Review
Materials Science, Multidisciplinary
Hiba Azzeddine, Djamel Bradai, Thierry Baudin, Terence G. Langdon
Summary: This study focuses on the influence of various factors such as imposed strain, deformation temperature, and alloying elements on the crystallographic texture evolution in FCC, BCC, and HCP crystal structure materials processed exclusively by HPT.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
S. Hadi, F. Rahimzadeh Lotfabad, M. H. Paydar, R. Ebrahimi
Summary: In this study, a mathematical analysis using the slab method was used to derive a formula for calculating the average hydrostatic pressure in the compressive stage of the HPT process. Experimental results confirmed the accuracy of the analytical calculations, showing that with appropriate selection of sample volume and consideration of equipment capacity, the desired average hydrostatic pressure can be achieved.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Roman Sundeev, Anna Shalimova, Stanislav Rogachev, Olga Chernogorova, Alexander Glezer, Alexey Ovcharov, Igor Karateev, Natalia Tabachkova
Summary: A multi-metal composite was prepared by consolidating the Ti50Ni25Cu25 and Fe50Ni33B17 alloys using room-temperature high-pressure torsion (HPT). Structural research methods, such as X-ray diffractometry, high-resolution transmission electron microscopy, scanning electron microscopy, and measurement of indentation hardness and modulus, were employed in this study. The structural aspects of the bonding process were examined, and it was found that the method of coupled severe plastic deformation played a significant role in the consolidation of the dissimilar layers during HPT.
Review
Materials Science, Multidisciplinary
Dmitriy V. Gunderov, Rashid N. Asfandiyarov, Vasily V. Astanin, Alfred V. Sharafutdinov
Summary: This overview examines the effect of slippage in high-pressure torsion (HPT). The authors used the method of joint HPT of the disk halves for evaluation. They found that slippage occurs in the early stages of HPT for solid bulk metal glass and some metallic materials, but deformation and nanostructure formation still occur despite slippage.
Article
Food Science & Technology
Abir Boukil, Alice Marciniak, Samir Mezdour, Yves Pouliot, Alain Doyen
Summary: This study conducted high hydrostatic pressure treatment on soluble proteins from Tenebrio molitor and observed changes in protein structure and the formation of protein aggregates. This research lays the foundation for the development of innovative insect-based ingredients in food formulations.
Article
Chemistry, Physical
Yan Beygelzimer, Yuri Estrin, Oleksandr Davydenko, Roman Kulagin
Summary: The article presents a theoretical study of the regimes of high-pressure torsion (HPT) with possible slippage of the deforming material on the interfaces with anvils. A generalised condition for gripping the specimen with anvils is established, providing a basis for an analytical investigation of the HPT deformation. The results of the analytical modelling are supported by finite-element calculations, showing that plastic deformation is furnished by non-shear flows for friction stress below the shear stress of the specimen material, expanding the range of possible process regimes.
Article
Nanoscience & Nanotechnology
Hyogeon Kim, Hyesu Ha, Jungsub Lee, Sujung Son, Hyoung Seop Kim, Hyokyung Sung, Jae Bok Seol, Jung Gi Kim
Summary: High-pressure torsion processing induces significant mechanical property enhancement and complex microstructural changes in aluminum 7075 alloys, including grain refinement, solute migration, and strength enhancement through precipitation hardening and dissolution of brittle phases.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Juhee Oh, Sangeun Park, Hyo Ju Bae, Sujung Son, Hyoung Seop Kim, Jae Bok Seol, Hyokyung Sung, Jung Gi Kim
Summary: Elevated temperature high-pressure torsion processing can alter the microstructure of aluminum alloys and enhance their mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
N. N. Liang, R. R. Xu, G. Z. Wu, X. Z. Gao, Y. H. Zhao
Summary: A nanocrystalline high-entropy alloy was produced by high pressure torsion, and the evolution of microhardness and microstructure during subsequent isochronal annealing was studied. The alloy exhibited nano-grains and deformation nano twin lamella, which contributed to its hardness. Annealing below 600°C induced hardening without precipitation effect, while annealing above 600°C resulted in evident recrystallization and grain growth. The high thermal stability of the alloy was attributed to kinetic sluggish diffusion effect and deformation twin boundaries.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Biochemistry & Molecular Biology
Seyyed Mahdi Mirzababaee, Duygu Ozmen, Mohammad Ali Hesarinejad, Omer Said Toker, Samira Yeganehzad
Summary: This study investigates the effect of high-pressure treatment on the properties of millet starch. The results show that high-pressure treatment modifies the structure, morphology, pasting, thermal, and rheological properties of the starch. The treatment increases water holding capacity and hydration ability of the starch, decreases gelatinization temperature and enthalpy, and reduces viscosity. Additionally, pressure and time also increase the elasticity of the starch samples.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Food Science & Technology
Derong Lin, Jingjing Zhao, Zhengwu Wang, Wen Qin, Zhijun Wu
Summary: The effect of GSH treatment on the digestibility, physicochemical, and structural properties of maize starch under high hydrostatic pressure was investigated. GSH increased the content of slowly digestible starch and inhibited retrogradation. However, it had minimal effect on starch crystallinity.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
R. V. Sundeev, A. V. Shalimova, S. O. Rogachev, O. P. Chernogorova, A. M. Glezer, A. V. Ovcharov, I. A. Karateev
Summary: This study investigates the possibility of forming a multi-metal composite by high-pressure torsion (HPT) at room temperature using two dissimilar alloys, Ti50Ni25Cu25 and Fe50Ni33B17. The results show that the consolidation of the dissimilar layers is achieved through mutual severe plastic deformation.
Article
Chemistry, Physical
Amandine Duchaussoy, Xavier Sauvage, Alexis Deschamps, Frederic De Geuser, Gilles Renou, Zenji Horita
Summary: High yield strength can be achieved in 7### aluminum alloys through severe plastic deformation (SPD) using the High Pressure Torsion (HPT) process. However, this technique has limitations in terms of processing large parts and achieving homogeneous plastic strain. A recent development called High Pressure Sliding (HPS) allows for homogeneous deformation of large scale sheets, offering promise for the production of high strength aluminum alloys. Studying the competition between precipitation, grain growth, and recrystallization during heat treatments after SPD provides insight into obtaining high mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nutrition & Dietetics
Qiaoming Liao, Han Tao, Yali Li, Yi Xu, Hui-Li Wang
Summary: The study investigates the inactivation mechanism of Enterobacter sakazaki induced by high hydrostatic pressure (HHP), showing that HHP leads to loss of cell membrane integrity, downregulation of specific genes, and modification of oxidative stress and biofilm formation. These findings highlight the association of genotype to phenotype in E. sakazakii under HHP treatment for controlling food-borne pathogens.
FRONTIERS IN NUTRITION
(2021)
Article
Biochemistry & Molecular Biology
Md Hafizur Rahman, Miao Zhang, Hong-Nan Sun, Tai-Hua Mu
Summary: The effects of high hydrostatic pressure treatment on maize, potato, and sweet potato starches in gluten-free doughs were investigated. The results showed that high pressure treatment increased gas production and rheological properties, leading to improved characteristics in the doughs.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Chemistry, Physical
Payam Edalati, Abbas Mohammadi, Mostafa Ketabchi, Kaveh Edalati
Summary: Dual-phase HEAs have attracted significant attention due to their promising mechanical properties, and experimental investigation on the AlFeCoNiCu alloy reveals diverse microstructural evolution behaviors of the two phases during plastic deformation, leading to a high microhardness of 495 Hv under high-pressure torsion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Fatemeh Alijani, Mohsen Reihanian, Khalil Gheisari, Kaveh Edalati, Hiroyuki Miyamoto
Summary: The effect of homogenization on the microstructure and hardness of FeCoNiMn high entropy alloy during high-pressure torsion was investigated. The results showed that homogenization could lead to a reduction in grain size and an increase in hardness.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Nanoscience & Nanotechnology
Roberto B. Figueiredo, Kaveh Edalati, Terence G. Langdon
Summary: This study evaluates the contribution of thermally-activated creep mechanisms to the flow stress of nanomaterials processed by high-pressure torsion, and provides an explanation for the strain softening phenomenon in metals with low melting temperatures. The results confirm the significance of thermally-activated phenomena in determining the flow stress of nanomaterials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Haruka Shimizu, Motohiro Yuasa, Hiroyuki Miyamoto, Kaveh Edalati
Summary: The influence of nanocrystalline structure produced by severe plastic deformation on the corrosion behavior of CoCrFeMnNi alloys was investigated. It was found that the impact of nanocrystalline structure on corrosion behavior was negligible.
Article
Chemistry, Physical
Gaspar Andrade, Guilherme Zepon, Kaveh Edalati, Abbas Mohammadi, Zhongliang Ma, Hai-Wen Li, Ricardo Floriano
Summary: The crystal structure and hydrogen storage properties of a new equiatomic TiZrNbCrFeNi high-entropy alloy (HEA) were investigated. The alloy exhibited an AB-type configuration, selected through thermodynamic calculations and showed the ability to absorb 1.5 wt% of hydrogen at room temperature without activation. Cyclical testing revealed changes in the fractions of two C14 Laves phases, with one phase having higher reactivity towards hydrogen. The alloy exhibited a single C14 Laves phase after dehydrogenation at 473 K, and microstructural analysis showed excellent homogeneity and element distribution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Chemistry, Physical
Saeid Akrami, Tatsumi Ishihara, Masayoshi Fuji, Kaveh Edalati
Summary: Excessive CO2 emission from fossil fuel usage has led to global warming and environmental crises. The photocatalytic conversion of CO2 to CO or useful components is a new strategy to address this issue. The main challenge is finding photocatalysts with high efficiency for CO2 photoreduction. Severe plastic deformation (SPD) has been used to develop active catalysts for CO2 conversion. These strategies can enhance photocatalytic efficiency by improving CO2 adsorption, increasing light absorbance, aligning the band structure, and providing active sites for photocatalytic reactions. This article reviews recent progress in using SPD to develop functional ceramics for photocatalytic CO2 conversion.
Review
Chemistry, Physical
Kaveh Edalati
Summary: Superfunctional materials refer to materials with specific properties that surpass those of engineering materials. Severe plastic deformation (SPD) has been widely studied as an effective means to enhance the functional and mechanical properties of metallic and non-metallic materials. Recently, the concept of ultra-SPD, which introduces shear strains exceeding 1000 to reduce the thickness of sheared phases to atomic distances, has been utilized to synthesize novel superfunctional materials. This article discusses the application of ultra-SPD in controlling atomic diffusion, phase transformation, and the synthesis of materials with superfunctional properties.
Article
Materials Science, Multidisciplinary
Abbas Mohammadi, Payam Edalati, Makoto Arita, Jae Wung Bae, Hyoung Seop Kim, Kaveh Edalati
Summary: In this study, three strategies are combined to achieve excellent strength-plasticity combinations in the presence of hydrogen embrittlement phenomena. First, an FCC high-entropy alloy with slow hydrogen lattice diffusion is selected. Second, aluminum is added to hinder surface-to-bulk hydrogen diffusion. Third, low-mobility lattice defects like nanotwins and Lomer-Cottrell locks are introduced by severe plastic deformation to suppress hydrogen-enhanced localized plasticity and stress concentration. The Al0.1CrFeCoNi alloy severely deformed by high-pressure torsion exhibits an ultrahigh yield strength of 1.96 GPa and a high elongation to failure of 10%.
Review
Materials Science, Multidisciplinary
Kaveh Edalati, Etsuo Akiba, Walter J. Botta, Yuri Estrin, Ricardo Floriano, Daniel Fruchart, Thierry Grosdidier, Zenji Horita, Jacques Huot, Hai-Wen Li, Huai-Jun Lin, Adam Revesz, Michael J. Zehetbauer
Summary: Magnesium and its alloys are extensively studied for solid-state hydrogen storage, but there are challenges in the kinetics and thermodynamics of hydrogenation and dehydrogenation. Severe plastic deformation methods have been utilized to improve the activation, air resistance, and kinetics of Mg-based hydrogen storage materials by introducing ultrafine/nanoscale grains and crystal lattice defects. These deformed materials, particularly with alloying additives or second-phase nanoparticles, exhibit fast hydrogen absorption/desorption kinetics and good cycling stability. The study also highlights the application of severe plastic deformation methods in hydrogen binding-energy engineering and the synthesis of new magnesium alloys for reversible low/room-temperature hydrogen storage.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Crystallography
Shivam Dangwal, Kaveh Edalati, Ruslan Z. Z. Valiev, Terence G. G. Langdon
Summary: Strengthening and softening mechanisms in ultrafine-grained materials have been debated for many years. This study examines the Hall-Petch relationship in ultrafine-grained magnesium, aluminum, copper, and iron. The results show that while the materials follow the Hall-Petch relationship initially, an up-break occurs for grain sizes below 500-1000 nm. This is due to enhanced dislocation contribution. However, a down-break occurs for grain sizes smaller than 70-150 nm due to diminished dislocation contribution and increased thermally-activated phenomena. The study also finds that strategies other than grain refinement, such as microstructural stabilization by segregation or precipitation, are necessary to achieve extra strengthening.
Article
Engineering, Electrical & Electronic
Tetsuro Sueyoshi, Toshinori Ozaki, Satoshi Semboshi, Hitoshi Sakane, Terukazu Nishizaki, Norito Ishikawa
Summary: A variety of irradiation defects were introduced into NdBa2Cu3Oy thin films, ranging from columnar defects to spherical ones. The highest critical current density J(c) was obtained when spherical defects were installed at a matching field of B-phi = 10 T. In contrast, the J(c) of the irradiation with elongated columnar defects increased only up to B-phi = 5 T, resulting in a lower value.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Review
Materials Science, Multidisciplinary
Parisa Edalati, Masayoshi Fuji, Kaveh Edalati
Summary: This article reviews the recent advances in the application of severe plastic deformation to developing superfunctional high-entropy materials, highlighting their superior properties for various mechanical and functional applications.
Article
Nanoscience & Nanotechnology
Yuito Nakamura, Koshin Takeshita, Terukazu Nishizaki, Jiro Kitagawa
Summary: The structural and magnetic properties of high-entropy RNi (R = Dy, Tb1/3Dy1/3Ho1/3, and Gd1/5Tb1/5Dy1/5Ho1/5Er1/5) were investigated. The lattice parameters were largely unaffected by the increase of configurational entropy, and all compounds exhibited a ferromagnetic ground state. The replacement of Dy with Tb + Ho did not affect the magnetic ordering temperature, but introduced an additional magnetic anomaly. The magnetic entropy change showed a similar dependence on configurational entropy as the temperature derivative of the magnetic susceptibility. The anisotropy of rare-earth magnetic moments in the high-entropy state could be used to enhance magnetocaloric properties.
Article
Materials Science, Multidisciplinary
Alina Y. Morkina, Rita I. Babicheva, Elena A. Korznikova, Nariman A. Enikeev, Kaveh Edalati, Sergey V. Dmitriev
Summary: Molecular dynamics simulations were used to study the mechanical dissolution of Zr in Al. The orientation of the grain boundary was found to affect the mixing efficiency of alloy components, with a normal orientation promoting better dissolution of Zr.
Review
Engineering, Chemical
Saeid Akrami, Parisa Edalati, Masayoshi Fuji, Kaveh Edalati
Summary: Nowadays, the environmental crisis caused by fossil fuels and CO2 emissions is a widespread concern. Photocatalysis is a promising clean technology for producing hydrogen fuel, converting harmful components, and degrading pollutants. However, the low efficiency of photocatalysis remains a significant drawback. Recent studies have shown that high-pressure torsion (HPT) can effectively improve the activity of conventional photocatalysts and synthesize highly efficient ones by increasing light absorbance, narrowing the bandgap, aligning the band structure, and decreasing electron-hole recombination through introducing lattice strain, vacancies, high-pressure phases, heterojunctions, and high-entropy ceramics. This review discusses the recent findings on improving photocatalyst efficiency through HPT processing and the parameters that contribute to these improvements.
KONA POWDER AND PARTICLE JOURNAL
(2023)
