Article
Materials Science, Multidisciplinary
Nikolay V. Letyagin, Torgom K. Akopyan, Alexander A. Sokorev, Tatiana A. Sviridova, Stanislav O. Cherkasov, Yulbarskhon N. Mansurov
Summary: Ceramic coatings were successfully grown on the surface of as-cast aluminum alloys using plasma electrolytic oxidation (PEO), and the effects of Si and Ca alloying elements on the coatings were investigated. Increasing Si content led to higher porosity in the coatings, while coatings on Al-Ca alloys exhibited the best performance. The coatings had high microhardness and excellent corrosion resistance.
Article
Materials Science, Multidisciplinary
Ruojin Zang, Lipeng Ding, Flemming J. H. Ehlers, Zhihong Jia, Shaoqiang Xu, Yanjun Li, Lingfei Cao
Summary: The strength and formability of four 6000 series alloys were studied in relation to the Mg/Si ratio and Cu content. The results showed that alloy composition affects these properties through microstructural factors such as intermetallic particles, grain size, texture, and precipitates. Higher Mg and Cu contents led to lower yield strength in one temper condition but higher strength after paint baking. The Mg-rich alloys exhibited better formability due to the lower fraction of coarse intermetallic particles controlled by the Mg/Si ratio.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Hongxiang Jiang, Qiuju Zheng, Yan Song, Yanqiang Li, Shixin Li, Jie He, Lili Zhang, Jiuzhou Zhao
Summary: The influence of the rare earth element La on the microstructures and properties of Al-Mg-Si alloys has been investigated. It was found that adding minor La can increase the ultimate tensile strength and yield strength of the alloy by decreasing grain size and promoting the precipitation of (Mg, Si) phase.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Ceramics
Hongshuai Cao, Hao Li, Fujia Liu, Wenzhong Luo, Fugang Qi, Nie Zhao, Xiaoping Ouyang, Bin Liao
Summary: TiAlN ceramic coatings composed of alternating TiAl layer and TiAlN layer were prepared by FCVA technology to improve the surface properties of Al alloy. The influence of N2 flow rate on the microstructure and mechanical and tribological performance of the coatings was studied. The results showed that the coatings exhibited a multi-phase structure with varying preferred orientation, hardness, and wear rate with different N2 flow rates.
CERAMICS INTERNATIONAL
(2022)
Article
Electrochemistry
Arman Zarebidaki, Seyed Hesamaldin Lari Seyedzadeh
Summary: Eco-friendly Fe-P coatings with different phosphorus (P) contents were electrodeposited on copper substrate, and their microstructure and corrosion behavior in NaCl solution were investigated. The surface became smoother with increasing P content, but microcracks appeared at 20 wt% P. Coatings with 5 and 10 wt% P had a nanocrystalline structure, while coatings with higher P contents were fully amorphous. The coatings with 10 and 15 wt% P showed the best corrosion resistance due to their microstructure and smooth surfaces. Defect-free Fe-P coatings can enhance the corrosion resistance of copper and protect the substrate through galvanic effect.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Abbas A. Khalaf
Summary: This study proposes a novel method to predict the transition temperature during the undercooling process of hypereutectic Al-Si alloys, and investigates the factors influencing the transition temperature and spontaneous nucleation. By mixing precursor alloys, utilizing the Ostwald-Miers diagram, and selecting appropriate conditions, alloys with desirable microstructures can be formed.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Srinivasulu Grandhi, Min-Suk Oh
Summary: The effect of Ca content on the microstructures and electrochemical properties of hot-dip aluminizing coatings was investigated. It was found that Ca promoted the precipitation of CaAl2Si2, altering the morphology of the coating and improving the corrosion resistance. However, the inclusion of Ca did not significantly affect the long-term corrosion characteristics of the Al alloy coating.
Article
Nanoscience & Nanotechnology
T. K. Akopyan, N. A. Belov, N. Letyagin, F. O. Milovich, A. A. Lukyanchuk, A. S. Fortuna
Summary: The addition of indium trace has a significant impact on the structure and precipitation hardening response of Al-Si-Cu based casting alloy. Finer theta' phase precipitates with higher number density and spherical nanoparticles are formed in the alloy with trace addition. Uniaxial compression tests of peak aged samples show that the alloy with trace solute exhibits significantly higher yield strength compared to the base alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
A. B. B. Chaar, L. Rogstrom, M. P. Johansson-Joesaar, J. Barrirero, H. Aboulfadl, N. Schell, D. Ostach, F. Mucklich, M. Oden
Summary: The thermal behavior of cathodic arc deposited TiAlN coatings is affected by the microstructure, with different microstructures influencing the decomposition pathway and performance of the coatings.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Materials Science, Multidisciplinary
Bruna Callegari, Tiago Nunes Lima, Rodrigo Santiago Coelho
Summary: The excellent properties of aluminum-silicon (Al-Si)-based alloys, such as casting behavior, mechanical strength, and corrosion resistance, make them suitable for manufacturing lightweight components with complex geometries. The microstructure and properties of these alloys are influenced by the composition, and various alloying elements can be added to promote microstructural changes. Improving the microstructure and properties of cast Al-Si alloys is of great importance for weight reduction and safety enhancement. This paper provides an overview of research on the addition of alloying elements to Al-Si-based alloys and investigates the effects of these additions on microstructure and properties.
Article
Engineering, Mechanical
Chao Chen, Guorui Sun, Wenbo Du, Jiuqing Liu, Huijing Zhang
Summary: This paper gains a new understanding of heat input through the analysis of forming, microstructure, and properties of WAAM components. The results show that the forming morphologies, microstructure, and mechanical properties of thin-walled parts obtained under different parameters are significantly different with the same heat input.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Shuaihang Pan, Jie Yuan, Kaiyuan Jin, Narayanan Murali, Aaron Gladstein, Yuxin Zeng, Alan Taub, Xiaochun Li
Summary: This study systematically analyzed the reaction mechanism between Si and TiC in AlSi10Mg alloy and demonstrated that the addition of Mg accelerated the reaction. The study also found that the Mg-assisted reaction greatly lowered the ductility of the material. Therefore, the study proposed the use of other elements, such as Ag, to solve this reaction bottleneck.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Patricia Fernandez-Lopez, Sofia A. Alves, Itziar Azpitarte, Jose T. San-Jose, Raquel Bayon
Summary: This study found that the protective performance of PEO coatings on components with high requirements in corrosive environments can be improved through two post-treatments: polishing and sealing with a sol-gel layer.
Article
Materials Science, Multidisciplinary
Hong Ning, Yue Du, Jin-feng Li, Yong-lai Chen, Xu-hu Zhang, Wen You, Yong-lin Guo
Summary: The influence of Cu content on the hardenability of Al-xCu-1.1Li alloys was investigated. It was found that an increased Cu content resulted in a lower quenching depth and reduced strength. The presence of coarse Cu-enriched phase particles hindered the precipitation of T1 precipitates, leading to a greater reduction in strength for alloys with higher Cu content. These particles also caused solute depletion and the formation of a precipitation free zone at the grain boundaries.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Mechanical
Rohan Kumar Barooah, Jose Mario Paiva, A. F. M. Arif, Sushant Rawal, Bipasha Bose, S. C. Veldhuis
Summary: This study focuses on evaluating the coating performance of 10 different PVD coatings for automotive engine grade Al-12Si die-cast alloy, with a novel thin multilayered TiAlN coating showing the best wear resistance. A common wear pattern was identified for thin hard coatings on form taps for high silicon content aluminum alloy, with coating fractures along the edges of the lobe in a form tap revealed during detailed investigation of wear mechanisms.
Article
Materials Science, Multidisciplinary
Shuai Zhang, Shuye Zhang, Hongzhi Zhou, Kyung-Wook Paik, Tianran Ding, Weimin Long, Sujuan Zhong, Peng He
Summary: Microwave Hybrid Heating (MHH) is a promising method for material joining, allowing for selective and uniform heating. This experimental study focused on investigating the characteristics and reliability of joints made using nano-Sn-3.0Ag-0.5Cu soldering paste and MHH technique. The research findings showed that the shear strength of the joints reached its peak value under specific microwave power and exposure time, but decreased after thermal shock tests.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Peibin Ma, Mingyang Wang, Aiying Chen, Lijian Gu, Zhiyi Ding, Xiaogui Wang, Bin Gan
Summary: Nano-twinned boundaries in high-temperature alloys play a crucial role in regulating the distribution of nano-precipitates and enhancing mechanical properties.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jiachen Zhang, Fan Lu, Xinxin Liu, Taiwen Huang, Rui Li, Changsheng Tan, Guojun Zhang, Lin Liu
Summary: This study investigates the effects of Re and Ta interactions on the precipitation of the TCP phase in experimental alloys under long-term thermal exposure. The study finds that microstructure segregation is not fully eliminated even with standard heat treatment, and the interaction between Re and Ta enhances the formation of the TCP phase. Thermodynamic calculations and first-principles analysis reveal that Re significantly improves the driving force of TCP phase precipitation. The study also observes a phase transition from the sigma-phase to the P-phase, with Ni playing a crucial role in the diffusion process.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Ronit Roy, Adil Shaik, Matthew Topping, Fei Long, Mark R. Daymond
Summary: This study demonstrates the improvements in characterizing localized dislocation distribution using the HR-EBSD method compared to the conventional approach. Two extreme examples of deformation conditions were investigated to show the efficacy of HR-EBSD in identifying dislocations and subtle features. The direct correlation between slip bands and HR-EBSD estimated GNDs is also presented, enhancing the scope of this approach in identifying individual slip bands.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wenshan Guo, Hui Zhang, Qingjun Zhou, Guangchun Xiao, Ning Guo, Wei Zhao, Gang Wang
Summary: The microstructures and corrosion resistance of TC11 components were significantly improved using a high-power, high-speed laser metal deposition (LMD) process and subsequent post-heat treatment, with greater improvements observed in the deposition direction. The significant improvement of corrosion resistance in the deposition direction is mainly due to the weakening of the charged galvanic corrosion effect between the non-interlayer zone and interlayer zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Yuhan Ren, Jian Ye, Jiawei Zhang, Feng Ye
Summary: In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Geng Liu, Linran Yu, Jie Su, Ran Ding, Min Xiong, Qi Gao
Summary: In this study, a flash austenitization heat treatment approach was used to achieve a dual-phase microstructure consisting of retained austenite and fine-grained ferrite in low-carbon TRIP steel. Phase-field simulations revealed the acceleration of ferrite transition kinetics in the Mn-depleted region and the influence of chemical heterogeneity of C and Mn on the stabilization of austenite.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhichao Yang, Dehui Zheng, Zhen Wang, Tingbin Liang, Shuangbao Wang
Summary: In this study, the configurations, formation process, and properties of the Cu-rich layer formed during TJE of Al alloys were revealed using aberration-corrected scanning TEM (STEM), STEM image simulations, and first-principles calculations. The results showed a new orientation relationship between the Cu-rich layer and Al matrix, and provided insights into the formation mechanisms of the Cu-rich layer and Cu diffusion zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Chen, Ruyu Tian, Jiayue Wen, Yanhong Tian
Summary: In this study, the interfacial microstructure evolution and reliability of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Ni and Cu/Sn-3.0Ag-0.5Cu-0.05TiO2 (SAC305-0.05TiO2)/Ni interconnections under thermal shock were investigated. The results showed that the addition of TiO2 nanoparticles can suppress the growth of interfacial IMCs and improve the reliability of the connections.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Yunbin Lu, Yangju Feng, Wei Wang, Wenke Wang, Jianlei Yang, Wenzhen Chen, Guorong Cui, Dongdong Zhuang, Hongyang Cao
Summary: In order to improve the wear resistance of titanium alloy, titanium matrix composites with network distributed TiBw were fabricated. The results showed that the wear rate of the composites decreased by 17.2% at room temperature and 38.4% at high temperature compared to the TA15 alloy. The TiBw in the composites enhanced work hardening, improved thermal conductivity, and effectively hindered dislocation movement and promoted dynamic recrystallization during high-temperature wear.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jubert Pasco, Lu Jiang, Thomas Dorin, Ali Keshavarzkermani, Youliang He, Clodualdo Aranas Jr
Summary: The unique structure and solute distribution of CoCrMo alloys produced using Laser Powder Bed Fusion technique require custom heat-treating processes to achieve the targeted phase distribution and mechanical properties. This study investigates the phase transformation behavior and precipitate distribution of CoCrMo samples after aging heat treatment. The results show differences in phase fraction and nucleation sites between directly aged and solution heat-treated samples.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zipeng Ma, Meng Zhou, Baohong Tian, Yi Zhang, Heng Li, Xu Li, Jin Zou, Haoyan Hu, Ke Jing, Yong Liu, Alex A. Volinsky
Summary: In this study, two electrical contact composites were prepared using the vacuum hot pressing sintering endo-oxidation method. The addition of Y2O3 had no negative effects on the electrical conductivity and hardness of the composites. Moreover, it reduced the welding force and arc energy, and improved the stability of the contacts.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wei Sun, Ning Cui, Shuling Zhang, Tiewei Xu, Xiaopeng Wang, Fantao Kong
Summary: A laminated composite was successfully fabricated and its microstructure and mechanical properties were investigated. The composite exhibited high bonding strength, improved flexural strength and fracture toughness, and superior tensile properties compared to the monolithic alloy.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zih-You Wu, Yin-Ku Lee, Su-Yueh Tsai, Po-Yu Chen, Jenq-Gong Duh
Summary: With the development of the artificial intelligence (AI) industries, electronic packaging is advancing towards high density, high efficiency, and multi-functionality. The application of microbumps is necessary to achieve high density and small-scale interconnection. In this study, three types of full intermetallic compounds (IMCs) bumps were fabricated, and the mechanical and thermal properties of IMCs were analyzed. The results showed that the full IMCs bumps with added Ni and Zn exhibited consistent structure and excellent thermal stability, providing a reliable microstructure for application.
MATERIALS CHARACTERIZATION
(2024)