Article
Nanoscience & Nanotechnology
Doyun Kim, Eugenia S. Vasileiadou, Ioannis Spanopoulos, Mercouri G. Kanatzidis, Qing Tu
Summary: In this study, the in-plane Young's moduli E-parallel to of 2D lead halide Ruddlesden-Popper HOIPs were systematically investigated. It was found that E-parallel to generally follows the trend of Pb-X bond strength, showing more prominent effects of the metal halide inorganic framework on E-parallel to than E-perpendicular to. The mechanical anisotropy of 2D HOIPs can be tuned based on structural composition, particularly for iodide-based 2D HOIPs, providing valuable insights for materials design and device optimization.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Pharmacology & Pharmacy
Shubhajit Paul, Chenguang Wang, Changquan Calvin Sun
Summary: This study demonstrates a method for determining the hardness of powders that cannot form intact tablets. By using a mixing rule and a power law based on weight fraction, the hardness at zero porosity of a given powder can be predicted. This method is suitable for various binary mixtures and can capture changes in hardness caused by particle size differences.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2022)
Article
Materials Science, Ceramics
Xiaoqiang Li, Juergen Malzbender, Gang Yan, Jesus Gonzalez-Julian, Ruth Schwaiger
Summary: In this study, nanoindentation and electron-backscatter diffraction experiments were used to investigate the correlation between elastic modulus and hardness of Ti2AlN and crystallographic orientation. Two different modeling approaches were employed to better understand and predict the anisotropic mechanical behavior of MAX phase materials, revealing that elastic modulus and hardness have different dependencies on crystal orientation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Dong Kangjia, Jiang Chen, Ren Shaobin, Lang Xiaohu, Gao Rui, Ye Hui
Summary: The anisotropy of mechanical property of gallium arsenide was calculated in this study, showing that the difference of structural parameters between planes is the main reason. The hardness and fracture toughness of GaAs exhibit varying degrees of changes with crystal orientation.
JOURNAL OF INORGANIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Gyeong-Seok Hwang, Jae-Young Bae, Joon-Woo Kim, Sun-Young Park, Jeonghyun Kim, Seung-Kyun Kang, Ju-Young Kim
Summary: Nanolaminate with alternating layers of nanocrystalline Cu and amorphous CuZrTi is proposed as a highly stretchable and conductive interconnect material in stretchable devices. The optimal thicknesses of the constituent layers are 50 nm for nanocrystalline Cu and 20 nm for amorphous CuZrTi, resulting in an elastic deformation limit of 3.33% and an electrical conductivity of 11.83 S/mu m. The nanolaminates exhibit enhanced elastic deformability and conductivity, enabling the maintenance of interconnect performance under cyclic stretching with tensile strains of 114% and 30% in different structures.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Kazuhiro Hikima, Mitsuhiro Totani, Satoshi Obokata, Hiroyuki Muto, Atsunori Matsuda
Summary: The mechanical properties of sulfide-type and oxide-type solid electrolytes were systematically studied, and it was found that sulfide-type solid electrolytes had higher density, Meyer hardness, and elastic modulus compared to oxide-type solid electrolytes.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Kazuhiro Hikima, Mitsuhiro Totani, Satoshi Obokata, Hiroyuki Muto, Atsunori Matsuda
Summary: This study systematically investigated the mechanical properties of sulfide-type and oxide-type solid electrolytes for the development of all-solid-state batteries through indentation methods. The results confirmed that high-density sulfide-type solid electrolytes exhibited higher Meyer hardness and elastic modulus compared to cold-pressed pellets, providing a foundation for the fabrication of all-solid-state batteries based on the mechanical properties of solid electrolytes.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Ming Liu, Zhibo Cong, Haiying Fu, Pengyuan Li
Summary: In this study, the relationships among the ratio of indentation hardness to reduced elastic modulus, the ratio of elastic work to total work, and the ratio of permanent depth to maximum indentation displacement were investigated for 25 different materials under Berkovich indenter and various maximum indentation loads. Proportional relationships were found among these indentation variables, and a quadratic polynomial model was proposed to express the dependence of indentation hardness and reduced elastic modulus on elastic work or displacement-based measures.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Minhan Fang, Fuguo Hu, Yuanfei Han, Jianwen Le, Jiangjing Xi, Jingwen Song, Linda Ke, Meili Xiao, Weijie Lu
Summary: This study investigated the weakened anisotropy of tensile properties of selective laser melted Ti6Al4V through heat treatment, revealing that both tensile strength and ductility anisotropy decreased after heat treatment. An algorithm based on EBSD data was utilized to determine the active slip system of each grain and evaluate the Schmid factors, providing a quantitative explanation for the anisotropy of strength and the weakening mechanism. The dependence of Schmid factors on primary beta grains, the number of primary beta grains, and the presence of equiaxed grain boundary alpha explained the variation of ductility with different theta angles.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Zhenni Lei, Pengfei Gao, Xianxian Wang, Mei Zhan, Hongwei Li
Summary: This study investigates the anisotropy of mechanical properties in titanium alloy tube components formed by hot flow forming. It reveals the differences in deformation mechanisms and fracture behaviors under different loading directions, and quantifies the characteristics of the property anisotropy. The results suggest that optimizing the texture and microstructure is critical to reduce the differences in slip, damage and fracture behavior along different directions and improve the service performance of the titanium alloy tube.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Nan Yang, Miao Zhao, Huaxian Wei
Summary: In this study, a self-rotation-symmetry transformation (SRST) method is proposed to achieve isotropy and anisotropy on a single type of structure. The SRST method allows for the effective tuning of elastic modulus and is independent of the volume fraction.
ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Composites
Siyuan Guo, Xiang Zhang, Chunsheng Shi, Dongdong Zhao, Chunnian He, Naiqin Zhao
Summary: This study explores the influence of reinforcement modification on the localized mechanical instability of composites with heterogeneous grain structure. The results show that adjusting the multi-scale structure of graphene nanoplatelets reinforced Cu matrix composites can significantly improve their mechanical properties and electrical conductivity. This novel structural adjustment route has the potential to play an important role in future applications.
COMPOSITES COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Chen-Tzu Chiu, Jyun-Kai Cao, Pei-Wen Wang, Ya-Na Wu, Yao-Chang Lee, Yeau-Ren Jeng, Dar-Bin Shieh, Robert R. Reisz
Summary: In this study, the surface ultra-structural topography, nanotribology, and chemical compositions of mammal species with different dietary habits were characterized using scanning probe microscopy, depth sensing, and spectromicroscopy. It was found that enamel with greater surface hardness or thickness exhibited a more salient gradient feature from the tooth surface to the dentino-enamel junction (DEJ) that corresponds to the in situ phosphate-to-amide ratio. This gradient feature of enamel covering softer dentine determines the robust physical property of this unique biomaterial, allowing it to dissipate stress and prevent mechanical failure. The evolution of mammalian dentition's biochemical composition and biomechanical properties is related to variations in the oral processing of different food materials.
Article
Materials Science, Multidisciplinary
Yupeng Ren, Du Zhou, Guanwei Xie, Hanhui Liu, Xinyu Cui, Jiqiang Wang, Tianying Xiong
Summary: Dense and thick 7075 Al deposits were prepared using cold spray additive manufacturing (CSAM). Different heat treatments were applied to investigate the inherent anisotropy of the deposits. Microstructural and mechanical anisotropy was characterized using SEM, EBSD, Vickers micro-hardness tests, and tensile tests. The results showed that heat treatments did not eliminate microstructural anisotropy, although secondary phases preferentially nucleated at particle-particle interfaces. Mechanical anisotropy could be alleviated but not completely eliminated. The T6 sample exhibited the highest ultimate tensile strength and microhardness due to precipitation hardening. Sintering treatment greatly improved the elongation of CSAMed Al deposits.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Kinga Nalepka, Katarzyna Berent, Antonio G. Checa, Tomasz Machniewicz, Adrian J. Harris, Pawel Nalepka, Martyna Strag, Lukasz Maj, Aleksandra Szkudlarek, Magdalena Bieda, Krzysztof Sztwiertnia
Summary: Research shows that the reinforcement function of shell ribs depends not only on their morphology, but also on their microstructure, especially the outer layer built from almost monocrystalline calcitic prisms in certain bivalves. The specific microstructure formed to toughen the shell is novel and contributes significantly to the hardness and fracture toughness of the prisms.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Green & Sustainable Science & Technology
R. D. Aponte, L. A. Teran, J. F. Grande, J. J. Coronado, J. A. Ladino, F. J. Larrahondo, S. A. Rodriguez
Article
Engineering, Mechanical
Alexandre Martuscelli Faria, Joseph Youssif Saab, Sara Rodriguez, Marcos de Mattos Pimenta
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2020)
Article
Engineering, Mechanical
O. A. Zambrano, E. C. Munoz, S. A. Rodriguez, J. J. Coronado
Article
Engineering, Mechanical
Erick Hernandez-Rengifo, Sara Aida Rodriguez, John Jairo Coronado
Summary: The study demonstrates that rotating-bending fatigue behavior of a martensitic stainless steel can be enhanced through various thermochemical treatments and thermal sprayed coating, resulting in increased surface hardness and compressive stresses that delay crack initiation.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Javier Varillas, Jan Ocenasek, Jordi Torner, Jorge Alcala
Summary: Nanoindentation experiments in various metals show the onset of plastic instabilities, formation of permanent nanoimprints and defect networks. Molecular dynamics simulations reveal the processes governing contact resistance, abrupt plastic instabilities, and the evolution towards a steady-state with plateauing hardness. The ratio of hardness to Young's modulus varies between different metals, with BCC Ta and Fe showing higher values. Factors such as stacking faults, nanotwin interlocking, and defect remobilization events contribute to the formation of permanent nanoimprints. Additionally, the correlation between nanoimprint formation and material response to indentation influences the hardness to yield strength ratio, exceeding the continuum plasticity bound.
Correction
Materials Science, Multidisciplinary
C. V. Roa, J. A. Valdes, F. Larrahondo, S. A. Rodriguez, J. J. Coronado
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
C. V. Roa, J. A. Valdes, F. Larrahondo, S. A. Rodriguez, J. J. Coronado
Summary: The study evaluated the cavitation and slurry jet erosion resistance of surface-coated and thermochemically treated CA6NM 13-4 steel, finding that plasma nitriding and WC-10Co4Cr coating showed improvement against slurry jet erosion, while thermochemical treatments exhibited better increments of cavitation resistance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Engineering, Mechanical
Leonel A. Teran, Santiago Lain, Sara A. Rodriguez
Summary: A new model capable of predicting the synergistic effect of cavitation damage and hard particle erosion was developed and validated through CFD simulations and experimental results, showing good agreement between the two.
Article
Materials Science, Multidisciplinary
Jaime A. Castaneda, Oscar A. Zambrano, German A. Alcazar, Sara A. Rodriguez, John J. Coronado
Summary: A critical assessment was conducted to determine the stacking fault energy (SFE) of the austenite phase in high manganese steels using X-ray diffraction (XRD), revealing a substantial variation in SFE with chosen elastic constants, leading to potential errors of up to 37%. The study aimed to establish a more direct and reliable methodology for calculating SFE by XRD, and found that uncertainty in elastic constants can significantly impact the estimated values.
Article
Chemistry, Physical
Javier Varillas, Giovanni Ciccotti, Jorge Alcala, Lamberto Rondoni
Summary: Mathematical relations concerning particle systems require applicability conditions. The Jarzynski equality, a mechanical theory, shows surprising generality in determining free-energy variations for non-equilibrium processes. However, it can be process-dependent and its verification may be challenging.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Engineering, Mechanical
C. C. Saenz-Betancourt, S. A. Rodriguez, J. J. Coronado
Summary: The boronisation of ASTM A743 CA6NM steel significantly improves its resistance to erosion due to cavitation, with the boronising time having a significant impact on cavitation resistance. The surface FeB phase obtained after boronisation exhibits a hardness 5.22 times that of the base material.
Article
Materials Science, Multidisciplinary
Gisselle M. Barona-Osorio, Leonel A. Teran, Sara A. Rodriguez, John J. Coronado
Summary: The tribocorrosion behavior of fully austenitic steels in Ringer's solution was investigated. The 3Al alloy showed higher wear and corrosion rates, while the 8Al alloy exhibited the lowest corrosion tendency and the greatest synergistic effect.
Article
Engineering, Mechanical
Leonel A. Teran, Santiago Lain, Sara A. Rodriguez
Summary: This study investigated the behavior of particle-cavitation bubble interaction near a solid wall through simplified computational fluid dynamics simulations. Several correlations were identified and a dimensionless function was proposed to predict the impact velocity of a particle normal to the solid wall due to its interaction with a collapsing bubble.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Chemistry, Physical
Jan Ocenasek, Jan Minar, Jorge Alcala
Summary: The relationship between classic ferroelectricity and the structure of perovskite materials is dependent on the concept of lattice disorder. Lattice disorder dynamically unfolds to generate distorted rhombohedral lattices characterized by the hopping of central cations. This lattice disorder correlates with minimum configuration energy pathways for the central cations and leads to spatially modulated ultrafast polarization nanocluster arrangements.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Jorge Alcala, Jan Ocenasek, Javier Varillas, Jaafar A. El-Awady, Jeffrey M. Wheeler, Johann Michler
SCIENTIFIC REPORTS
(2020)