Article
Materials Science, Multidisciplinary
Mohammad Rezaei Ardani, Sheikh Abdul Rezan Sheikh Abdul Hamid, Abdul Rahman Mohamed
Summary: This study introduces a novel method for synthesizing titanium hydride powder from ilmenite at low temperature through a series of reactions. The results show that longer reaction time and higher temperature enhance the production of titanium hydride powder.
Article
Materials Science, Multidisciplinary
Qipeng Bao, Yiru Yang, Xiaochun Wen, Lei Guo, Zhancheng Guo
Summary: This paper presents a novel technology using high-temperature remelting spheroidization (HRS) to prepare spherical metal powders, with a focus on copper powder spheroidization. The results show unique advantages of HRS technology in producing perfect spherical metal powders with improved fluidity.
MATERIALS & DESIGN
(2021)
Article
Thermodynamics
Zhi-Jian Li, Zhi-Heng Xiao, Hai-Liang Zhang, Hong-Liang Dai, Wei-Feng Luo, Zheng-Wei Huang
Summary: A coupled thermo-mechanical model of titanium alloy parts in the powder bed fusion process is developed, taking into account the process-induced interfacial lack of fusion and pores. The equivalent temperature-dependent thermal properties of the parts with defects are calculated based on mixture theory, and the three-dimensional thermal, mechanical, and displacement fields are predicted using the differential quadrature method. The predicted results demonstrate the significant influence of process and geometry parameters on the temperature distribution, residual stress buildup, and deformation of the printed parts.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Nanoscience & Nanotechnology
Herbert Canziani, Frederik Bever, Alexander Sommereyns, Michael Schmidt, Nicolas Vogel
Summary: The study demonstrates a process of designing polymer and composite supraparticle powders with excellent flowability and tailored composition. By assembling powders from the bottom up and selecting suitable colloidal primary particles, precise control over surface roughness and internal morphology can be achieved. These prepared powders have optimized flowability and can be used in powder bed additive manufacturing for producing various structures.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Jae-Kap Jung, Kyu-Tae Kim, Nak-Kwan Chung, Un-Bong Baek, Seung-Hoon Nahm
Summary: A method for characterizing permeation parameters in hydrogen sorption and desorption processes in polymers using the volumetric measurement technique was developed. The study provided insight into the parameters in different polymers and confirmed the relationship between saturation time and polymer diameter. This method can predict the equilibrium time of sorption without the need for actual measurements.
Article
Engineering, Manufacturing
M. Tarik Hasib, Halsey E. Ostergaard, Qian Liu, Xiaopeng Li, Jamie J. Kruzic
Summary: The study compared the effects of build orientation and post heat treatments on the tensile and fatigue crack growth behavior of titanium alloys, revealing that heat treatments altered grain structure, affecting tensile strength and fatigue crack growth threshold; titanium alloys manufactured using laser powder bed fusion were generally stronger and more fatigue resistant than wrought materials.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Liesbet Deconinck, Maria T. Villa Vidaller, Elena Bernardo Quejido, Eric A. Jaegle, Tom Depover, Kim Verbeken
Summary: This study investigates the hydrogen embrittlement of Ti-6Al-4V titanium alloy processed by different manufacturing methods. The susceptibility to hydrogen embrittlement is determined by the microstructure. In-situ electrochemical hydrogen charging tests and various analytical techniques are used to examine the mechanical characteristics and microstructural interactions with hydrogen. The presence of the beta phase increases the hydrogen uptake capacity and enhances the susceptibility to hydrogen embrittlement.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Biomedical
Cambre N. Kelly, Tian Wang, James Crowley, Dan Wills, Matthew H. Pelletier, Edward R. Westrick, Samuel B. Adams, Ken Gall, William R. Walsh
Summary: The optimization of porous titanium alloy scaffolds for orthopedic implants involves balancing mechanical properties and osseointegrative performance. Research findings suggest a complex relationship between scaffold porosity and performance, with a linear relationship observed between porosity and benchtop mechanical properties, and a non-linear relationship observed between porosity and ex vivo cortical bone-implant interfacial shear strength.
Article
Engineering, Mechanical
Rhys Jones, Jeff Lang, Vahram Papyan, Daren Peng, Jim Lua, Andrew Ang
Summary: This paper reveals that commercially pure (CP) Titanium has superior corrosion resistance, fracture toughness, and fatigue crack growth resistance compared to commonly used aluminum alloy AA7050-T7451. CP Titanium may be an attractive option for replacement parts in aircraft and unmanned aerial vehicles (UAV's).
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
Thomas Childerhouse, Everth Hernandez-Nava, Nikolaos Tapoglou, Rachid M'Saoubi, Luiz Franca, Wayne Leahy, Martin Jackson
Summary: This study found that removing defects during machining can significantly improve fatigue performance in metal additive manufactured components, while hot isostatic pressing treatment can effectively reduce gas porosity to a lesser degree than machining.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Chemical
Qipeng Bao, Lei Guo, Tao Qi, Zhancheng Guo
Summary: In this paper, a novel flash remelting spheroidization (FRS) method was used to prepare high-quality spherical metal powder. The experimental results show that this method can significantly improve the sphericity of the powder and avoid the defects in conventional methods.
Article
Engineering, Manufacturing
Cambre N. Kelly, C. Kahra, Hans J. Maier, Ken Gall
Summary: The study establishes relationships between post-processing, microstructure, and resulting fatigue properties for gyroid-sheet scaffolds with as-fabricated surfaces. Despite the inherent surface roughness of L-PBF, the gyroid-sheet scaffolds show high compressive fatigue strength, exceeding 50% after surface treatments, making them desirable for biomedical applications.
ADDITIVE MANUFACTURING
(2021)
Article
Chemistry, Physical
Jing He, Qian Liu, Minglin He, Jiaxing Li, Shuai Wang
Summary: This study investigated the mechanism of hydrogen embrittlement in Ni fabricated by laser-based powder bed fusion. In the presence of hydrogen, the Ni failed in a brittle mode with a transgranular-like fracture surface. This unusual fracture morphology is caused by the special grain shape induced by the laser-based manufacturing process, and the failure process is mainly attributed to intergranular decohesion. Annealing of the printed sample improved its elongation and mitigated hydrogen embrittlement. The dislocation cellular pattern formed in additive manufacturing is considered detrimental to hydrogen embrittlement resistance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Young Il Kim, Dae-Kyeom Kim, Dongju Lee, Taek-Soo Kim, Young Do Kim, Bin Lee
Summary: By changing the surface characteristics of HDH Ti powder from hydrophilic to hydrophobic using silane-based chemicals, the spreadability of the powder can be improved. The study shows that this method can reduce the cost of HDH Ti powder and improve the spreadability of powder particles in additive manufacturing.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Z. Liu, T. Chen, W. S. Cai, H. Z. Lu, Z. C. Lu, D. Wang, X. Q. Li, X. Y. Zhang, C. Yang
Summary: In this study, a discharge plasma modification method is used to treat recycled titanium powder, resulting in the production of high-performance titanium alloy materials. This provides an inexpensive and sustainable approach for manufacturing high-performance metallic components via laser powder bed fusion.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Ceramics
E. B. Kashkarov, D. G. Krotkevich, Y. R. Mingazova, N. S. Pushilina, M. S. Syrtanov, A. M. Lider, N. Travitzky
Summary: This paper describes the fabrication and characterization of novel functionally graded materials (FGMs) based on Ti3(Si,Al)C2 MAX phase derived from preceramic paper. The FGMs exhibit high flexural strength and corrosion resistance, which are influenced by microstructure, composition, and architecture. The results suggest that the texturing of MAX phase grains and the composition gradient in FGMs contribute to their anisotropic hardness and improved corrosion resistance.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Coatings & Films
M. S. Syrtanov, E. B. Kashkarov, A. Abdulmenova, D. Sidelev
Summary: The oxidation and interdiffusion behavior of Cr- and Cr/Mo-coated Zr-1Nb zirconium alloy were investigated. Both types of coating showed a protective scale during high-temperature oxidation, and the use of Mo sublayer prevented interdiffusion between Cr and Zr.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
D. V. Sidelev, S. E. Ruchkin, M. S. Syrtanov, E. B. Kashkarov, I. A. Shelepov, A. G. Malgin, K. K. Polunin, K. V. Stoykov, A. A. Mokrushin
Summary: In this study, Cr coatings with CrN/Cr multilayers were deposited on E110 zirconium alloy by multi cathode magnetron sputtering, and their mechanical properties and oxidation resistance were evaluated. The results showed that the multilayers could only limit the interdiffusion between the coating and alloy for a short period at high temperatures.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Jinzhe Lyu, Roman R. Elman, Leonid A. Svyatkin, Viktor N. Kudiiarov
Summary: The study of Mg-based thin films for hydrogen storage is important for their unique composition, interface, crystallinity, and potential in hydrogen-storage systems. Alloying Mg with Al destabilizes the magnesium hydride, reducing heat of reaction, increasing nucleation rate, and lowering dehydriding temperature. This study investigates the role of aluminum atom addition in hydrogen adsorption and accumulation in Mg-H solid solution through ab initio calculations and experimental analysis.
Article
Chemistry, Physical
Iurii Bordulev, Roman Laptev, Viktor Kudiiarov, Roman Elman, Alexander Popov, Denis Kabanov, Ivan Ushakov, Andrey Lider
Summary: The current work focuses on developing a system for the complex research of metal-hydrogen systems, allowing in situ investigation of the defect structure of solids in hydrogen sorption-desorption processes. The system consists of a controlled gas reactor, a radioisotope positron source, and a positron annihilation spectroscopy complex.
Article
Chemistry, Physical
O. B. Perevalova, M. S. Syrtanov
Summary: The microstructure and phase composition of the EBAM Ti-6Al-4 V alloy samples during heating were studied using in situ high temperature synchrotron X-ray diffraction and transmission electron microscopy (TEM). The formation of a new α'' phase and the lattice distortion of the α phase were observed, and the dependence of phase composition on heating temperature was revealed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Chemistry, Physical
Jinzhe Lyu, Viktor Kudiiarov, Andrey Lider
Summary: With the increasing energy crisis and environmental problems, there is a need to find an efficient renewable energy source. Hydrogen energy is considered promising and magnesium can be a good hydrogen storage material. However, its slow kinetic performance has hindered practical applications.
Article
Chemistry, Physical
Jinzhe Lyu, Roman Elman, Leonid Svyatkin, Viktor Kudiiarov
Summary: This paper investigates the influence of hydrogen concentration on binding energies in magnesium hydrides. It is found that aluminum doping allows for a more uniform distribution of hydrogen in the magnesium lattice, which is energetically favorable and promotes faster hydrogen absorption. The phase transition in the aluminum-doped magnesium structure also induces less elastic strain compared to pure magnesium.
Article
Materials Science, Multidisciplinary
Maxim Syrtanov, Egor Kashkarov, Anastasia Abdulmenova, Kirill Gusev, Dmitrii Sidelev
Summary: The paper investigates the oxidation resistance of bilayer Cr/Mo coating deposited on Zr-1Nb zirconium alloy under LOCA conditions. The bilayer Cr (8 μm)/Mo (3 μm) coatings were prepared by magnetron sputtering and tested for high-temperature oxidation at 1200-1400 degrees C in water steam. The results show that the Mo sublayer effectively limits Cr-Zr interdiffusion under high-temperature oxidation and provides protective behavior for at least 720 s at 1330 degrees C in water steam.
Article
Materials Science, Multidisciplinary
Andrey A. Leonov, Yuliya A. Denisova, Vladimir V. Denisov, Maxim S. Syrtanov, Alexander N. Shmakov, Viktor M. Savostikov, Anton D. Teresov
Summary: The study investigated the properties of CrN/TiN multi-layer coatings as well as single-layer TiN and CrN coatings on Cr12MoV cold work die steel. Deposition of 8-, 16-, and 32-layers of CrN/TiN coatings with varying layer thicknesses resulted in a face-centered cubic structure and highly oriented (111) growth. The hardness of the CrN/TiN multi-layer coatings was approximately 27 GPa. Reducing the thickness of the CrN and TiN layers from 500 nm to 125 nm improved wear resistance and friction coefficient. X-ray phase analysis showed that the 32-layer CrN/TiN coating exhibited thermal stability up to 1120-1125 degrees C in air and at least 1200 degrees C in a vacuum.
Article
Materials Science, Multidisciplinary
Egor Kashkarov, Kirill Gusev, Viktor Kudiiarov, Nikita Kurdyumov, Dmitrii Sidelev
Summary: The hydrogenation behavior of Cr-coated resistance upset welds (RUW) of E110 zirconium alloy at different temperatures and hydrogen pressure was investigated. The deposition of Cr coating can decrease the hydrogen absorption rate of RUW Zr alloy. The Cr coating can limit the formation of radially oriented hydrides and the hardening of RUW specimens at lower temperatures.
Article
Materials Science, Multidisciplinary
A. E. Zhdanov, M. S. Syrtanov, N. E. Kurdyumov, T. L. Murashkina
Summary: The paper presents the characterization of the structure and sorption properties of Ti21.5V40Cr38.5 alloy synthesized by abnormal glow discharge plasma melting and arc melting. X-ray diffraction analysis revealed the presence of the main TiVCr phase with a body-centered cubic lattice and the Ti2O phase with a hexagonal close-packed lattice. The maximum hydrogen capacity of the samples synthesized by abnormal glow discharge plasma melting after 3 cycles was 3 wt%.
Article
Physics, Multidisciplinary
A. A. Nikolaev, A. Yu. Nazarov, K. N. Ramazanov, M. S. Syrtanov, A. M. Khusainova, A. A. Nikolaev, A. A. Nikolaev, E. L. Vardanyan
Summary: The paper presents an X-ray diffraction data analysis of heat-resistant coatings based on the Ti-Al-C and Y-Al-O systems. These coatings are deposited onto molybdenum substrates using cathodic-arc deposition with two single-component titanium and aluminum cathodes in a mixture of acetylene and argon gases. The analysis reveals that the deposited coatings have an amorphous structure. After annealing, the Ti2AlC MAX phase and Ti-Al intermetallic compounds are formed in the Ti-Al-C system, while the Y-Al-O system shows the formation of Y2O3, YAlO3, and Y4Al2O9 oxides.
RUSSIAN PHYSICS JOURNAL
(2023)
Article
Physics, Multidisciplinary
A. Yu. Nazarov, A. M. Khusainova, A. A. Maslov, K. N. Ramazanov, M. S. Syrtanov, A. A. Nikolaev, A. A. Tulina, E. L. Vardanyan
Summary: This paper presents the research results of Y-Al-O system-based coatings synthesized by cathodic-arc deposition from two electric-arc evaporators. The effects of annealing temperature and deposition mode on the phase composition of the coatings are investigated. The formation of YAlO3 phase is observed in all annealing modes, while more complex oxides appear at higher process temperatures. X-ray diffraction analysis shows that the coating acquires an amorphous structure, and scanning electron microscope study reveals diffusion in the base material after annealing at 1200 degrees C.
RUSSIAN PHYSICS JOURNAL
(2023)
Review
Chemistry, Physical
Jinzhe Lyu, Viktor Kudiiarov, Leonid Svyatkin, Andrey Lider, Kejie Dai
Summary: In this review, the catalytic mechanism of 3d and 4d transition metals (TM) on the hydrogen sorption properties of Mg/MgH2 is introduced. The relationship between the thermodynamic stability of the TM-substituted MgH2 system and interatomic interactions is discussed. The synergy effect between the electronegativity and the radius of the TM element is proposed as an explanation for the charge transfer process between TM and H in the TM-substituted MgH2 system.
