Article
Nanoscience & Nanotechnology
Sudipta Pramanik, Dennis Milaege, Kay-Peter Hoyer, Mirko Schaper
Summary: This investigation examines a new additively manufactured circular honeycomb sample made of the titanium alloy Ti6Al7Nb. Compared to hexagonal honeycomb samples, the circular honeycomb shows superior mechanical properties. Compression testing reveals a wider stress-strain curve and higher tensile stress and elongation in the circular honeycomb sample. Failure occurs layer-by-layer in the circular honeycomb, while the hexagonal honeycomb fails due to shear of struts. The circular honeycomb sample is found to be superior in impact and energy absorption applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Composites
Hui Zhao, Ting Yuan, Chaowei Zeng, Wei Peng, Zhenwei Sun, Hongjun Hu
Summary: This study systematically investigates the microstructure evolution and mechanical properties of Steel/Mg composites. It is found that there is an interdiffusion phenomenon of Mg and Zn elements at the interface of the composites, forming an interdiffusion layer and compounds. The inclusion of steel wire can effectively reduce the texture strength of the Mg alloy matrix, and the Steel/Mg composites exhibit higher tensile and compressive strength compared to Mg-R. This research provides a novel, time-saving, and cost-effective method for manufacturing continuous fiber reinforced metal matrix composites (CFRMMCs), expanding the application of metal composites.
COMPOSITES COMMUNICATIONS
(2023)
Article
Engineering, Civil
Solomon O. Obadimu, Kyriakos I. Kourousis
Summary: This study investigates the in-plane compressive performance of metallic honeycomb structures produced through material extrusion (ME) and laser powder bed fusion (LPBF). The research finds that the compressive mechanical properties of both types of honeycomb structures improve with increasing load rate, and varying the cell size can optimize the in-plane compressive performance.
ENGINEERING STRUCTURES
(2022)
Article
Chemistry, Physical
Minoru Maeda, Akiyoshi Matsumoto, Gen Nishijima, Yoon-Uk Heo, Seungyong Hahn, Sangjin Lee, Seyong Choi, Jung Ho Kim
Summary: In this study, the researchers proposed a method of regulating porous properties using magnesium powder blending. Through a detailed investigation, they found a significant correlation between various particle parameters, impurities, superconducting transition temperature, and current carrying capacity, with the porous properties. The blending of raw powders with spherical shape allowed for tuning of morphological structures and crystallinities inside the cores of the MgB2 superconducting wires, resulting in superior superconducting properties. This finding provides valuable insights for the widespread use and application of superconducting materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Multidisciplinary
Somashree Mondal, Robert Katzschmann, Frank Clemens
Summary: 3D printing of magnetorheological elastomers (MREs) can create versatile and complex mechanical structures with reversible stiffening properties. The use of MREs based on thermoplastic elastomers (TPE) in 3D printing and their magnetorheological (MR) effect in lightweight honeycomb designs are demonstrated for the first time. The MR effect can be tuned by designing MRE structures with a honeycomb infill.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Shubham Sharma, Vikas Patyal, P. Sudhakara, Jujhar Singh, Michal Petru, R. A. Ilyas
Summary: This study explores the applicability of MWCNTs reinforced with AA2024-T351 alloys for electromechanical applications. The results show that MWCNTs provide extraordinary synergistic strength and enhance various mechanical characteristics of aluminum-based composites. This research is of great importance for the development of high-strength MWCNTs/Al-Cu-Mg-T351 matrix composites for multifunctional applications.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Chemistry, Physical
Donghui Yang, Sensen Guo, Jianqing Chen, Chao Qiu, Solomon-Oshioke Agbedor, Aibin Ma, Jinghua Jiang, Lei Wang
Summary: Mg-Al-Zn alloy foam with a closed-cell structure was fabricated using CaCO3 as the blowing agent via a powder metallurgical approach. The foam possesses higher compressive strength than other alloy foams.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Christian Weigelt, Florian Kerber, Christine Baumgart, Lutz Krueger, Christos G. Aneziris
Summary: The research focuses on the manufacturing of innovative metal components using a combination of powder metallurgy and ceramics-derived processing. High-alloyed TRIP steels are used to produce metal components with outstanding mechanical properties for advanced load applications. Some alloying elements with oxygen affinity promote the formation of non-metallic particles during sintering, which affect the mechanical properties.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Ceramics
Xiujuan Chen, Yueming Li, Guorui Zhao
Summary: High density zirconia (ZrO2) parts with 3 mol% yttrium oxide (3Y-TZP) were successfully fabricated using powder extrusion printing (PEP). The microstructure, phase evolution, surface quality, and mechanical properties of the parts were characterized and analyzed. The parts exhibited high density, submicron cellular grains, and anisotropic properties in surface quality and compressive strength.
CERAMICS INTERNATIONAL
(2023)
Article
Mechanics
Saveria Spiller, Sondre Olsoybakk Kolstad, Nima Razavi
Summary: The fatigue life of 316L components fabricated via MEAM is lower compared to wrought 316L, as internal defects from the deposition strategy result in observed crack initiation sites.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Chemistry, Physical
Peng Peng, Jia She, Qingshan Yang, Shuai Long, Aitao Tang, Jianyue Zhang, Qingwei Dai, Fusheng Pan
Summary: A new low-cost and high mechanical strength Mg-0.5Gd-xMn (x = 0, 0.5, 1.0, 1.5, 2.0 wt. %) alloy system was developed by low-temperature extrusion. The alloy exhibited gradually increased yield strength and ultimate tensile strength with the increment of the Mn content. It possessed comparable high mechanical strength with heavy rare-earth content traditional Mg alloys but at a much lower cost.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jun Xu, Wenjun Liu, Bin Jiang, Huabao Yang, Xintao Li, Yuehua Kang, Nan Zhou, Weiwen Zhang, Kaihong Zheng, Fusheng Pan
Summary: The transverse gradient extrusion (TGE) process was proposed for fabricating Mg-3Al-1Zn (AZ31) alloy sheet with tailored strong basal texture. A novel texture was formed in the TGE sheet, tilted about 65 degrees from normal direction (ND) to extrusion direction (ED), and elongated along the transverse direction (TD). The TGE sheet exhibited a large Erichsen value compared to the conventional extruded (CE) sheet, thanks to its unique texture and uniform fined grain structure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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
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, Multidisciplinary
Yuxi Liu, Ye Liu, Wei Zhang, Yingbo Peng, Xianzhi Zhu, Xinrun Xiong, Min Wu, Bin Liu
Summary: Polycrystalline Cubic Boron Nitride (PcBN) is widely utilized for its exceptional wear resistance and high hardness. This report explores the rheological properties of multi-material feedstocks, shape-performance control, and densification mechanism in the process of powder extrusion 3D printing (PEP) combined with high temperature and high-pressure method (HTHP). The findings demonstrate that the PcBN feedstocks behave according to the shear thinning model, and the flexural strength and hardness of the PcBN increase with the sintering temperature.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Christiane Ullrich, Stefan Martin, Christian Schimpf, Andreas Stark, Norbert Schell, David Rafaja
ADVANCED ENGINEERING MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Christine Baumgart, Christian Weigelt, Andreas Lissner, Stefan Martin, Christos G. Aneziris, Lutz Krueger
ADVANCED ENGINEERING MATERIALS
(2020)
Article
Chemistry, Physical
A. Leineweber, M. J. Kriegel, B. Distl, S. Martin, V Klemm, S-L Shang, Z-K Liu
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Chemistry, Multidisciplinary
Peter D. B. Fischer, Stefan Martin, Alexander Walnsch, Martin Thuemmler, Mario J. Kriegel, Andreas Leineweber
Summary: Iron-based Fe-Mn-Al-Ni shape-memory alloys are cost-effective materials with remarkable pseudoelastic properties. The martensitic transformation of these alloys, studied through heat treatment and quenching, reveals a complex structure described by nanoscale twinned structure with tetragonal distortion. The lack of interstitial elements does not prevent the presence of these features.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2021)
Article
Chemistry, Physical
Benjamin Hering, Anne-Kathrin Wolfrum, Tim Gestrich, Mathias Herrmann
Summary: The research found that the TiN coating reacts with cBN at temperatures above 1200 degrees C in argon, forming a porous TiB2 layer, while no reaction occurs in nitrogen up to temperatures of 1600 degrees C. Nonetheless, the 20 and 50 nm thin coatings also undergo a recrystallization process during heat treatment up to temperatures of 1600 degrees C.
Article
Engineering, Electrical & Electronic
A. Leineweber, M. Loffler, S. Martin
Summary: Cu6Sn5 intermetallic compound can undergo composition and order changes in solder joints, affecting the mechanical properties of the solder. Investigations show that Sn-poor eta phase can increase its Sn content through different processes, while Cu6Sn5 growth at low temperature is typically influenced by grain-boundary diffusion.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Andreas Leineweber, Marius Holger Wetzel, Stefan Martin, Shun-Li Shang, Zi-Kui Liu
Summary: An unprecedented NiSn2 intermetallic with a CoGe2-type crystal structure was recovered after high-pressure high-temperature treatment, showing a defective character in the crystal structure. Theoretical calculations suggest that a CuAl2-type crystal structure may be stable under these conditions, which transforms to the recovered CoGe2-type crystal structure upon cooling or release of pressure.
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
(2021)
Article
Materials Science, Ceramics
Stefan Martin, Wolfgang Wisniewski, Christian Ruessel
Summary: Electrochemically induced nucleation can trigger the growth of Ba-fresnoite dendrites in a glass melt, resulting in highly perfect crystal lattice. The dendrites grown after EiN have no observable crystal defects, making them suitable for applications in piezoelectric materials.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
S. Martin, A. Weidner, C. Ullrich, C. Schimpf, M. Motylenko, R. Lehnert, H. Biermann, D. Rafaja, A. Vinogradov, Y. Estrin
Summary: This article explores the microstructural evolution and deformation mechanisms of high-alloy austenitic steel, demonstrating the impact of twin nucleation process on the strain hardening behavior. Experimental data and model predictions provide insights into the enhanced plasticity of the steel, with general guidelines for austenitic steel design established based on the findings.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Maryam Akhlaghi, Stefan Martin, Johannes Dallmann, Rainer Hock, Carolin Koerner, Andreas Leineweber
Summary: This study investigated the transformation of Co-Cr alloy from hexagonal close packed (hcp) to face-centered cubic (fcc) crystal structure during gaseous nitriding. Anisotropic progress of the transformation was observed on differently-oriented hcp crystallites, with slower transformation on hcp orientations with the highest Schmid factor.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
S. Martin, A. Winkelmann, A. Leineweber
Summary: This study demonstrates for the first time that the disordered eta phase transforms into the monoclinic eta phase with a characteristic twin-domain microstructure when the Cu-rich Cu6Sn5 intermetallic is ordered. Detailed Kikuchi diffraction pattern analysis is used to investigate the domain microstructure. The simulation-based Kikuchi diffraction pattern matching approach proves to be more sensitive to different domain orientations compared to the conventional EBSD analysis.
Article
Materials Science, Multidisciplinary
Andreas Leineweber, Max Fischer, Stefan Kante, Stefan Martin
Summary: Nitriding of Fe-1 wt.% Cu and Fe-5 wt.% Cu alloys at 813 K leads to the predominant formation of gamma '-iron nitride phase (gamma '-Fe4N) and epsilon-iron nitride phase (epsilon-Fe3N1+x) in pure alpha-Fe. The higher solubility of Cu in the gamma ' phase compared to the epsilon phase is attributed to the crystal structures of these phases.
Article
Chemistry, Physical
Chao Liu, Anne Guenther, Yuanbin Deng, Anke Kaletsch, Mathias Herrmann, Christoph Broeckmann
Summary: Researchers investigated the curvature and stress distribution in metal-ceramic laminates (MCLs) using analytic solutions and FE simulations, finding that the CTE and height ratio have a greater influence on curvature, and the interface significantly prevents curvature, providing insights for avoiding delamination during the manufacturing process.
Article
Chemistry, Physical
S. Martin, D. Sulik, X. F. Fang, H. Becker, A. Leineweber
Summary: The microstructure of a successfully applied Al-Si bond coating for the interconnection of cast aluminum alloy with a conventional steel substrate is analyzed. The bond coating consists of a columnar Al layer attached to the steel substrate with an intermetallic layer. Silicon grains precipitate between the Al layer and the intermetallic phases, forming ternary compounds. Shear tests confirm the successful connection of the bond coating with the steel substrate.
Article
Engineering, Manufacturing
Lea Schmidtner, Hannes Heinrich, Marcel Fuchs, Anke Poetzsch, Stefan Janz, Mathias Herrmann, Christos Aneziris, Thomas Kaden
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2020)
