Article
Materials Science, Multidisciplinary
Yunpeng Zhu, Jiayu Qin, Jinhui Wang, Peipeng Jin, Peijie Li
Summary: The strain hardening behavior of AZ91 alloys fabricated by spark plasma sintering (SPS) under different sintering temperatures was investigated through compression tests at room temperature. The sintered AZ91 alloys with random texture showed high yield strength and significant strain hardening ability. The hardening abilities, including strain hardening rate, strain hardening exponent, and hardening capacity, increased with increasing sintering temperature. The strain hardening in the sintered AZ91 alloys was mainly controlled by dislocation slip and accompanied by extension twinning. The increase in hardening abilities was primarily attributed to the enhanced dislocation-induced strain hardening due to the accelerated rate of dislocation propagation caused by coarse grains. Additionally, the strain hardening induced by twinning was suppressed by fine grains and intragranular lamellar Mg17Al12 precipitates.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Tilottoma Saha, Fahmida Gulshan, Syed Ansar Md. Tofail
Summary: Magnesium alloys have shown potential as bioresorbable implants due to their compatible mechanical properties with cortical bone. This study examines a newly designed Mg alloy prepared by Spark Plasma Sintering (SPS), investigating its surface analysis, microhardness, and accelerated corrosion behavior. The results suggest that the density during sintering can be controlled to adjust the bioresorption and strength of these alloys.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Fei Gao, Yu Sun, Lianxi Hu, Jingyuan Shen, Wenchao Liu, Meiyi Ba, Cheng Deng
Summary: In this study, a lightweight TiAlV0.5CrMo refractory high-entropy alloy with ultra-fine grains was successfully fabricated using mechanical alloying and spark plasma sintering. The microstructural evolution, mechanical performance, and strengthening mechanisms of the alloy were systematically characterized. The alloy exhibited excellent mechanical properties, which were attributed to the combined effects of solid solution strengthening, grain boundary strengthening, and precipitation strengthening.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
P. Minarik, M. Zemkova, J. Vesely, F. Lukac, J. Bohlen, M. Knapek, R. Kral
Summary: The study shows that magnesium-rare earth metal alloys, such as Mg-4Y-3Nd, can benefit from the utilization of sufficiently high sintering temperature and pressure during spark plasma sintering, leading to improved diffusion between powder particles and successful powder consolidation by destabilizing and shattering oxide shells through severe diffusion of rare earth metals.
Article
Nanoscience & Nanotechnology
Xuan Wang, Yan Tang, Maohua Quan, Lei Zheng, Ye Meng
Summary: In this study, Nb-27.3Ti-18Al alloys with columnar strengthening phases were fabricated by SPS and MA. The microstructure evolution and toughening mechanisms of two different powders were analyzed, showing the promotion of columnar phase formation by a specific powder and the good fracture toughness of alloy with 27.3 atomic percentage Ti content.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
L. M. Kang, Y. J. Cai, X. C. Luo, Z. J. Li, X. B. Liu, Z. Wang, Y. Y. Li, C. Yang
Summary: The study introduces a new methodology for preparing high-performance metallic alloys, and successfully demonstrates the exceptional mechanical properties of the Ti-6Al-4V alloy.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Michal Knapek, Peter Minarik, Adam Gres, Maria Zemkova, Frantisek Lukac, Jan Bohlen, Frantisek Chmelik, Robert Kral
Summary: This study utilized the spark plasma sintering (SPS) technique to prepare a Mg-4wt.%Y-3wt.%Nd material (WN43) with outstanding mechanical properties and excellent plastic elongation. By suppressing the detrimental effect of oxide shells on the powder particles, the strong interconnection of the particles was achieved. The material retained the fine powder microstructure and exhibited ductility and strength comparable to conventionally-prepared Mg-RE alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Mary A. Awotunde, Peter A. Olubambi, Daolun Chen
Summary: In this study, carbon nanotube (CNT)-reinforced NiAl intermetallic composites were produced via powder metallurgy. The compressive behavior of the sintered NiAl-CNT composites at room temperature was evaluated, with a focus on the toughening mechanisms of the CNT reinforcement and the resulting microstructures. The results showed that the NiAl-0.5 wt% CNT composites exhibited a balanced combination of strength and toughness due to the presence of both coarse and fine bimodal grains in its microstructure.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Anis Aliouat, Guy Antou, Nicolas Pradeilles, Vincent Rat, Alexandre Maitre
Summary: This study aims to investigate the effects of electric/electromagnetic fields generated by pulsed current in Spark Plasma Sintering (SPS) on the sintering mechanisms. The chosen model material was pre-oxidized copper composed of microsized particles. The results showed that increasing the frequency of pulsed current significantly reduces the critical time for electrical transition. Additionally, the coupling between pulsed current and mechanical stress promotes specific mechanisms in SPS.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Muthuchamy AyyappaRaj, Digvijay Yadav, Dinesh K. Agrawal, Raja Annamalai Arunjunai Rajan
Summary: By adding La(2)O(3) to WHA with a ternary composition of W-7Ni-3Fe, this study achieved control over sintered density, grain size, hardness, and UTS, providing important references for the preparation of the alloy.
Article
Engineering, Multidisciplinary
B. S. Lakshmi Prasad, A. Raja Annamalai
Summary: The study demonstrates that adding Rhenium to traditional Tungsten heavy alloys improves their mechanical properties, making them suitable for applications requiring high strength and density.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Luosheng Ma, Lili Ma, Peipeng Jin, Xinya Feng
Summary: ZK60 magnesium alloy was prepared using the spark plasma sintering technique at different temperatures, and the effects of temperature on the microstructure and mechanical properties were investigated. The results showed that the alloy sintered at 400 degrees C had the highest relative density and the most favorable mechanical properties among the three alloys.
MATERIALS SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Benjamin Guennec, David Tingaud, Remy Pires-Brazuna, Loic Perriere, Noriyo Horikawa, Guy Dirras
Summary: In order to improve the cold-work capacity of tungsten alloys, pure tungsten powder was doped with 1 wt% nickel and consolidated by spark plasma sintering at different temperatures. The addition of nickel removes oxygen from tungsten grain boundaries. The mechanical properties of the obtained materials were significantly improved, mainly due to the elimination of oxygen at the grain boundaries and deformation accommodation by the nickel-rich phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Metallurgy & Metallurgical Engineering
Janet M. Meier, Josh Caris, Alan A. Luo
Summary: Mg-rare earth (RE) based systems offer commercial alloys and alloy development opportunities for high strength applications. Phase diagrams and strengthening mechanisms in these complex systems, including precipitation and LPSO phases, are critical for understanding and enhancing alloy properties. Further research is necessary to explore the combination of these phases for alloy design and industrial applications.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Review
Metallurgy & Metallurgical Engineering
Janet M. Meier, Josh Caris, Alan A. Luo
Summary: Mg-rare earth (RE) based systems offer important commercial alloys and opportunities for high strength applications. The phase diagrams, microstructure, and strengthening mechanisms of these systems are complex. This review provides critical insights into phase equilibria and strengthening mechanisms, highlights the combination of precipitation and long period stacking order (LPSO) phases for superior strength and ductility in Mg-RE based cast alloys, and suggests future research directions for alloy design and industrial scale applications.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Chemistry, Physical
Mathieu Mondet, Elodie Barraud, Sebastien Lemonnier, Nathalie Allain, Thierry Grosdidier
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Polymer Science
Jean-Charles Sebileau, Sebastien Lemonnier, Elodie Barraud, Marie-France Vallat, Adele Carrado, Michel Nardin
JOURNAL OF APPLIED POLYMER SCIENCE
(2017)
Article
Materials Science, Ceramics
Caroline Gajdowski, Judith Bohmler, Yannick Lorgouilloux, Sebastien Lemonnier, Sophie d'Astorg, Elodie Barraud, Anne Leriche
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2017)
Article
Materials Science, Multidisciplinary
Subrata Panda, Laszlo S. Toth, Jean-Jacques Fundenberger, Olivier Perroud, Julien Guyon, Jianxin Zou, Thierry Grosdidier
MATERIALS CHARACTERIZATION
(2017)
Article
Nanoscience & Nanotechnology
H. Queudet, S. Lemonnier, E. Barraud, J. Ghanbaja, N. Allain, E. Gaffet
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2017)
Article
Nanoscience & Nanotechnology
H. Queudet, S. Lemonnier, E. Barraud, J. Guyon, J. Ghanbaja, N. Allain, E. Gaffet
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2017)
Article
Chemistry, Multidisciplinary
O. Gerber, B. P. Pichon, D. Ihiawakrim, I. Florea, S. Moldovan, O. Ersen, D. Begin, J. -M. Greneche, S. Lemonnier, E. Barraud, S. Begin-Colin
Article
Optics
S. Bigotta, L. Galecki, A. Katz, J. Bohmler, S. Lemonnier, E. Barraud, A. Leriche, M. Eichhorn
Article
Chemistry, Physical
Antoine Guitton, Hana Kriaa, Emmanuel Bouzy, Julien Guyon, Nabila Maloufi
Article
Materials Science, Ceramics
Florimond Delobel, Sebastien Lemonnier, Elodie Barraud, Julien Cambedouzou
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2019)
Article
Polymer Science
Jean-Charles Sebileau, Sebastien Lemonnier, Elodie Barraud, Marie-France Vallat, Adele Carrado, Michel Nardin
JOURNAL OF APPLIED POLYMER SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
J. Zollinger, B. Rouat, J. Guyon, S. K. Pillai, M. Rappaz
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2019)
Article
Chemistry, Physical
Meriem Ben Haj Slama, Nabila Maloufi, Julien Guyon, Slim Bahi, Laurent Weiss, Antoine Guitton
Article
Materials Science, Ceramics
Florimond Delobel, Sebastien Lemonnier, Raffaele D'Elia, Julien Cambedouzou
CERAMICS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
C. Ernould, V. Taupin, B. Beausir, J. J. Fundenberger, N. Maloufi, J. Guyon, E. Bouzy
Summary: In this study, a high-angular resolution electron backscatter diffraction technique based on global image registration of Kikuchi patterns is used to investigate a nanopipe threading screw dislocation in a GaN layer. The experimental and simulated results qualitatively agree, indicating the presence of a screw dislocation with a Burgers vector magnitude of 3c = 1.56 nm.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Y. Liu, K. Zweiacker, C. Liu, J. T. McKeown, J. M. K. Wiezorek
Summary: The evolution of rapid solidification microstructure and solidification interface velocity of hypereutectic Al-20at.%Cu alloy after laser melting has been studied experimentally. It was found that the formation of microstructure was dominated by eutectic, alpha-cell, and banded morphology grains, and the growth modes changed with increasing interface velocity.
Article
Materials Science, Multidisciplinary
Bharat Gwalani, Julian Escobar, Miao Song, Jonova Thomas, Joshua Silverstein, Andrew Chihpin Chuang, Dileep Singh, Michael P. Brady, Yukinori Yamamoto, Thomas R. Watkins, Arun Devaraj
Summary: Castable alumina forming austenitic alloys exhibit superior creep life and oxidation resistance at high temperatures. This study reveals the mechanism behind the enhanced creep performance of these alloys by suppressing primary carbide formation and offers a promising alloy design strategy for high-temperature applications.
Article
Materials Science, Multidisciplinary
Jian Song, Qi Zhang, Songsong Yao, Kunming Yang, Houyu Ma, Jiamiao Ni, Boan Zhong, Yue Liu, Jian Wang, Tongxiang Fan
Summary: Recent studies have shown that achieving an atomically flat surface for metals can greatly improve their oxidation resistance and enhance their electronic-optical applications. Researchers have explored the use of graphene as a covering layer to achieve atomically flat surfaces. They found that high-temperature deposited graphene on copper surfaces formed mono-atomic steps, while annealed copper and transferred graphene on copper interfaces formed multi-atomic steps.
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Materials Science, Multidisciplinary
P. Jannotti, B. C. Hornbuckle, J. T. Lloyd, N. Lorenzo, M. Aniska, T. L. Luckenbaugh, A. J. Roberts, A. Giri, K. A. Darling
Summary: This work characterizes the thermo-mechanical behavior of bulk nanocrystalline Cu-Ta alloys under extreme conditions. The experiments reveal that the alloys exhibit unique mechanical properties, behaving differently from conventional nanocrystalline Cu. They do not undergo grain coarsening during extrusion and exhibit behavior similar to coarse-grained Cu.
Article
Materials Science, Multidisciplinary
Yiqing Wei, Jingwei Li, Daliang Zhang, Bin Zhang, Zizhen Zhou, Guang Han, Guoyu Wang, Carmelo Prestipino, Pierric Lemoine, Emmanuel Guilmeau, Xu Lu, Xiaoyuan Zhou
Summary: This study proposes a new strategy to modify microstructure by phase regulation, which can simultaneously enhance carrier mobility and reduce lattice thermal conductivity. The addition of Cu in layered SnSe2 induces a phase transition that leads to increased grain size and reduced stacking fault density, resulting in improved carrier mobility and lower lattice thermal conductivity.
Article
Materials Science, Multidisciplinary
Jia Chen, Zhengyu Zhang, Eitan Hershkovitz, Jonathan Poplawsky, Raja Shekar Bhupal Dandu, Chang-Yu Hung, Wenbo Wang, Yi Yao, Lin Li, Hongliang Xin, Honggyu Kim, Wenjun Cai
Summary: In this study, the structural origin of the pH-dependent repassivation mechanisms in multi-principal element alloys (MPEA) was investigated using surface characterization and computational simulations. It was found that selective oxidation in acidic to neutral solutions leads to enhanced nickel enrichment on the surface, resulting in reduced repassivation capability and corrosion resistance.
Article
Materials Science, Multidisciplinary
X. Y. Xu, C. P. Huang, H. Y. Wang, Y. Z. Li, M. X. Huang
Summary: The limited slip systems of magnesium (Mg) and its alloys hinder their wide applications. By conducting tensile straining experiments, researchers discovered a rate-dependent transition in the dislocation mechanisms of Mg alloys. At high strain rates, glissile dislocations dominate, while easy-glide dislocations dominate at low strain rates. Abundant glissile dislocations do not necessarily improve ductility.
Article
Materials Science, Multidisciplinary
M. S. Szczerba, M. J. Szczerba
Summary: Inverse temperature dependences of the detwinning stress were observed in face-centered cubic deformation twins in Cu-8at.%Al alloy. The detwinning stress increased with temperature when the pi detwinning mode was involved, but decreased when the pi/3 mode was involved. The dual effect of temperature on the detwinning stress was due to the reduction of internal stresses pre-existing within the deformation twins. The complete reduction of internal stresses at about 530 degrees C led to the equivalence of the critical stresses of different detwinning modes and a decrease in the yield stress anisotropy of the twin/matrix structure.
Article
Materials Science, Multidisciplinary
Taowen Dong, Tingting Qin, Wei Zhang, Yaowen Zhang, Zhuoran Feng, Yuxiang Gao, Zhongyu Pan, Zixiang Xia, Yan Wang, Chunming Yang, Peng Wang, Weitao Zheng
Summary: The interaction between the electrode and the electric double layer (EDL) significantly influences the energy storage mechanism. By studying the popular alpha-Fe2O3 electrode and the EDL interaction, we find that the energy storage mechanism of the electrode can be controlled by modulating the EDL.
Article
Materials Science, Multidisciplinary
Matthew R. Barnett, Jun Wang, Sitarama R. Kada, Alban de Vaucorbeil, Andrew Stevenson, Marc Fivel, Peter A. Lynch
Summary: The elastic-plastic transition in magnesium alloy Mg-4.5Zn exhibits bursts of deformation, which are characterized by sudden changes in grain orientation. These bursts occur in a coordinated manner among nearby grains, with the highest burst rate observed at the onset of full plasticity. The most significant burst events are associated with twinning, supported by the observation of twinned structures using electron microscopy. The bursts are often preceded and followed by a stasis in peak movement, indicating a certain "birth size" for twins upon formation and subsequent growth at a later stage.
Article
Materials Science, Multidisciplinary
Vaidehi Menon, Sambit Das, Vikram Gavini, Liang Qi
Summary: Understanding solute segregation thermodynamics is crucial for investigating grain boundary properties. The spectral approach and thermodynamic integration methods can be used to predict solute segregation behavior at grain boundaries and compare with experimental observations, thus aiding in alloy design and performance control.
Article
Materials Science, Multidisciplinary
Feiyu Qin, Lei Hu, Yingcai Zhu, Yuki Sakai, Shogo Kawaguchi, Akihiko Machida, Tetsu Watanuki, Yue-Wen Fang, Jun Sun, Xiangdong Ding, Masaki Azuma
Summary: This study reports on the negative and zero thermal expansion properties of Cd2Re2O7 and Cd1.95Ni0.05Re2O7 materials, along with their ultra-low thermal conductivity. Through investigations of their structures and phonon calculations, the synergistic effect of local structure distortion and soft phonons is revealed as the key to achieving these distinctive properties.
Article
Materials Science, Multidisciplinary
Thomas Beerli, Christian C. Roth, Dirk Mohr
Summary: A novel testing system for miniature specimens is designed to characterize the plastic response of materials for which conventional full-size specimens cannot be extracted. The system has an automated operation process, which reduces the damage to specimens caused by manual handling and improves the stability of the test results. The experiments show that the miniature specimens extracted from stainless steel and aluminum have high reproducibility, and the results are consistent with those of conventional-sized specimens. A correction procedure is provided to consider the influence of surface roughness and heat-affected zone caused by wire EDM.
Article
Materials Science, Multidisciplinary
Rani Mary Joy, Paulius Pobedinskas, Nina Baule, Shengyuan Bai, Daen Jannis, Nicolas Gauquelin, Marie-Amandine Pinault-Thaury, Francois Jomard, Kamatchi Jothiramalingam Sankaran, Rozita Rouzbahani, Fernando Lloret, Derese Desta, Jan D'Haen, Johan Verbeeck, Michael Frank Becker, Ken Haenen
Summary: This study investigates the influence of film microstructure and composition on the Young's modulus and residual stress in nanocrystalline diamond thin films. The results provide insights into the mechanical properties and intrinsic stress sources of these films, and demonstrate the potential for producing high-quality nanocrystalline diamond films under certain conditions.
