji, Kai Wang, Xixi Dong
Summary: Semi-solid metal (SSM) processing is an attractive method for manufacturing near-net-shape components. This paper reviews the progress of shaping technologies and the formation of non-dendritic microstructure in SSM processing. It also compares advanced microstructural control technologies and processing methods for different alloys. The mechanisms to form non-dendritic microstructures and the formation of spheroidal multiple phases in eutectic alloys are summarized and discussed. The concluding remarks focus on the current challenges and developing trends of semi-solid processing.
Article
Chemistry, Physical
Lingyun Feng, Xixi Dong, Qing Cai, Bin Wang, Shouxun Ji
Summary: The microstructure and tensile properties of die-cast Mg-1.6 wt%La-1.0 wt%Ce alloys with Gd content ranging from 0 wt% to 3.0 wt% were investigated. The addition of Gd resulted in an increase in yield strength and volume fraction of intermetallic compounds, while having limited effect on the grain size of the Mg matrix phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jianying Wang, Feipeng Yang, Hailin Yang, Lijun Zhang, Yingying Zhang, Zhilin Liu, Shouxun Ji
Summary: The heat-treatment response of an Al-5Mg(2)Si-2Mg alloy fabricated by laser assisted powder bed fusion (LPBF) was investigated, and it was found that direct ageing is an effective method to enhance the mechanical properties of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Anjing Wang, Jianying Wang, Feipeng Yang, Tao Wen, Hailin Yang, Shouxun Ji
Summary: A method of fabricating CoCrNi/TiN composite through spark plasma sintering (SPS) and rolling and annealing is presented to achieve a superior combination of strength and ductility. The superior synergy can be attributed to the refined structure, the formation of lattice defects, the interaction of nanotwin-TiN particles, and the concurrent process of potential grain boundary sliding.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Tao Wen, Feipeng Yang, Jianying Wang, Hailin Yang, Junwei Fu, Shouxun Ji
Summary: The microstructural evolution and mechanical properties of H13 steel fabricated by selective laser melting (SLM) with subsequent tempering treatment were systematically examined. The as-SLMed H13 samples exhibited a microstructure consisting of cellular structures, lath martensite, and a high volume fraction of retained austenite. After tempering at 600 degrees C for 1 h, nanoscale Cr23C6 particles were detected at the boundaries of the partially dissolved cellular structures. The improved mechanical properties of the H13 steel were attributed to the fine grains, retained cellular structures, and formation of Cr23C6 carbides.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Mechanical
Xiao Kang, Jianying Wang, Feipeng Yang, Xin Zhang, Youwang Tu, Lei Zhang, Hailin Yang
Summary: The purpose of this work is to synthesize CoCrNi/W/Agx composites with high wear resistance under ambient air and vacuum conditions. The friction and wear properties of these composites and CoCrNi medium entropy alloy were evaluated, and the chemical components and microstructural evolution of the tribo-films were analyzed using X-ray photoelectron spectroscopy and scanning electron microscopy. The self-lubricating mechanism of the CoCrNi/W/Agx composites under ambient air and vacuum conditions was also investigated. Increasing the Ag content increased the thickness of the tribo-films, improving the friction and wear properties of the alloys. The CoCrNi/W/Ag1.0 composite exhibited a significant improvement in tribological performance, with a high wear resistance of 2.79 x 10-5 mm3/N center dot m under vacuum condition and a volumetric wear rate as low as 1.35 x 10-5 mm3/N center dot m under ambient air condition.
Article
Materials Science, Multidisciplinary
Zhichao Shang, Xiaoping Cai, Farshid Pahlevani, Yan Zheng, Akbar Hojjati-Najafabadi, Xinran Gao, Baojing Zhang, Peizhong Feng
Summary: High porosity Co-Al-Fe intermetallics with 3D-microstructures were successfully synthesized in one step via a thermal explosion reaction. The link between pore structure and permeability was investigated using 3D-XRM technology. The corrosion resistance of the samples with different Fe contents was studied at 900 degrees C under an oxygen/sulphur atmosphere for up to 120 h. The results showed that the samples maintained stable pore structure and intact internal matrices, attributed to the formation of a thin protective layer on the surface. In addition, inward diffusion of S resulted in the formation of FeS nodules.
Article
Materials Science, Multidisciplinary
Lian Ma, Hain Yang, Daquan Zhang, Wei Wu
Summary: In this study, an environmentally friendly volatile corrosion inhibitor, lysine salts (LA), was prepared between graphene oxide (GO) layers using an in situ intercalation technique. The corrosion inhibition effect of LA was evaluated, and it was found that LA-GO2 achieved a 99.3% corrosion inhibition efficiency after composition optimization. The inhibition of the electrochemical anodic process on the surface of mild steel was the main reason for the high corrosion inhibition efficiency of LA-GO2. The properties of the surface film on the corroded steel were also characterized in detail to understand the corrosion inhibition mechanism of LA-GO2.
Article
Materials Science, Multidisciplinary
Running Wang, Jiaping Zhang, Bing Liu, Jie Fei, Qiangang Fu
Summary: By introducing a tailored SiC-C interphase, the carbon fiber can be effectively protected, improving the mechanical and ablation properties of leading edge shaped C/C-ZrC-SiC composites.
Article
Materials Science, Multidisciplinary
Zihua Wang, Chijia Wang, Ruitao Wang, Jiapeng Deng, Kun Zhang, Yanji Zhu, Huaiyuan Wang
Summary: A robust anti-corrosive coating has been developed using functional fly ash, which demonstrates excellent corrosion resistance and improved mechanical properties. The coating achieves these enhancements through molecular cross-linking design and surface augmentation techniques, resulting in a significantly improved impedance modulus compared to pure polyurea coatings.
Article
Materials Science, Multidisciplinary
Haofei Sun, Meifeng Li, Hao Zhang, Jing Liu
Summary: The oxidation behavior of FeCrNi medium entropy alloy was investigated through experimental observations and density functional theory (DFT) calculations. The study found that at 900 degrees C, the alloy forms a desirable and continuous oxide layer, while at 1000 degrees C, the oxide layer becomes discontinuous with penetration of oxide. These observations highlight the significant role of phase structure in promoting the formation of protective oxide scales and influencing oxidation resistance.
Article
Materials Science, Multidisciplinary
Yang Li, Ke Ma, Jingjun Xu, Jingjing Li, Yueming Li, Yi Zhang, Jun Zuo, Meishuan Li
Summary: Cr2AlC diffusion barrier effectively blocks the diffusion of Ti, enhancing the stability and spalling resistance of the Al2O3 scales between NiCrAlY coating and TiAl alloy.
Article
Materials Science, Multidisciplinary
Weiyi Wang, Qinglin Pan, Xiangdong Wang, Bing Liu
Summary: By adding Ce, Sc, Y and Zr elements to Al-Mg-Si alloy, the microstructure of the alloy can be regulated, and the corrosion and heat resistance of the materials can be improved.
Article
Materials Science, Multidisciplinary
Andrea Cristoforetti, Javier Izquierdo, Ricardo M. Souto, Flavio Deflorian, Michele Fedel, Stefano Rossi
Summary: This study presents a new approach to studying the mechanism of filiform corrosion in organic coated steel using the scanning vibrating electrode technique (SVET) and micropotentiometry (potentiometric SECM). The electrochemical activity under the coating was evaluated by mapping the ionic current densities coming from artificial defects made in specific locations of the filament. Antimony tips were also used to investigate the pH changes associated with different corrosion reactions at the metal-paint interface. Local pH levels along the filament in the anodic and cathodic regions were determined.
Article
Materials Science, Multidisciplinary
Yang Gao, Dayun Sun, Zhu Liu, Shuo Cong, Rui Tang, Yanping Huang, Lefu Zhang, Xianglong Guo
Summary: The corrosion characteristics of a novel alumina-forming austenitic steel in high-pressure high-temperature water environment were studied. The addition of aluminum has a negative effect on the continuity of the alumina scale.
Article
Materials Science, Multidisciplinary
Negin Madelat, Benny Wouters, Peter Visser, Zahra Jiryaeisharahi, Kristof Marcoen, Shoshan T. Abrahami, Annick Hubin, Herman Terryn, Tom Hauffman
Summary: This work explores the correlation between electrolyte transport properties and the variation of pigment volume concentration (PVC) in organic coatings. An odd random phase electrochemical impedance spectroscopy (ORP-EIS) approach is used to analyze the diffusion of ions independent from water uptake. The results show that a higher PVC leads to a more homogeneous coating structure, resulting in faster diffusion of ions and enhanced water uptake.
Article
Materials Science, Multidisciplinary
Eloa Lopes Maia, Serguei Gavrilov, Valentyn Tsisar, Kitty Baert, Iris De Graeve
Summary: The effect of pre-oxidation in air at 300-500°C on the initiation and development of liquid metal corrosion attack on 316L austenitic steel in static lead-bismuth eutectic (LBE) has been investigated. It was found that pre-formed oxide films can protect the surface against dissolution, while high temperature pre-oxidation leads to localized corrosion.
Article
Materials Science, Multidisciplinary
Baozhuang Sun, Qiuyu Wang, Yue Pan, Zhiyong Liu, Cuiwei Du, Xiaogang Li
Summary: In this study, a non-steady electrochemical model was established to investigate stress corrosion cracking (SCC). The model was verified using 304 SS with various microstructures, confirming its effectiveness in assessing SCC susceptibility.
Article
Materials Science, Multidisciplinary
Xingyu Xiao, Xinhua Liu, Zhilei Wang, Xuexu Xu, Mingying Chen, Jianxin Xie
Summary: The corrosion behavior and mechanisms of Cu-10Ni-X (Al, Fe, Mn, Cr, Sn, Ti, Zn) alloys in a 3.5% NaCl solution were systematically investigated. Both computational and experimental results revealed that except Ti, other elements could enhance the corrosion resistance of Cu2O passivation film.
Article
Materials Science, Multidisciplinary
Gen Zhang, Yan-Ping Huang, E. Jiang, Wei -Wei Liu, Hong Yang, Jing Xiong, Yong-Fu Zhao
Summary: The addition of aluminum has a significant influence on the intermetallic compounds in AFA alloys, particularly increasing the content of B2-NiAl phase. In the SCO2 environment, the oxide scales formed on AFA alloys with aluminum were thinner than on ASS without aluminum, and the structure of the oxide scales changed to a double-layer structure.
Article
Materials Science, Multidisciplinary
Yuxuan He, Guozheng Xiao, Chao Wang, Xuefeng Lu, Liuyuan Li, Shiying Liu, Yusheng Wu, Zhanjie Wang
Summary: The relationship between configurational entropy and lattice distortion in novel rare earth monosilicates was investigated, and the effect of configurational entropy on their properties was studied. The results showed that lattice distortion increased with the increase of configurational entropy, but a highly symmetrical crystal structure was formed when the configurational entropy was large enough, inhibiting the lattice distortion.
