Article
Engineering, Industrial
Cheng Luo, Yansong Zhang
Summary: In this study, Al/Ni reactive multilayer nanofoils were used as a local heat source at the faying interface of micro resistance welding of copper foils, leading to an increase in joint strength. Grain boundary relaxation and Kirkendall effect resulted in grain refining of the AlNi alloy compound at the faying interface, contributing to the improvement of joint strength.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Marcus Glaser, Sebastian Matthes, Joerg Hildebrand, Jean Pierre Bergmann, Peter Schaaf
Summary: Multi material pairings, such as metal-plastic hybrids, are increasingly important in various industries. However, substituting metals with plastics presents numerous challenges due to the combination of dissimilar materials. This study investigates the joining process between semi-crystalline polyamide 6 and austenitic stainless steel X5CrNi18-10 using reactive Al/Ni multilayers. The focus is on evaluating the joint strength and understanding the failure behavior and binding mechanisms at the fracture interface under tensile load.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Maria Amelia Martins, Daniel Wyn Mueller, Joerg Schmauch, Marcus Glaser, Jean Pierre Bergmann, Frank Muecklich, Christoph Pauly
Summary: Reactive multilayer foils (RMFs) have the capability of self-propagating exothermic reactions, which makes them suitable for localized heat source in joining applications. Laser structuring allows cutting of arbitrary shapes into foil to change the direction of reaction front propagation, altering the heat release and providing control over the joining process. RMFs also enable a flow of molten material, potentially strengthening the joint. They have diverse applications in various industries and can be an alternative to adhesive bonding or plastic welding due to the drawbacks of these processes.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Stepan Seropyan, Ivan Saikov, Dmitrii Andreev, Gulnaz Saikova, Mikhail Alymov
Summary: The study found that the introduction of continuous fibers into Ni-Al compacts significantly increases flexural strength, while the combination of heat treatment and material reinforcement further enhances strength without compromising reactivity.
Article
Automation & Control Systems
Yiqun Wang, Guoxin Lu, Zhong Ji, Ren Liu, Chao Zheng
Summary: Laser shock adhesive-clinching (LSAC) is an original material joining technique that combines clinching and laser shock clinching. This paper analyzes the LSAC process and the deformation of LSAC joints under shear loads, and investigates the effect of adhesive on LSAC joint manufacturing.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Chemistry, Physical
E. Bonetti, M. Cabibbo, E. G. Campari, R. Montanari
Summary: The anelastic behavior of 5N-Al thin foils with three different thicknesses was studied using Mechanical Spectroscopy. Different relaxation peaks were observed in samples with different thicknesses, and the defective structures were found to depend on foil thickness. Additionally, permanent grain boundary sliding was found to contribute to the high temperature background in the thinnest foils.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Mostafa Baloochi, Deepshikha Shekhawat, Sascha Sebastian Riegler, Sebastian Matthes, Marcus Glaser, Peter Schaaf, Jean Pierre Bergmann, Isabella Gallino, Joerg Pezoldt
Summary: A two-dimensional numerical model was developed to study the self-propagating reactions in Al/Ni multilayer foils, showing that increased thermal conductivity of the final product leads to higher reaction front velocity, the effect of heat convection losses on reaction characteristics is insignificant, and higher initial temperature of the foils results in increased reaction front velocity and temperature.
Article
Chemistry, Physical
Xianzheng Xi, Peng Lin, Lingjian Meng, Shuaibing Xue, Fei Lin, Zhixiong Zhang, Tao Wang
Summary: This study prepared Ni-Al intermetallic sheets by the reaction synthesis of pure Ni and Al foils with different thickness ratios, and found that the original thickness ratios of Ni and Al foils affected the microstructure and mechanical properties of the Ni-Al intermetallic sheets.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Tianli Zhao, Bing Zhang, Fenfen Zhao, Zhijuan Zhang, Xiaohan Dang, Yanheng Ma, Jun Cai, Kuaishe Wang
Summary: The hot deformation behavior of multilayered Ti/Ni composites was studied using isothermal compression tests, with the Arrhenius-type constitutive model providing accurate predictions under different conditions. Higher energy dissipation efficiency was observed at medium & high temperature/low strain rate, with a large unstable region due to the presence of interfaces. Optimum processing parameters for the composites were identified at 630-700 degrees C/0.001-0.003 s(-1), with different deformation mechanisms for Ni and Ti layers at various temperatures and strain rates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Physics, Applied
Xia Tian, Meizhen Xiang, Junzhi Cui, Guangyu Ji, Zhuojia Fu
Summary: The spalling behaviors of Ni/Al nanolaminates are influenced by the combination effects of micro-structures, chemical reactions, and temperature softening. A zigzag variation trend of spall strength is observed with increasing impact velocity, which is attributed to the interaction of liquid Al with amorphous Ni near the interface leading to rapid chemical reactions and enhanced spall strength.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Sergey Matveev, Dana D. Dlott, Siva Kumar Valluri, Mehnaz Mursalat, Edward L. Dreizin
Summary: Metal-based reactive nanomaterials can generate more energy than conventional organic explosives, but they require specific conditions for detonation. Research shows that these materials release energy much faster under shock impact than when heated. While these materials alone may not detonate, using them as additives could significantly boost the energy of chemical explosives.
APPLIED PHYSICS LETTERS
(2021)
Article
Computer Science, Information Systems
Sangeeta Dhall, Shailender Gupta
Summary: Telemedicine is a technology-based substitute for conventional health care facilities, and this paper proposes a multi-layer protection mechanism to secure patient records and medical images. Using compression, encryption, steganography, and biometric-based detection, the proposed mechanism aims to provide a highly secure and authentic medical healthcare system.
MULTIMEDIA TOOLS AND APPLICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Paul Vishniakov, Oleg Medvedev, Artem Kim, Maxim Maximov
Summary: Temperature conditions are crucial for the crystal structure formation of cathode materials, and annealing at 800 degrees C for 5 minutes can result in crystalline films with spherical Li-Ni-Co-O structures.
Article
Materials Science, Multidisciplinary
Binbin Liu, Zhu Zhu, Caiyun Liu, Yao Wang, Feng Ye
Summary: Thin Ti layers were inserted in the interfaces of base Al/Ni multilayer foils to form the ATNT foils. The analysis showed asymmetric interface structure and phase composition changes after annealing. The inserted Ti layers impeded the formation of early Al3Ni but had less impact on the final products.
Article
Nanoscience & Nanotechnology
Ji-Peng Zou, Xue-Mei Luo, Bin Zhang, Yan-Wen Luo, Hong-Lei Chen, Fei Liang, Guang-Ping Zhang
Summary: The study found that adding Al can improve the fatigue resistance of CoCrFeMnNi-based high-entropy alloy thin foils, reduce cyclic strain localization, and delay the propagation of fatigue cracks.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Applied
Hannah Woods, Andrew Boddorff, Elena Ewaldz, Zachary Adams, Mitchell Ketcham, Dong June Jang, Elizabeth Sinner, Naresh Thadhani, Blair Brettmann
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2020)
Article
Multidisciplinary Sciences
Jie Chen, Suveen N. Mathaudhu, Naresh Thadhani, Avinash M. Dongare
SCIENTIFIC REPORTS
(2020)
Article
Nanoscience & Nanotechnology
Weiliang Zhang, Liangju He, Zhigang Lu, Gregory B. Kennedy, Naresh N. Thadhani, Peijie Li
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Review
Chemistry, Multidisciplinary
Gill M. Biesold, Shuang Liang, Blair Brettmann, Naresh Thadhani, Zhitao Kang, Zhiqun Lin
Summary: This review introduces colloidal semiconductor nanocrystals and examines the effects of uniform pressure on the optical properties of various semiconductor nanocrystals, summarizing the optical properties of these nanocrystals under static and dynamic pressure. Future research directions and applications utilizing the pressure-dependent optical properties of semiconductor nanocrystals are also discussed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Physics, Applied
Karla B. Wagner, Amirreza Keyhani, Andrew K. Boddorff, Gregory Kennedy, Didier Montaigne, Brian J. Jensen, Matthew Beason, Min Zhou, Naresh N. Thadhani
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Engineering, Mechanical
Weiliang Zhang, Gregory B. Kennedy, Konrad Muly, Peijie Li, Naresh N. Thadhani
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
Ali Khosravani, Naresh Thadhani, Surya R. Kalidindi
Summary: This study explores the benefits of using recently developed protocols for microstructure quantification and multiresolution mechanical characterization of Ti-based bulk metallic glass matrix composites. The results showed that decreasing amorphous volume fraction leads to a decrease in both bulk Young's modulus and the bulk yield strength of the samples, without significant changes in the mechanical properties of the constituent phases.
Article
Engineering, Manufacturing
Sungwoo Jang, Andrew Boddorff, Dong June Jang, Jacob Lloyd, Karla Wagner, Naresh Thadhani, Blair Brettmann
Summary: This study examines the effects of four key process parameters on filament geometry and interfilament void formation in high solids loaded polymer composites printed via material extrusion additive manufacturing. It found that layer height plays the most significant role in line aspect ratios and void formation in printed structures. The results suggest a method to control porosity in fully dense structures with high solids loaded inks using the layer height parameter while maintaining geometric accuracy.
ADDITIVE MANUFACTURING
(2021)
Article
Nanoscience & Nanotechnology
Simple Kumar, Andrew Li, Naresh N. Thadhani, Mark R. Prausnitz
Summary: The study showed that optimizing intracellular macromolecule delivery by nanoparticle-mediated photoporation can be achieved by prolonged exposure at low laser fluence, potentially due to longer time for molecules to diffuse into cells.
NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE
(2021)
Article
Physics, Applied
Andrew K. Boddorff, Sungwoo Jang, Gregory Kennedy, Karen Taminger, Naresh N. Thadhani
Summary: In this study, the dynamic tensile spall failure of additively manufactured two-layered bimetallic GRCop-84-Inconel (R) 625 alloys with different interface geometries was investigated using gas-gun experiments and multiple photon Doppler velocimetry. The results showed that the spall failure location and spall strength varied depending on the geometry of the interface. The combination of experimental results and microstructural observations provided a useful method for determining the complex spall failure response of two-layered bimetallic alloys.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
K. D. Koube, G. Kennedy, K. Bertsch, J. Kacher, D. J. Thoma, N. N. Thadhani
Summary: This paper investigates the spall damage mechanisms in LPBF-fabricated stainless steel SS316L under uniaxial strain plate-impact loading. The failure evolution with increasing impact velocity and peak pressure is explored, revealing a heterogeneous failure response and various failure mechanisms.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Physics, Applied
K. D. Koube, T. Sloop, K. Lamb, J. Kacher, S. S. Babu, N. N. Thadhani
Summary: This study investigates spall failure and damage modes in Laser Powder Bed Fusion fabricated Stainless Steel 316L (SS316L) with intentional low-volume porosity. The results show that the suppression of spall failure is observed with increasing porosity, transitioning from spall-centered tensile stress dominated failure to a pore-centered microstructure-dominated damage mode involving void/crack nucleation and growth. The critical porosity level and spall location depend on both the volume fraction and the size of the initially fabricated pores. Heterogeneous deformation twinning, shear banding, grain rotation, and cracking are observed around pre-existing pores and expected spall failure sites.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Manufacturing
K. Lamb, K. Koube, J. Kacher, T. Sloop, N. Thadhani, S. S. Babu
Summary: This research investigates the effect of microstructure anisotropy in 316L stainless steel fabricated by laser powder bed fusion on its spall failure and properties. It is found that spall failure tends to initiate at melt pool boundaries and is heavily influenced by the orientation of the impact direction relative to the build direction. The spall behavior is more complex in samples impacted perpendicular to the build direction due to the orientation of microstructural features.
ADDITIVE MANUFACTURING
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Travis J. Voorhees, Justin W. Steiner, Gregory B. Kennedy, D. Anthony Fredenburg, Naresh N. Thadhani
SHOCK COMPRESSION OF CONDENSED MATTER - 2019
(2020)
Article
Physics, Applied
Simple Kumar, Cameron Chong, Travis Voorhees, Naresh N. Thadhani, Mark R. Prausnitz
JOURNAL OF APPLIED PHYSICS
(2020)