Article
Materials Science, Multidisciplinary
A. R. Vinod, Sameer Warghane, A. Murugan, N. Balashanmugam, N. Venkaiah
Summary: Inconel 625 superalloy was deposited on Ti6Al4V using Directed Energy Deposition (DED) additive manufacturing process to create a bimetallic structure with unique properties. The study investigated the effect of various process parameters on the microstructure and interface of the bimetallic structure. Different laser power, laser scan speed, and powder feed rate were used to study their influence on the melt-pool temperature, microstructure, elemental composition, phase evolution, and microhardness. The results showed the formation of various structures and phases, with intermetallic phases affecting the interface bonding.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Changle Sun, Junqi Shen, Shengsun Hu, Keping Geng, Naiqiang Xu
Summary: The addition of a Ni interlayer is effective in preventing the formation of brittle intermetallic compounds and improving the metallurgical bonds in the 316L/Ti6Al4V bimetallic structure.
Article
Materials Science, Multidisciplinary
Wang Chenyang, Xing Fei, Xu Guojian, Liu Xiangyu, Bian Hongyou
Summary: The bimetallic structure of TC4 and Inconel718 fabricated via Ta/Cu transition layer showed excellent mechanical properties and hardness. The microstructure and phase composition of the transition region changed, resulting in high hardness and ultimate tensile strength.
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
(2023)
Article
Materials Science, Ceramics
Jiandong Wang, Yuzhou Zeng, Xiaopeng Qi, Yu Xue, De Xu, Liqun Li, Yunxiang Tong, Fengchun Jiang
Summary: In this paper, TiCp/Ti6Al4V composites were fabricated using laser melting deposition (LMD) technology and the microstructure and microhardness of different deposited layers were analyzed. The results show that the composites have a graded microstructure and microhardness distribution. The microhardness increases gradually from the bottom layer to the top layer in the low power composite, while the high power composite shows a more significant increase in microhardness.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Ziyad Smoqi, Joshua Toddy, Harold (Scott) Halliday, Jeffrey E. Shield, Prahalada Rao
Summary: The study demonstrates that preheating the substrate and depositing the coating at moderate energy density can reduce cracking, while localized laser-based preheating and moderate energy density can mitigate steep temperature gradients to prevent thermally induced cracking of the Stellite coating in the inter-dendritic regions.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Wenbo Wang, Nuo Xu, Xiangyu Liu, Zhicheng Jing, Guojian Xu, Fei Xing
Summary: In this study, a bimetallic structure (BS) consisting of Inconel625 (IN625) nickel-base superalloy and Ti6Al4V (TC4) titanium alloy was successfully prepared using laser melting deposition (LMD) technology with Cu/V interlayers to prevent cracks and defects. The BS structure can be divided into four regions with different phase compositions and Vickers hardness distribution. The tensile strength of the IN625/TC4 BS with Cu/V interlayers reached around 514.5 ± 9.5 MPa at room temperature, and fractures occurred in region B.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Chemistry, Physical
Qingqing Li, Jie Chen, Xudong Wang, Yang Liu, Kun Jiang, Shiyu Yang, Yong Liu
Summary: Laser metal wire deposition was used to fabricate single-track cladding layers of GH3039 superalloy in this study, investigating the relationships between key processing parameters and geometrical characteristics. Empirical models were developed to predict the geometrical characteristics under applied processing parameters, and the microstructure and microhardness of the cladding layers were studied to facilitate industrial applications of laser metal wire deposition.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Hamed Ghadimi, Huan Ding, Selami Emanet, Mojtaba Talachian, Chase Cox, Michael Eller, Shengmin Guo
Summary: The study uses the solid-state additive friction stir deposition (AFSD) process to fabricate Al-Cu-Li 2050 alloy parts. The hardness distribution of the as-fabricated parts is unique due to the variations in the processing temperature profile. XRD results show the presence of secondary phases, and EDS mapping confirms the formation of alloying particles in the deposited matrix. The AFSD thermal-mechanical process results in a unique hardness distribution and reduced microhardness level in the components compared to the feedstock material.
Article
Materials Science, Multidisciplinary
Wenjun Zhang, Fenggang Liu, Fencheng Liu, Chunping Huang, Lixin Liu, Yongsheng Zheng, Xin Lin
Summary: This study investigates the effect of Al addition on the microstructure and microhardness of Inconel 718 superalloy fabricated by laser additive manufacturing. The addition of Al promotes the precipitation of different phases and increases hardness, but also intensifies the segregation of Nb element, leading to the formation of Laves phase.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Manufacturing
Qimin Shi, Gaoyan Zhong, Yi Sun, Constantinus Politis, Shoufeng Yang
Summary: This study vertically prepared Multi-Material parts of H13 tool steel and IN625 superalloy by SLM, revealing the interfacial macrosegregation mechanism. The laser melting+remelting strategy developed can mitigate interfacial macrosegregation and efficiently migrate H13 into IN625 molten pools.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Multidisciplinary
Zhan-Qi Liu, Xiao-Ou Zhu, Gui-Li Yin, Qi Zhou
Summary: A TC4/TiAl bimetallic structure was fabricated by laser additive manufacturing (LAM) to study the microstructure evolution in the transition zone. The mechanical properties of the fabricated bimetallic structure were comparable to those of the as-deposited TiAl alloy.
MATERIALS SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Nandana Menon, Brady A. A. Sawyer, Cory D. D. Jamieson, Edward W. W. Reutzel, Amrita Basak
Summary: The objective of this study was to compare the microstructure and microhardness properties of IN718 deposited by powder- and wire-fed laser-directed energy deposition (L-DED) processes. Single-layer single-track specimens were fabricated using different process parameters to determine the optimal parameters for both systems. Thin-wall specimens with identical designs were then built using the finalized parameters and characterized using microscopy and microhardness measurements. The results showed that the powder-fed specimen had no distortion while the wire-fed specimen had less porosity. Differences in elemental segregation were also observed, with nitrides and carbides present in the wire-fed specimen but not in the powder-fed specimen. Microhardness measurements revealed higher values for the powder-fed specimen compared to the wire-fed specimen. These findings can be applied to fabricate parts with varying microstructure and microhardness properties using sequential powder and wire deposition to achieve biomimetic structures.
Article
Chemistry, Physical
Radim Kocich
Summary: Thermomechanical processing is an effective method to improve the performance of bimetallic laminates. This study optimized the treatment conditions for an Al + Cu bimetallic laminate and found that the microstructure characteristics, such as grain size and grain boundaries, were closely related to the applied thermomechanical procedure. The measured electric characteristics showed that the heat-treated laminate had the lowest specific electric resistivity for DC transfer, while the 10 mm laminate exhibited advantageous behavior during AC transfer.
Article
Materials Science, Coatings & Films
A. S. Chaus, O. G. Devoino, M. Sahul, L. Vanco, I. Buransky, M. Kusy
Summary: This study describes the evolution of microstructure in 17-4PH stainless steel during laser surface alloying, with a focus on the influence of surface topography and roughness. It was found that the surface topography and roughness played a significant role in the development of microstructure during laser surface alloying. The smooth samples exhibited a dendritic microstructure with a small amount of eutectic, while the rough samples showed a fully eutectic microstructure. This resulted in significantly different microhardness between the two samples, with values of 317.0 +/- 12.7 and 636.7 +/- 18.5 HV0.1 for the smooth and rough samples, respectively. The difference in microstructural features and microhardness was attributed to the degree of steel alloying with boron in the laser-melted zone, which was significantly influenced by the initial roughness of the sample surface. This mechanism can be utilized to improve laser surface alloying of additive manufactured products.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Optics
Ye Qiu, Guo-Ye Jiang
Summary: The study showed that adding zirconia can refine the microstructure of the coating, improve hardness, and reduce the friction coefficient. The wear pattern changed, and the high temperature resistance of the coating was enhanced.
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.