Article
Nanoscience & Nanotechnology
Chao Wang, Xin Lin, Lilin Wang, Shuya Zhang, Weidong Huang
Summary: 316L stainless steel fabricated by selective laser melting (SLM) has excellent corrosion resistance and high strength at cryogenic temperature, attributed to its unique microstructure with columnar grain structure and intragranular cellular structure. The mechanical properties at low temperature indicate that horizontal specimens have slightly better performance compared to vertical specimens.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
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
Nanoscience & Nanotechnology
Gyung Bae Bang, Young Jae Hwang, Won Rae Kim, Yeong Hwan Song, Gun Hee Kim, Soong-Keun Hyun, Sung Chul Cha, Heon Joon Park, Taeg Woo Lee, Hyung Giun Kim
Summary: AISI 440C stainless steel has excellent mechanical properties, but its industrial application is limited due to its high hardness and low workability. Selective laser melting (SLM) is an effective method to improve its workability. In this study, specimens were fabricated under 36 different process conditions to observe changes in porosity. The microstructure and defect generation mechanism were analyzed for specimens fabricated under high-density process conditions. The phase change and mechanical properties of defect-free SS440C were also investigated and compared with previous studies.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Haoyu Chen, Wenshu Li, YiYu Huang, Zhonghao Xie, Xiebin Zhu, Bin Liu, Bingfeng Wang
Summary: By modifying the microstructure of the molten pool, the mechanical properties of SLM 316L SS can be improved for high-velocity deformation, enabling its application in this field. Optimal volumetric energy density of 145.83 J/mm3 resulted in the largest molten pool size and exhibited excellent impact energy and compressive strength. However, cracks along the molten pool boundaries and misorientation of grains limit the overall performance of the material.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Zhongfa Mao, Xiangdong Lu, Hongru Yang, Xiaodong Niu, Lujie Zhang, Xuefen Xie
Summary: Selective laser melting (SLM) has become a key technique for fabricating novel mold with high cooling efficiency in the mold field. This study systematically investigates the action mechanism of SLM processing parameters on densification of 18Ni300 maraging steel, as well as the phase identification, microstructural evolution, nanoprecipitation behaviors, and mechanical properties of the samples. The optimal processing parameter set and resultant relative density of as-built samples can be obtained, showing comparable mechanical properties to the corresponding wrought samples.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Pan Ma, Yacheng Fang, Shuimiao Wei, Zhiyu Zhang, Hong Yang, Shiguang Wan, Konda Gokuldoss Prashanth, Yandong Jia
Summary: To enhance the forming capability and performance of AlCoCrFeNi high entropy alloy (HEA) and prevent crack formation, equiatomic CoCrFeNiMn HEA was added into equiatomic AlCoCrFeNi HEA to form a novel AlCoCrFeMnNi HEA. The formability, microstructure, and mechanical properties of three different compositions were analyzed using the selective laser melting (SLM) technique. Results showed that AlCoCrFeMnNi displayed a composite-like dual-phase structure and the SLM forming capability improved with decreasing Al content.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Shifeng Liu, Yunzhe Li, Yan Wang, Yingkang Wei, Liangliang Zhang, Jianyong Wang, Xin Yang
Summary: WC-Co particle reinforced AISI 1045 steel composites produced by selective laser melting (SLM) exhibit higher Vickers hardness and wear resistance due to finer grains and higher relative density.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Chenyang Jiang, Xiaoqiang Li, Hao Luo, Jingmao Li, Shengguan Qu, Chao Yang
Summary: Selective laser melting was used for the first time to fabricate DT300 ultra-high strength steel, resulting in fully dense parts with greater than 99% relative density. The study also explored the types and formation mechanism of defects under different conditions. The specimens fabricated with optimized parameters exhibited outstanding mechanical properties and surface quality.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Engineering, Manufacturing
Guanyi Jing, Zemin Wang
Summary: The use of high laser power in selective laser melting technology can improve productivity and eliminate surface defects, resulting in high-density 3D printed parts. The combined use of high laser power and low scanning speed with a soft scraper can achieve a relative density of over 99.9% for 300M steel parts. Additionally, the as-printed parts exhibit a heterogeneous microstructure with alternating stacks of low-temperature tempered martensite and high-temperature tempered martensite.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Sheng Li, Wenbin Qiu, Tianyu Zhao, An Li, Yang Tan, Pan Wen, Chuan Wu, Juan Du, Jun Tang
Summary: RAFM steel with high strength and excellent ductility was successfully fabricated by SLM technology, showing significant superiority in mechanical properties compared to conventional materials, which provides a potential method for the preparation of structural materials for nuclear fusion.
Article
Materials Science, Multidisciplinary
Zihao Yuan, Chenyu Xiao, Hao Liu, Xuejing Sun, Guangyi Zhao, Hongbin Liao, Wei Qian, Jingkun Yuan, Changshi Lao, Huajie Wang
Summary: Cube and tensile samples of reduced activation ferritic/martensitic steel were produced using a selective laser melting process. The microstructure and tensile properties of the samples were investigated. The results showed high relative density, distribution of nano-sized precipitates, and a combination of columnar and equiaxed grain structures. The samples with higher power and scanning velocity exhibited higher yield strength and elongation.
Article
Chemistry, Physical
Jiaqi Zhang, Minjie Wang, Liuhui Niu, Jianye Liu, Jinhai Wang, Yu Liu, Zhenwei Shi
Summary: This study investigates the effects of three heat treatment processes on a new type of martensitic stainless steel CX alloy formed by selective laser melting. The results show that the ST+AT treatment exhibits the best comprehensive performance for the steel alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Xuejiao Wang, Meihong Liu, Zhenhua Li, Bibo Yao, Bei Wang, Ning Wang
Summary: This paper investigated the process parameters for selective laser melting of 40Cr steel and found the optimal parameters through finite element analysis and experiments. The results showed that the samples with maximum relative density exhibited superior mechanical properties and microstructure, surpassing 40Cr specimens made by other manufacturing methods.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Nanoscience & Nanotechnology
Yanan Wang, Liangshun Luo, Tong Liu, Binbin Wang, Lei Luo, Junhao Zhao, Liang Wang, Yanqing Su, Jingjie Guo, Hengzhi Fu
Summary: Maraging steel with a new composition can improve strength and ductility through selective laser melting. The relationship between laser process parameters and forming defects was studied, and film-like reverted austenite was found in the as-fabricated part. Heat treatment processes can help alleviate the strength-ductility trade-off of maraging steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
X. Cui, S. Zhang, C. H. Zhang, J. Chen, J. B. Zhang, S. Y. Dong
Summary: 24CrNiMo low alloy steels fabricated by selective laser melting showed significantly improved densification level with increasing volumetric energy density. The microstructure mainly consisted of high-containing martensite (M) and low-containing lower bainite (LB), while the grain size and microhardness both increased with the increase in volumetric energy density.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Rathinavelu Sokkalingam, Zhao Chao, Katakam Sivaprasad, Veerappan Muthupandi, Jayamani Jayaraj, Parthiban Ramasamy, Juergen Eckert, Konda Gokuldoss Prashanth
Summary: CoCrFeMnNi high-entropy alloy/AISI 316L stainless steel bimetal was fabricated using SLM, showing enhanced hardness and tensile strength due to the composition and structure advantages. However, the presence of defects and higher susceptibility to pitting corrosion in CoCrFeMnNi-HEA make it more prone to corrosion attack in corrosive environments.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sabine C. Bodner, Kostyantin Hlushko, Kevin Kutlesa, Juraj Todt, Oliver Renk, Michael Meindlhumer, Florian Resch, Marc-Andre Nielsen, Jozef Keckes, Jurgen Eckert
Summary: The correlations between process conditions, microstructure, and mechanical properties of additively manufactured components are explored in this study. The results show that the applied hatch strategy has a significant impact on the microstructure and mechanical properties of the samples, especially the anisotropy observed in the plane perpendicular to the build direction.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sepide Hadibeik, Florian Spieckermann, Martin Nosko, Farzad Khodabakhshi, Mahmoud Heydarzadeh Sohi, Juergen Eckert
Summary: A novel approach for fabricating bulk metallic glass using additive manufacturing has been studied, however, there are challenges, such as unmelted powder and compositional deviation, that need further investigation to optimize the process parameters.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jelena Petrusa, Benjamin Meier, Gerda Gruenbacher, Wolfgang Waldhauser, Juergen Eckert
Summary: The effects of laser energy density on the relative density and microstructure of cp-TiGd2 fabricated by LB-PBF were studied, and the influence of printing orientation and different surface treatments on surface topography and biocompatibility were investigated. The aim is to develop additive manufacturing process parameters that can achieve full density and satisfactory biocompatibility for cp-TiGd2 as a low-cost alternative to biomedical materials. An optimized process with high density, improved surface roughness, and noncytotoxicity was achieved using a wide range of process parameters.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
Zequn Zhang, Simon Fellner, Sergey Ketov, Megan J. Cordill, Huaping Sheng, Christian Mitterer, Kaikai Song, Christoph Gammer, Juergen Eckert
Summary: The phase evolution of alloys and atomic diffusion are closely related. However, the influence of reactive diffusion on phase formation in high-entropy alloys (HEAs) is still not clear. This study investigates the phase evolution of a multicomponent CoCrFeNi/Al diffusion couple and reveals the combined effects of enthalpy and entropy on phase formation in HEAs at elevated temperatures. Surface modification of HEAs can be achieved through film deposition and annealing processes.
Review
Electrochemistry
Baran Sarac, A. Sezai Sarac, Juergen Eckert
Summary: This review provides an introduction to the use of advanced amorphous metal catalysts for hydrogen storage and production via electrochemistry. Pd-based metallic glasses have gained significant attention due to their unique atomic structure and properties for energy applications. The review covers the fabrication techniques, hydrogen sorption, hydrogen evolution, kinetics, and future prospects of Pd-based metallic glasses. Overall, it offers a comprehensive overview for large-scale hydrogen energy storage and production systems.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Keziban Huner, Baran Sarac, Eray Yuece, Amir Rezvan, Matej Micusik, Maria Omastova, Juergen Eckert, A. Sezai Sarac
Summary: The incorporation of iron and carboxylic acid-functionalized polyaniline into polymeric polycaprolactone structures enhances the electron-donating ability and conductivity of the compound, making it suitable for electrochemical immunosensors.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Article
Engineering, Mechanical
Bin Chen, Yunli Li, Daniel Sopu, Juergen Eckert, Wenping Wu
Summary: The shock-induced dynamic mechanical behavior and spallation failure of Ni-based single crystal superalloys are studied using non-equilibrium molecular dynamic simulations. Two modes of classical spallation and micro-spallation are observed during the spallation failure. The deformation mechanism is dominated by slip and drag of dislocations at low shock velocities, while complex phase transitions from FCC to BCC or disordered structures occur at higher velocities, leading to a decrease in spallation strength. The presence of voids significantly lowers the spallation strength, and the reduction in strength is proportional to the radius of the voids.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Xiaoming Liu, Zongde Kou, Ruitao Qu, Weidong Song, Yijia Gu, Changshan Zhou, Qingwei Gao, Jiyao Zhang, Chongde Cao, Kaikai Song, Vladislav Zadorozhnyy, Zequn Zhang, Juergen Eckert
Summary: This study utilizes high-temperature extrusion and annealing to optimize the microstructures and mechanical properties of the Co34Cr32Ni27Al3.5Ti3.5 multicomponent alloy. Hot extrusion reduces grain sizes and promotes the precipitation of nanoparticles inside the FCC matrix and grain boundaries. Subsequent annealing regulates the microstructures and enhances the mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ming-Wei Wu, Kai Ni, Yang Lei, Xin-Xing Xiong, Yi-Ting Chuang, Quiao-En Lin, Pei Wang, Parthiban Ramasamy, Juergen Eckert
Summary: Selective laser melting (SLM) was utilized to produce CuZrAl metallic glass (MG) scaffolds with combined lattice structures of body-centered cubic and face-centered cubic (F2BCC), and the effects of lattice structures on mechanical behavior were investigated. The results revealed that curved struts remarkably enhanced compressive ductility by 122% and energy absorption by 106%. The presence of curved struts effectively prevented catastrophic shear fracture and delayed fracture occurrence due to the release of strain concentrations. This study demonstrates the potential of improving the ductility and toughness of SLM MG components through appropriate lattice structure design.
Article
Chemistry, Multidisciplinary
Xin Ai, Binghua Lei, Magdalena O. Cichocka, Lars Giebeler, Ruben Bueno Villoro, Siyuan Zhang, Christina Scheu, Nicolas Perez, Qihao Zhang, Andrei Sotnikov, David J. Singh, Kornelius Nielsch, Ran He
Summary: In this study, an improved p-type HfNi1-xCoxSn thermoelectric material was reported with a record-breaking Seebeck coefficient exceeding 200 μV K-1 by doping 5 at% Co at the Ni sites. By optimizing the carrier concentration, a maximum power factor of 2.2 mW m(-1) K-2 at 973 K was achieved. The enhanced p-type transport was attributed to the reduced content of Ni defects and the lattice softening and phonon scattering effect of Co doping. This approach provides a new method to manipulate the intrinsic atomic disorder in half-Heusler materials, facilitating further optimization of their electronic and thermal properties.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Phil Goldberg, Avinash Hariharan, Frederic Schell, Martin Hantusch, Magdalena Ola Cichocka, Nicolas Perez, Andrea Voss, Lars Giebeler, Volker Hoffmann, Christoph Zwahr, Andres F. Lasagni, Annett Gebert
Summary: Direct laser interference patterning (DLIP) is used to tune the surface properties of additively manufactured near-beta Ti-13Nb-13Zr using nanosecond (ns) and picosecond (ps) pulses. Multiscale surface chemical and microstructural analyses are performed to understand the corrosion behavior in a physiological PBS solution. Both ns-DLIP and ps-DLIP control the surface wettability, limiting corrosion and metal ion release rates, with ns-DLIP showing enhanced corrosion stability compared to ps-DLIP.
Article
Chemistry, Physical
M. Wolff, R. Wonneberger, K. E. Freiberg, A. Hertwig, J. Bonse, L. Giebeler, A. Koitzsch, C. Kunz, H. Weber, J. K. Hufenbach, F. A. Mueller, S. Graef
Summary: This study investigates the formation of femtosecond laser-induced periodic surface structures on different compositions of BMGs. The results show that despite the different chemical compositions, the generated surface patterns by laser irradiation exhibit similar properties.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Baran Sarac, Remzi Gurbuz, Matej Micusik, Maria Omastova, Amir Rezvan, Eray Yuece, Lixia Xi, Juergen Eckert, Ali Ozcan, A. Sezai Sarac
Summary: This study focuses on the synthesis and properties comparison of a novel organic composite nanofiber material consisting of styrene-butadiene-styrene (SBS) copolymer blended with polystyrene (PStyr) and carbon nanotubes (CNTs). The addition of CNTs retards the crystallization process and decreases the absorbance of both SBS/PStyr and PStyr/PBu in Fourier transform infrared spectroscopy. The interaction of CNTs with the blend is limited in samples with SBS, as observed in Raman spectroscopy.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Article
Chemistry, Physical
Konrad Kosiba, Tobias Gustmann, Jong Tae Kim, Jinwoo Seok, Juree Jung, Lukas Beyer, Sergio Scudino, Lars Giebeler, Junhee Han, Julia K. Hufenbach
Summary: High-power laser power bed fusion (HP-LPBF) technology enables additive manufacturing at higher build-up rates, making it attractive for industrial applications. The cooling rate during HP-LPBF was experimentally determined and found to vary with layer thickness and laser power. Higher build-up rates can be achieved with relatively low cooling rates, but this can affect the microstructure and properties of the manufactured components.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
