Review
Materials Science, Multidisciplinary
Anton du Plessis, Nima Razavi, Matteo Benedetti, Simone Murchio, Martin Leary, Marcus Watson, Dhruv Bhate, Filippo Berto
Summary: Additive manufacturing (AM) is a manufacturing method that builds a part directly in its final or near-final geometry by incrementally adding material layer by layer. Metal AM has been widely adopted and matured in the industry. Lattice structures, with complex geometries, have the potential to be fine-tuned for specific applications in terms of mechanical performance, permeability, thermal properties, etc. As metal AM techniques and design capabilities improve, new application possibilities and new products and features are being realized.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Energy & Fuels
Ali Ranjbar, Amin Izadpanahi, Arash Ebrahimi
Summary: This study evaluates the geomechanical behavior of fractures and faults in rocks as a saturated deformable discrete fracture-porous medium using coupled fluid flow-geomechanics numerical modeling. The method presented in this paper accurately describes the effects of fractures and faults on pore pressures during fluid flow.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Can Okuyucu, Tolga Han Ulucan, Mohammad Abboud, Amir Motallebzadeh, Sezer Ozerinc, Ilkay Kalay, Yunus Eren Kalay
Summary: Al-Tb metallic glass-crystalline composites were prepared through annealing, and the effects of nanocrystallites on their mechanical properties were investigated. The results showed an increase in hardness and elastic modulus after annealing, which was associated with the formation of fcc-Al nanocrystals.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Dong Han, Yongqing Zhao, Weidong Zeng, Junfeng Xiang
Summary: By adding 1.5% Cr as a slow eutectoid element, the beta phase of the forged SP700 alloy was effectively stabilized, resulting in an optimized microstructure with improved tensile properties and superplasticity. The results showed that the SP700Cr alloy exhibited higher yield strength, ultimate tensile strength, and elongation compared to the SP700 alloy, especially at elevated temperatures. Additionally, microstructural analysis revealed differences in dislocation density between the two alloys.
Article
Mechanics
Carlos Lajusticia-Costan, Silvia N. Santalla, Javier Rodriguez-Laguna, Elka Korutcheva
Summary: This paper discusses random walkers that deform the medium as they move, creating an effective attraction between walkers mediated by the medium, which can be regarded as a space metric. In the strong-deformability regime, diffusion is initially described by the porous medium equation, leading to subdiffusive behavior of an initially localized cloud of particles. The differences in growth rates can be explained by strong correlations between particles, explored through fluctuations of the center of mass of the cloud and the average density measured by the particles themselves.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Materials Science, Multidisciplinary
Keita Nomoto, Anna Ceguerra, Christoph Gammer, Bosong Li, Huma Bilal, Anton Hohenwarter, Bernd Gludovatz, Jurgen Eckert, Simon P. Ringer, Jamie J. Kruzic
Summary: The study revealed the hierarchical structure of BMGs through nanobeam electron diffraction experiments, showing that the local hardness of microscale domains decreases with the size and volume fraction of atomic clusters with higher local MRO. A model of ductile phase softening was proposed to enable the design of BMGs in the future by tuning the MRO size and distribution in the nanostructure.
Review
Materials Science, Ceramics
Zeinab Savaedi, Reza Motallebi, Hamed Mirzadeh, Mehdi Malekan
Summary: Thermoforming in the supercooled liquid region can achieve high strain-rate-sensitivity and superplastic ductility. Incipient deformation-induced crystallization and stress-assisted free volume change lead to a transition from Newtonian to non-Newtonian flow. Factors such as heating rate, processing time, and the extent of the supercooled liquid region significantly affect the structural stability. Increasing the deformation temperature enhances superplastic behavior, but high temperatures may promote crystallization and loss of superplastic ductility. Future research directions include optimizing the structure and preparation methods of metal glass-based composites and improving thermoplastic formability.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Engineering, Mechanical
Wei-Hui Lin, Chong-Min She, Chun-Yu Zhang, Paulo S. Branicio, Zhen - Dong Sha
Summary: The mechanical properties of cellular metallic glasses are influenced by the shape of their cellular structures. Random structures with uniform porosity show higher yield strength and Young's modulus compared to microlattice structures. The chiral structure displays the highest Young's modulus, while stochastic cellular structures exhibit higher energy absorption capacity.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Jihye Kwon, Olivier Bouaziz, Hyoung Seop Kim, Yuri Estrin
Summary: Crumpled metallic thin foils have great potential as weight-saving and energy-absorption materials, but further research is needed on their crumpling process and mechanical behavior, considering their complex internal structures. This study presents two possible computational strategies for simulating crumpled materials under closed-die compression. The analysis shows that the continuum-based approach is more suitable for representing the macroscopic mechanical behavior of crumpled materials within a certain range of relative densities. The porous continuum approach also offers the benefits of low computational cost and high efficacy. However, the direct method is preferable when accurately reproducing internal structural pattern changes is necessary, such as for predicting mechanical response under complex loading conditions.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Peyman Asghari-Rad, Nhung Thi-Cam Nguyen, Alireza Zargaran, Praveen Sathiyamoorthi, Hyoung Seop Kim
Summary: Superplasticity, especially high-strain rate superplasticity (HSRS) at a strain rate equal to or higher than 10(-2) s(-1), shows significant technological potential in the shape-forming of engineering materials. The formation of liquid phase at grain boundaries/interfaces can assist HSRS, and designing grain boundary segregation of a low melting temperature element in multi-principle element alloys (MPEAs) can promote HSRS by partial melting. This study demonstrated the trace of liquid phase in Al0.3CoCrNi MPEA and the possibility of tailoring microstructure for promoting HSRS in high-strength materials by grain boundary segregation engineering.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Multidisciplinary
Yuefei Jia, Shiwei Wu, Yongkun Mu, Long Xu, Chang Ren, Kang Sun, Jun Yi, Yandong Jia, Wentao Yan, Gang Wang
Summary: The coarse-grained superplasticity of high-strength lightweight medium entropy alloy offers a solution to the limitations of conventional superplastic alloys. It demonstrates excellent ductility, high strength, and a unique deformation mechanism, providing a pathway for highly efficient superplastic forming and the development of new alloys.
Article
Chemistry, Physical
Hyojin Park, Nhung Thi-Cam Nguyen, Praveen Sathiyamoorthi, Sujung Son, Jongun Moon, Hyoung Seop Kim
Summary: In this study, the superplastic behavior and microstructural characteristics of the high pressure torsion-processed Al-15(CuFeMn)(85) immiscible medium-entropy alloy (IMMEA) were investigated. The multi-phase structure generated through spinodal-like decomposition in IMMEA played a key role in maintaining the ultra-fine structure and preserving an equiaxed shape during testing at high temperatures, ultimately leading to superplastic behavior. This study is the first IMMEA superplasticity study and these results contribute to a better comprehension of the phenomenon.
Article
Materials Science, Multidisciplinary
M. Simoes, J. A. Harris, S. Ghouse, P. A. Hooper, G. J. McShane
Summary: This study investigates the quasi-static and dynamic behavior of cellular materials manufactured from 316L stainless steel using laser powder bed fusion (LPBF). The results show that the cellular architecture and manufacturing process parameters have a significant impact on the material's properties.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Ceramics
Qianke Zhu, Lu Guo, Zhe Chen, Yong Jiang, Meng Li, Kewei Zhang, Jifan Hu, Wang Li, Qi Guo
Summary: In this study, two types of magnetic ribbons were fabricated using the melt spinning method, and the effects of annealing temperature on their microstructure and magnetic properties were investigated. The annealed Fe40Ni38GaxB22-x ribbons showed a refined nanostructure due to charge transfer, which greatly improved the soft magnetic properties.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Polymer Science
Tianmiao Yu, Fengchun Jiang, Xu Cui, Mengxin Cao, Chunhuan Guo, Zhenqiang Wang, Yunpeng Chang
Summary: This article describes the preparation of a novel metallic-hollow-sphere/polyurethane acoustic composite using 316L stainless steel hollow spheres and polyurethane resins. Experimental results show that the addition of silane coupling agent on the surface of metallic hollow spheres further improves the sound insulation and sound absorption performance of the composite.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)