Article
Chemistry, Physical
Yuanling Zhang, Lei Yang, Lin Yu, Junyi Ma, Jie Liu
Summary: This paper mainly studies the LPBF process optimization of Ni-Ti-Zr ternary alloy and reveals the evolution of microstructure, phase transformation behavior, and mechanical properties in LPBF-formed Ni-Ti-based shape memory alloy. The optimized process window range is determined to be 45-80 J/mm3 with the highest relative density of 98.89% under specific laser power, scanning speed, and preheat temperature. The addition of Zr significantly increases the phase transformation temperature and thermal hysteresis of Ni-Ti-Zr alloy, which broadens its application under high-temperature conditions and provides a theoretical reference for LPBF forming of high-performance nickel-titanium-based shape memory alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Qin Zou, Xihui Ye, Yanguo Li, Wenqi Luo, Xiaowei Yang, Yongan Luo
Summary: The effects of Ti on the microstructure and properties of the Fe-20Mn-6Si-8Cr-5Ni shape memory alloy prepared by powder metallurgy were investigated. The results showed that trace Ti elements could improve the alloy's mechanical properties and shape memory performance, but an excess of Ti had adverse effects. The Ti content also played a role in the corrosion resistance of the alloy.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Jessica Dornelas Silva, Gisele Fernandes Chaves Macieira, Dilson Silva dos Santos, Leandro de Arruda Santos, Vicente Tadeu Lopes Buono
Summary: Ti52-xNi38Cu10Nbx alloys with Nb additions were produced and their phase constitution and morphology were investigated. The study demonstrated the importance of metastable phases and Nb content in the solidification sequence, phase distribution, and morphology of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Automation & Control Systems
Jianran Lv, Hongyao Shen, Jianzhong Fu
Summary: The study successfully fabricated multi-functional Ni-Ti alloys using laser powder bed fusion (LPBF) method, by sequentially manufacturing super-elasticity and shape memory effect parts with Ni-rich and Ti-rich powders, respectively. Tensile tests were conducted on integrated components to select the sample with the highest ultimate tensile strength at a relatively low energy density for further analysis of microstructure and transformation temperature, confirming LPBF as a suitable method for fabricating multi-functional Ni-Ti alloys.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
S. Xu, J. Pons, R. Santamarta, I Karaman, O. Benafan, R. D. Noebe
Summary: This study reports the existence of a strain glass state induced by the precursor stages of H-phase precipitation in Ni-Ti-Zr shape memory alloys, with superelastic effect observed in compression. The material exhibits recoverable strain levels over 4% with little temperature dependence of the stress-strain curves.
Article
Materials Science, Multidisciplinary
Chao Song, Shuai Ren, Shaohui Li, Shengwei Li, Guijun Liu, Zhihua Nie, Yandong Wang, Daoyong Cong
Summary: This study utilizes strain glass to improve the reversibility of phase transformation. The incorporation of Al into Ti-Zr-Ni-Cu induces strain glass and endows the alloy with reversible phase transformation and ideal superelasticity.
MATERIALS RESEARCH LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Shaohui Li, Daoyong Cong, Wenxin Xiong, Zhen Chen, Xin Zhang, Zhihua Nie, Shengwei Li, Runguang Li, Youkang Wang, Yuxian Cao, Yang Ren, Yandong Wang
Summary: In this study, a low-cost high-performance polycrystalline high-temperature shape memory alloy with extraordinary high-temperature superelasticity and a giant two-way shape memory effect has been developed. This alloy has the highest recoverable strain of superelasticity and two-way shape memory strain among bulk polycrystalline HTSMAs, showing great potential for high-temperature shape memory applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Biophysics
Anton S. Konopatsky, Tatyana O. Teplyakova, Daria Popova, Kseniya Yu Vlasova, Sergey D. Prokoshkin, Dmitry Shtansky
Summary: The study demonstrates that surface modification of advanced superelastic Ti-based alloys with Ag nanoparticles can result in materials with excellent bactericidal properties. This surface treatment led to the formation of a porous surface layer with superior antibacterial activity.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Chemistry, Physical
M. Perez-Cerrato, B. Maass, M. L. No, J. M. San Juan
Summary: The martensitic transformation of Ni49.5Ti35.5Hf15 high temperature shape memory alloy was characterized by internal friction measurements, revealing reversible B2 <-> B19' transformations and anomalous pre-martensitic softening in the high-temperature phase. A new method for measuring the Clausius-Clapeyron coefficient through mechanical spectroscopy, based on internal friction spectra analysis, was proposed for non-destructive testing and potential development of advanced prototypes of shape memory alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Wenjia Wang, Yuanchao Ji, Minxia Fang, Dong Wang, Shuai Ren, Kazuhiro Otsuka, Yunzhi Wang, Xiaobing Ren
Summary: In this work, a systematic study of a reentrant strain glass transition in a Ti50Ni34Cu16 shape memory alloy is reported. The transition is characterized by temperature invariance, deviation in heat flow and resistivity curves, frequency-dependent behavior, and a peak in a zero-field cooling curve. In-situ microstructural observations reveal the unchanged B19 martensitic domain pattern and the emergence of nanodomains with local 4H symmetry. A new phase diagram is established based on experimental results, which helps understand the formation of the reentrant strain glass. The study predicts the presence of more unusual properties in reentrant strain glass materials.
Article
Materials Science, Multidisciplinary
D. Katrakova-Krueger, L. Pegoraro, L. Salmaso, C. Hartl, I. Schulz, S. Weichert, R. Steffen
Summary: Ni-Ti alloys have a wide range of applications and possess great potential for innovative smart products due to their shape memory effect and superelasticity. However, forming and machining these alloys into concrete products is challenging. Laser welding of Ni55/Ti45 foil with a thickness of 125 μm was investigated and optimal parameters were determined. The effect of laser beam oscillation on this alloy was also studied, and the microstructure and mechanical characteristics of the welded joints were analyzed.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Crystallography
Victor Komarov, Roman Karelin, Irina Khmelevskaya, Vladimir Yusupov, Dmitry Gunderov
Summary: This study investigated the effect of post-deformation annealing on a nickel-enriched Ti-Ni shape memory alloy. The results showed that the annealing process led to the precipitation of finely dispersed Ti3Ni4 particles and significantly improved the alloy's recoverable strain and shape recovery rate.
Article
Materials Science, Multidisciplinary
Hao Li, Kuishan Sun, Xianglong Meng, Wei Cai, Liancheng Zhao
Summary: Recently, the isothermal martensitic transformation in shape memory alloys (SMAs) has been investigated, but the underlying mechanisms are still not fully understood. In this study, the isothermal transition from B2 to B19 was confirmed in Ti-Ni-Cu-Co melt-spun ribbons. A thermally activated kinetic model was developed to characterize the kinetics and it agreed well with the experimental results. It was found that the nucleation density and activation energy played important roles in the isothermal transition.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Review
Construction & Building Technology
Iman Abavisani, Omid Rezaifar, Ali Kheyroddin
Summary: Shape memory materials (SMMs) are widely used in civil engineering due to their unique ability to memorize their original shape and return to it under stimuli. These materials, including shape memory alloys, magnetic shape memory alloys, shape memory polymers, and shape memory ceramics, have multifunctional properties and can be applied in various systems.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Chemistry, Physical
Natalia Resnina, Sergey Belyaev, Aleksei Sibirev, Irina Ponikarova, Aleksei Ivanov, Rashid Bikbaev, Timofei Rebrov, Maria Starodubova, Sofia Berezovskaya, Miroslava Kalnitskaya, Andrey Bazlov, Vladimir Andreev, Vladimir Kalganov
Summary: Twelve senary alloys with different concentrations of doping elements were manufactured, and it was found that the concentration of doping elements affected the lattice parameter and the chemical composition of the alloys. The alloys exhibited a B2 phase regardless of entropy value, and the formation of strain nanodomains and the martensitic transformation were influenced by the concentration of doping elements and the Ni group concentration. The type of secondary phase depended on the Ni concentration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Sergey Blagodarov, Galina A. Zheltukhina, Yuliya M. Romanova, Natalia Alekseeva, Lyudmila D. Iskhakova, Maria Semashko, Eteri R. Tolordava, Vladimir E. Nebolsin
Summary: The emergence of antibiotic-resistant bacterial strains has led to the focus on designing new antimicrobial agents. This study aimed to improve the synthesis of two compounds (HD) and determine their antimicrobial and destructive effects on biofilms, including those consisting of resistant bacteria.
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2022)
Article
Optics
S. Shelygina, V Kompanets, E. Tolordava, S. Gonchukov, S. Chekalin, S. Kudryashov
Summary: Dynamic optical density spectra were obtained by exciting bacterial cultures with mid-infrared ultrashort laser pulses. The spectra showed laser intensity-dependent blue spectral shift, which is presumably related to the protein structures of the bacterial cells.
LASER PHYSICS LETTERS
(2022)
Article
Optics
Alena Nastulyavichus, Sergey Kudryashov, Etery Tolordava, Andrey Rudenko, Demid Kirilenko, Sergey Gonchukov, Andrey Ionin, Yulia Yushina
Summary: In this study, colloidal solutions of silver nanoparticles were synthesized by laser ablation of silver films in water. The properties of these particles were characterized using various techniques, and it was found that the extinction coefficient and diameter of the colloidal particles increased with laser fluence and exposure. The antibacterial properties of the silver nanoparticles were also investigated.
LASER PHYSICS LETTERS
(2022)
Article
Optics
I. N. Saraeva, D. A. Zayarny, E. R. Tolordava, A. A. Nastulyavichus, L. F. Khaertdinova, S. Kudryashov, Y. S. Zhizhimova, A. A. Ionin, S. A. Gonchukov
Summary: Magnetron-sputtered metal nanostructured films on semiconductor substrate exhibit high antibacterial effect against food pathogens. The effect is attributed to the emergence of static electric and magnetic fields, causing voltage drops, which induce membrane hyperpolarization, electroporation, and subsequent apoptosis of bacterial cells. Additional factors such as volume convection and electro-taxis enhance the antibacterial effect.
LASER PHYSICS LETTERS
(2022)
Article
Engineering, Chemical
Sergey Belov, Yury K. Danileiko, Alexey B. Egorov, Vladimir Lukanin, Anastasia A. Semenova, Andrey B. Lisitsyn, Natalia M. Revutskaya, Victoria V. Nasonova, Yulya K. Yushina, Etery R. Tolordava, Nazarbay A. Nasyrov, Alena Sinichkina, Eugeny M. Konchekov, Tatyana A. Matveeva, Sergey Gudkov
Summary: The development of non-thermal sterilization methods for ensuring the safety of meat industry products is an urgent task. In this study, a knife sterilization device that activates salt solutions with a glow discharge was created. The device effectively inactivated various bacteria on stainless steel surfaces.
Article
Polymer Science
Kristina Mkrtchyan, Vladislava A. Pigareva, Elena A. Zezina, Oksana A. Kuznetsova, Anastasia A. Semenova, Yuliya K. Yushina, Etery R. Tolordava, Maria A. Grudistova, Andrey Sybachin, Dmitry Klimov, Sergey S. Abramchuk, Alexander A. Yaroslavov, Alexey A. Zezin
Summary: In this study, metallopolymer nanocomposites containing silver ions were successfully synthesized for the preparation of biocidal coatings. By adjusting the composition of the system, the size of silver nanoparticles and antibacterial properties can be controlled. These synthesized nanocomposites show promising potential in antibacterial activity.
Article
Biochemistry & Molecular Biology
Sergey V. Gudkov, Ruibin Li, Dmitriy A. Serov, Dmitriy E. Burmistrov, Ilya V. Baimler, Alexey S. Baryshev, Alexander V. Simakin, Oleg V. Uvarov, Maxim E. Astashev, Natalia B. Nefedova, Sergey Y. Smolentsev, Andrey V. Onegov, Mikhail A. Sevostyanov, Alexey G. Kolmakov, Mikhail A. Kaplan, Andrey Drozdov, Eteri R. Tolordava, Anastasia A. Semenova, Andrey B. Lisitsyn, Vasily N. Lednev
Summary: Foodborne infections are a major global health problem with high prevalence and severe complications. Bacterial contamination during meat processing can cause foodborne infections, and antibacterial coatings can be used to prevent it. In this study, a composite coating based on fluoroplast and Ag2O NPs was developed for the first time. The coating showed excellent antibacterial properties against both Gram-positive and Gram-negative bacteria, without affecting the viability of eukaryotic cells. This coating could be used to protect cutting boards from bacterial contamination in the meat processing industry.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Optics
A. A. Nastulyavichus, N. A. Smirnov, L. F. Khaertdinova, E. R. Tolordava, Yu K. Yushina, A. A. Rudenko, A. A. Ionin, S. Kudryashov, S. A. Gonchukov
Summary: In this study, a typical food industry material, stainless steel, was laser-textured to investigate the biofouling of model surface relief. Both initial and laser-textured surfaces were examined using various methods to identify the key factors contributing to their biofouling by food pathogen bacteria.
LASER PHYSICS LETTERS
(2022)
Article
Chemistry, Analytical
Alena Nastulyavichus, Liliana Khaertdinova, Eteri Tolordava, Yulia Yushina, Andrey Ionin, Anastasia Semenova, Sergey Kudryashov
Summary: Additive laser-induced forward transfer (LIFT) is an efficient method for transferring metal bactericidal nanoparticles onto food bacterial biofilms, demonstrating significant antibacterial effects against pathogenic microorganisms.
Article
Chemistry, Multidisciplinary
Dmitriy A. A. Serov, Dmitriy E. E. Burmistrov, Alexander V. V. Simakin, Maxim E. E. Astashev, Oleg V. V. Uvarov, Eteri R. R. Tolordava, Anastasia A. A. Semenova, Andrey B. B. Lisitsyn, Sergey V. V. Gudkov
Summary: Coating surfaces with a composite material of liquid Teflon and zinc oxide nanoparticles can effectively inhibit bacterial contamination during meat processing, while reducing cytotoxic effects on cells.
Article
Biochemistry & Molecular Biology
Irina Saraeva, Eteri Tolordava, Svetlana Sheligyna, Alyona Nastulyavichus, Roman Khmelnitskii, Nikolay Pokryshkin, Dmitriy Khmelenin, Sergey Kudryashov, Andrey Ionin, Andrey Akhmatkhanov
Summary: This study reports the successful inactivation of P. aeruginosa strain using femtosecond infrared (IR) laser radiation at resonant wavelengths of 3.15 mu m and 6.04 mu m. These wavelengths were chosen due to characteristic molecular vibrations in the main structural elements of the bacterial cells. The structural molecular changes were revealed using stationary Fourier-transform IR spectroscopy, and no visible damage to cell membranes was identified through electron microscopy.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Alena Nastulyavichus, Eteri Tolordava, Sergey Kudryashov, Roman Khmelnitskii, Andrey Ionin
Summary: In this study, copper and silver nanoparticles were synthesized with a concentration of 20 μg/cm² using laser-induced forward transfer (LIFT) method. The nanoparticles showed antibacterial activity against bacterial biofilms formed by mixed-species bacteria, including Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa. The Cu nanoparticles completely inhibited the formation of biofilms, reducing the bacteria concentration by 5-8 orders of magnitude. The antibacterial activity was confirmed using the Live/Dead Bacterial Viability Kit, and FTIR spectroscopy revealed changes in fatty acids after Cu NP treatment.
Article
Physics, Multidisciplinary
D. A. Zayarnyi, E. R. Tolordava, A. A. Ionin, S. Kudryashov, A. A. Nastulyavichus, L. F. Khaertdinova, N. Busleev, S. N. Shelygina
Summary: For the first time, antibacterial properties were detected in laser-beam nanostructured metal films deposited on single-crystal silicon wafers when applying a weak electric field not higher than 6.5 V. The presence of a periodic variable resistivity profile on the structure surface and a metal-semiconductor junction (Schottky barrier) were found to control these properties.
BULLETIN OF THE LEBEDEV PHYSICS INSTITUTE
(2022)
Article
Physics, Multidisciplinary
V. O. Kompanets, S. Kudryashov, E. R. Totordava, S. N. Shelygina, V. V. Sokolova, I. N. Saraeva, M. S. Kovalev, A. A. Ionin, S. Chekalin
Summary: The research studied the transmission spectra of femtosecond laser pulses in the region of characteristic absorption bands of proteins and lipids on a silicon plate, focusing on submonolayers of Staphylococcus aureus and Pseudomonas aeruginosa bacteria. The samples exhibited invertible translucence and blue shift in the bacteria characteristic bands, indicating the destruction of hydrogen bonds. The study also discussed the potential inactivation of pathogenic bacteria through selective IR laser denaturation of functional proteins by resonance irradiation of low average power.
