Article
Chemistry, Physical
Zachary Young, Minglei Qu, Meelap Michael Coday, Qilin Guo, Seyed Mohammad H. Hojjatzadeh, Luis I. Escano, Kamel Fezzaa, Lianyi Chen
Summary: This study focuses on the effect of particle size distribution (PSD) on powder flowability and the laser melting process. It was found that PSDs near dense packing ratios significantly reduce flowability and powder beds made of powders with dense packing ratios exhibit larger build height during laser melting.
Article
Engineering, Chemical
C. Gallagher, E. Kerr, S. Mcfadden
Summary: Additive manufacturing powders require well-defined particle size distributions and spherical morphology for good powder flowability. Stereological corrections must be applied to measuring the particle size distributions, as the measured values typically underestimate the true diameters. Three stereological correction methods were assessed, and the Finite Difference Method was determined to be the most effective in improving the estimation of particle size distributions.
Article
Engineering, Chemical
Mahdi Habibnejad-korayem, Jiahui Zhang, Yu Zou
Summary: The study found that the flowability of metal powders is significantly influenced by PSD, with larger particle size or narrower PSD enhancing flowability, and multimodal distribution benefiting bulk flow properties. Additionally, powder rheology improves with larger particle size, and dynamic flowability is mainly influenced by particle mean size.
Article
Materials Science, Ceramics
Anabel Renteria, Luisa F. Garcia, Victor H. Balcorta, Dayna Ortiz, Luis C. Delfin, Jaime Regis, Mariana Marcos-Hernandez, David Espalin, Tzu-Liang (Bill) Tseng, Yirong Lin
Summary: Barium titanate is a lead-free piezoelectric ceramic widely used in sensors and actuators. Utilizing bimodal particle distribution in 3D printing can improve the density and piezoelectric properties of ceramics. Experimental results show that the 50-50% volume fraction of bimodal particles achieves the highest packing density and piezoelectric coefficient.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Justin G. Whiting, Edward J. Garboczi, Vipin N. Tondare, John Henry J. Scott, M. Alkan Donmez, Shawn P. Moylan
Summary: The particle size distribution and morphology of metal powders play a crucial role in the quality of 3D printed parts. Accurate understanding of these parameters is important. This study compares different measurement techniques and provides insight into the discrepancies among them using XCT data.
Article
Metallurgy & Metallurgical Engineering
Xin-xin Yao, Jian-yu Li, Yi-fei Wang, Xiang Gao, Zhao Zhang
Summary: The integrated simulation of powder effects on particle temperature and microstructural evolution in laser directed energy deposition additive manufacturing process was carried out. The study found that a narrow particle size distribution leads to a more uniform temperature distribution on the deposited layers and smaller equiaxed grains near the side surfaces of the sample. Additionally, appropriate powder particle size is beneficial for converting electromagnetic energy into heat and forming equiaxed grains to improve product quality.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Engineering, Chemical
Yi He, Ali Hassanpour, Andrew E. Bayly
Summary: This paper presents a particle-scale study on the spreading of cohesive fine powders, revealing the effects of particle size and surface cohesiveness on spreading performance. The study identifies critical powder descriptors for defining spreading performance.
Article
Materials Science, Multidisciplinary
Hussain Ali Murtaza, Aishabibi Mukhangaliyeva, Boris Golman, Asma Perveen, Didier Talamona
Summary: This study quantitatively characterizes the particle size distribution, morphology, and flowability of commonly used metal powders in additive manufacturing, and analyzes their correlations with powder rheological properties.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Ceramics
Chuchu Qian, Kehui Hu, Haoyuan Wang, Lei Nie, Qian Feng, Zhigang Lu, Peijie Li, Kuan Lu
Summary: This study investigated the influence of particle size distribution on SL-manufactured alumina ceramics, revealing that finer particle sizes have a greater impact on sintering degree, flexural strength, and porosity. The difference in particle size distribution had a significant influence on the properties when reaching a 10-fold difference.
CERAMICS INTERNATIONAL
(2022)
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
Engineering, Industrial
Patrick Fischmann, Fionn Schrauth, Frederik Zanger
Summary: This study analyzes the potential of high output powder in additive manufacturing, which offers significant advantages in terms of resource efficiency and reducing surface roughness compared to traditional methods.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Chemical
Daniel Oropeza, Ryan W. Penny, Daniel Gilbert, A. John Hart
Summary: This study demonstrates the use of a precision, mechanized powder spreading testbed coupled with transmission x-ray imaging for spatially-resolved, non-contact powder layer density measurements. The influence of several variables on the spreading of aluminum oxide powders is studied, including powder size and shape, spreading tool choice, traverse speed, and powder dispensing methodology. The findings show that these factors have an impact on the layer density of the spread powder.
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Engineering, Chemical
Eric Gaertner, Hyo Yun Jung, Nicolas J. Peter, Gerhard Dehm, Eric A. Jaegle, Volker Uhlenwinkel, Lutz Maedler
Summary: Adding nanosized SiO2 to gas-atomized CoCrFeNi powders can improve flowability and bulk density, with a reduction in dynamic angle of repose and an increase in powder density observed. However, the effect of nanoparticle concentration, mixing time, and Bond-number on powder flowability and porosity should be carefully considered in the additive manufacturing process.
Article
Engineering, Chemical
Zhenglong Lei, Shibo Wu, Meng Jiang, Jingwei Liang, Bingwei Li, Yanbin Chen
Summary: This study combines experiments and simulation to systematically investigate powder spreading dynamics, introducing an experimental calibration method for powder layer height and blade geometry. The study identifies the contributions to packing density fluctuations from various factors and establishes the importance of long-duration jamming events for the formation of empty patches. The results provide insights for optimizing particle packing and support subsequent modeling of laser-material interaction and melt pool dynamics.
Article
Materials Science, Multidisciplinary
Fuhui Cui, Junjie Wang, Xiangdong Gan, Dawei Yu, Ilya Vladimirovich Okulov, Qinghua Tian, Xueyi Guo
Summary: Liquid Mg can quickly erode refractory Ni-based superalloys, selectively dissolve Ni, and open up a new pathway for comprehensive metal reclamation of superalloy scraps. Higher heating temperatures substantially increase the dealloying rate, as shown by the experimental results.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Hassaan A. Butt, Ilya V. Novikov, Dmitry V. Krasnikov, Artem V. Sulimov, Amit K. Pal, Stanislav A. Evlashin, Anton M. Vorobei, Yaroslav I. Zuev, Dmitry Ostrizhiniy, Dmitry Dzhurinskiy, Yuri A. Popov, Olga O. Parenago, Albert G. Nasibulin
Summary: In this work, pre-consolidated form of single-walled carbon nanotubes (SWCNT) - SWCNT briquettes - are proposed as a material for manufacturing electrically and thermally conductive thermoset nanocomposites. The briquettes provide similar performance to other forms of SWCNTs in the nanocomposites, with low percolation thresholds. Compared to other forms of SWCNTs, the pre-consolidated briquettes have lower cost and better dispersibility, making them suitable for large scale production and small scale laboratories.
Article
Biochemical Research Methods
Nataliya R. Rovnyagina, Gleb S. Budylin, Pavel Dyakonov, Yuri M. Efremov, Marina M. Lipina, Yuliya R. Goncharuk, Emirkhan E. Murdalov, David A. Pogosyan, Denis A. Davydov, Alexander A. Korneev, Natalia B. Serejnikova, Karen A. Mikaelyan, Stanislav A. Evlashin, Vladimir A. Lazarev, Alexey Lychagin, Peter S. Timashev, Evgeny A. Shirshin
Summary: This study utilized diffuse reflectance spectroscopy in the NIR range to detect early stages of osteoarthritis and assess the damage grades and mechanical properties of cartilage.
JOURNAL OF BIOPHOTONICS
(2023)
Article
Automation & Control Systems
Marina O. Gushchina, Yulia O. Kuzminova, Oleg N. Dubinin, Stanislav A. Evlashin, Arthur M. Vildanov, Olga G. Klimova-Korsmik, Gleb A. Turichin
Summary: In this study, a multilayer titanium composite was produced using laser direct energy deposition, showing improved mechanical properties and impact toughness. This development has practical significance for the advancement of new materials.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Timur Chepiga, Petr Zhilyaev, Alexander Ryabov, Alexey P. Simonov, Oleg N. Dubinin, Denis G. Firsov, Yulia O. Kuzminova, Stanislav A. Evlashin
Summary: In this study, we investigated the parameter optimization for the laser powder bed fusion process using state-of-the-art multi-objective Bayesian optimization. With efficient sampling in the design space, we obtained three points in the Pareto front in just over six iterations. The produced parts had a hardness ranging from 224-235 HV and a porosity in the range of 0.2-0.37%.
Article
Microscopy
Yulia O. Kuzminova, Denis G. Firsov, Anastasia A. Shibalova, Stanislav A. Evlashin, Igor V. Shishkovsky, Stanislav S. Dautov
Summary: By evaluating the oxidation resistance of high-entropy alloys (HEAs) at different temperatures, it is found that the formation of Al2O3 layer in HEAs can prevent the delamination of the oxide scale and enhance the oxidation resistance. The addition of Al element leads to the formation of AlN, further improving the oxidation resistance of the material.
Article
Chemistry, Physical
Nicole Mensching, Mirja Louisa Krueger, Askar Kvaratskheliya, Daniel Meyer, Kirsten Tracht, Ilya Okulov, Lutz Maedler
Summary: Maintenance and repair on Mars is crucial due to complex supply chains and the need to process and use raw materials available on Mars. This paper focuses on the challenge of low-energy handling in the development of a process chain for producing spare parts from Mars regolith. Dry-adhesive microstructures and deep-rolling techniques are investigated to smooth the rough surface of additive manufactured samples and enable their transportation. Significant improvements in pull-off stresses are achieved, making it possible to handle larger specimens.
Article
Polymer Science
Julia V. Bondareva, Daniil A. Chernodoubov, Oleg N. Dubinin, Andrey A. Tikhonov, Alexey P. Simonov, Nikolay V. Suetin, Mikhail A. Tarkhov, Zakhar I. Popov, Dmitry G. Kvashnin, Stanislav A. Evlashin, Alexander A. Safonov
Summary: The efficiency of electronic devices increases with advancements in technology, but their miniaturization leads to overheating issues. This paper focuses on the use of polymer-boron nitride composite materials for efficient heat dissipation. 3D printing with digital light processing is utilized to create a model of a composite radiator with different boron nitride fillings. The results show potential applications of these additive manufactured composite materials in modern electronics.
Article
Materials Science, Multidisciplinary
Yangping Dong, Dawei Wang, Qizhen Li, Xiaoping Luo, Jian Zhang, Konda Gokuldoss Prashanth, Pei Wang, Jurgen Eckert, Lutz Madler, Ilya V. Okulov, Ming Yan
Summary: In this study, strong and ductile pure Ti was synthesized via a reactive additive manufacturing method. The Ti was processed using laser powder bed fusion in an environment containing a mixture of argon and nitrogen gases. The presence of a nitrogen solid solution led to the formation of high-strength pure Ti with excellent uniform elongation, due to strong work hardening caused by the interaction of interstitial elements and submicrostructure. This reactive additive manufacturing approach opens up possibilities for in-situ strengthening of pure metals and alloys.
MATERIALS TODAY ADVANCES
(2023)
Article
Engineering, Multidisciplinary
Alexey A. Pcheliakov, Ekaterina Yu. Diachkova, Yuriy L. Vasil'ev, Oxana A. Svitich, Alexander V. Poddubikov, Stanislav A. Evlashin, Beatrice A. Volel, Anastasia A. Bakhmet, Svetlana V. Klochkova, Ellina V. Velichko, Natalia Tiunova, Svetlana V. Tarasenko
Summary: The purpose of this study was to compare the mechanical properties and microbiological resistance of mono- and polyfilament suture materials used in tooth extraction operations. Results showed that monofilament suture materials performed better in all experiments and absorbed fewer bacteria compared to polyfilament sutures. Prolene monofilament suture material had the best microbiological resistance and good mechanical properties.
Article
Nanoscience & Nanotechnology
Sunil Kumar, Veronika A. Dmitrieva, Gang Meng, Stanislav A. Evlashin, Ekaterina V. Sukhanova, Dmitry G. Kvashnin, Zakhar I. Popov, Alexander G. Bannov, Fedor S. Fedorov, Albert G. Nasibulin
Summary: We improved the sensitivity of NO2 analyte by adjusting the width ratio of adjacent graphene oxide (GO) and reduced graphene oxide (rGO) layers using GO laser reduction technique. The reduction of GO led to a chemiresistive response to NO2, and an optimum GO/rGO width ratio achieved a chemiresistive response of 18.1% towards 100 ppm of NO2 with a limit of detection of 230 ppb. The enhanced chemiresistive response of GO/rGO sensors to NO2 physisorption was attributed to increased sorption energy and improved charge transfer at the GO/rGO interface area compared to fully reduced GO.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yulia O. Kuzminova, Denis G. Firsov, Anastasia A. Shibalova, Egor A. Kudryavtsev, Pavel Krakhmalev, Olga G. Klimova-Korsmik, Igor V. Shishkovsky, Stanislav A. Evlashin
Summary: High-entropy Alloys (HEAs) are promising materials for harsh conditions and additive manufacturing (AM) can be used for adjusting their composition. In this study, CrFeCoNi(Al,Ti) HEAs were printed by powder bed fusion (PBF) using a blend of three powders. The investigation revealed chemical inhomogeneity and phase formations in the printed alloys, which can be influenced by post-treatment processes such as high-temperature annealing.
Article
Materials Science, Multidisciplinary
Stanislav A. Evlashin, Yulia O. Kuzminova, Alexey P. Simonov, Denis G. Firsov, Oleg N. Dubinin, Oleg A. Rogozin, Mikhail V. Perevozchikov, Iskander S. Akhatov
Summary: Laser powder bed fusion technology allows for the production of complex shapes in various alloys and the manipulation of material composition to improve properties. By adding boron, the microhardness and ultimate tensile strength of 316L stainless steel can be significantly improved, making it suitable for tool printing.
