Article
Metallurgy & Metallurgical Engineering
R. Bakhshi, M. H. Farshidi, S. A. Sajjadi
Summary: The study shows that a superior strengthening effect is achieved through the imposition of severe plastic deformation supplemented by post-deformation natural ageing. The yield strength of the alloy increases to over 400 MPa, which is about one-third higher than the value obtained after the usual T6 treatment. This superior strength is mainly attributed to grain refinement, increased dislocation density, and an increased volume fraction of precipitates during natural ageing.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Materials Science, Multidisciplinary
Xi Wang, Zhusheng Shi, Chaoyang Sun, Jianguo Lin
Summary: This study investigates the anisotropy evolution of a 3rd generation Al-Li alloy after subjecting it to increased tensile pre-deformation at different angles. The research found that the creep deformation and inplane anisotropy decrease with increasing tensile pre-deformation.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Kai Chen, Qunbo Fan, Shun Xu, Jiahao Yao, Lin Yang, Jingjiu Yuan, Haichao Gong, Hongmei Zhang, Xingwang Cheng
Summary: To achieve a balance between strength and ductility in a novel titanium alloy Ti-6Mo-3.5Cr-1Zr, the transition of microstructure from stress-induced beta to omega phase was intentionally retarded by designing an alpha-beta hybrid structure. Through microstructure optimization, the titanium alloy exhibited outstanding quasi-static tensile properties, with a yield strength of approximately 825 MPa, true tensile strength of approximately 1171 MPa, and total elongation of approximately 29.7%.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Civil
Vincenzo Piluso, Alessandro Pisapia
Summary: This paper presents a theoretical approach for predicting the ultimate resistance of aluminium alloy members subjected to local buckling under uniform compression, focusing on box sections. The theory considers the variability of Poisson's ratio, develops the differential equation of plates at the onset of buckling, and analyses the interactive buckling in the elastic or plastic range. The accuracy of the plastic buckling theory is validated by comparing theoretical predictions with values from stub column tests and proposing advances in the effective thickness approach.
THIN-WALLED STRUCTURES
(2021)
Article
Nanoscience & Nanotechnology
Iuliia Morozova, Aleksandra Krolicka, Aleksei Obrosov, Yitong Yang, Nikolay Doynov, Sabine Weiss, Vesselin Michailov
Summary: This study elucidates the microhardness variations across the friction stir welded and impulse friction stir welded AA2024-T351 joints, with a special focus on the distinguished hardness peak within the heat-affected zone of the impulse welds. The hardness variation and microstructure evolution are analyzed to reveal the influence mechanisms of different welding techniques on material hardness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
C. J. Barr, K. Xia
Summary: The influence of particle size and morphology on grain refinement in low stacking fault energy alloys was investigated, showing different mechanisms in recrystallization process for various particles. The orientation of lamellar structures relative to ECAP plays a significant role in grain refinement.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
P. Snopinski, Ondrej Hilser, Jiri Hajnys
Summary: This study investigates the typical structural defects caused by severe plastic deformation in an L-PBF AlSi10Mg alloy with different microstructural properties using scanning electron microscopy and high-resolution transmission electron microscopy. Microscopic characterization reveals that the deformed alloy exhibits a heterogeneous microstructure with Al/Si interfaces and a high density of dislocations, stacking faults, and nanotwins. Experimental data shows that high stresses build up at the Al/Si interface, activating novel deformation modes that control the plastic deformation of the hard Si twin phase and amorphization in the solid state. The revealed synergy and novel deformation modes have implications for the development of next-generation structural materials and provide insights into the atomically resolved structures of dislocations and GBs in nanostructured L-PBF alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Monika Antoni, Florian Spieckermann, Niklas Plutta, Christoph Gammer, Marlene Kapp, Parthiban Ramasamy, Christian Polak, Reinhard Pippan, Michael J. J. Zehetbauer, Juergen Eckert
Summary: The effects of severe plastic deformation (SPD) by means of high-pressure torsion (HPT) on Fe73.9Cu1Nb3Si15.5B6.6 and Fe81.2Co4Si0.5B9.5P4Cu0.8 iron-based metallic glasses were compared. HPT processing extended the consolidation and deformation ranges for Fe73.9Cu1Nb3Si15.5B6.6, and achieved consolidation and deformation with minimum cracks for Fe81.2Co4Si0.5B9.5P4Cu0.8 for the first time. Various analyses revealed that Fe81.2Co4Si0.5B9.5P4Cu0.8 exhibited HPT-induced crystallization phenomena, while Fe73.9Cu1Nb3Si15.5B6.6 did not crystallize even at high HPT-deformation degrees.
Article
Materials Science, Multidisciplinary
Huan Zhang, Yangxin Li, Yuxuan Liu, Qingchun Zhu, Xixi Qi, Gaoming Zhu, Jinhui Wang, Peipeng Jin, Xiaoqin Zeng
Summary: This study investigates the features and evolution mechanism of {11 (2) over bar1} twin boundaries in a high strain rate compressed Mg-10Gd-3Y-0.4Zr alloy using Schmid factor calculations, EBSD, and TEM analysis. The interaction between basal < a > dislocations and twins during deformation can lead to misorientation deviation and the formation of steps at the twin boundary, providing a new understanding of twinning behavior in Mg alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Seyed Elias Mousavi, Ali Sonboli, Mahmood Meratian, Mohabbat Amirnejad, Seyed Hadi Mohamadi Azghandi, Paul Munroe
Summary: The study shows that low stacking fault energy alloys processed by ECAP can achieve unexpected mechanical properties, with high ductility reaching up to -80% while maintaining good tensile strength. The investigation of alloy microstructure reveals a combination of deformation mechanisms, including slip and twinning, accompanied by grain boundary serration and grain fragmentation. These deformation modes trigger the unexpected mechanical properties in this alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Mingao Li, Shulong Xiao, Lijuan Xu, Jing Tian, Yuyong Chen
Summary: The study shows that dispersive perovskite-Ti3AlC can strengthen TiAl alloys and contribute to better plastic deformation and elongation in high niobium containing TiAl alloys. Transmission electron microscopy and high-resolution transmission electron microscopy reveal the dislocation gliding and twinning mechanism during plastic deformation, as well as the relationship between perovskite-Ti3AlC and the neighboring matrix phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Masaki Tanaka, Masanori Takenaka, Shigeto Yamasaki, Tatsuya Morikawa
Summary: The effect of carbon on the persistence of slip in Fe-3 mass% Si was studied using micro-sized cantilever bending tests. The obtained psi-chi relationship allowed for quantitative analysis of slip persistence. The results from decarburized specimens were consistent with previous studies using bulk-sized tensile test specimens, providing an alternative method for investigating slip persistence. The slip persistence weakened in aged specimens containing 0.016 mass% C and disappeared in quenched specimens with the same carbon content, indicating a relationship between slip persistence and resolved shear stress in competitive {110} planes.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Mariana P. Medeiros, Amanda P. Carvalho, Augusta Isaac, Conrado R. M. Afonso, Milos Janecek, Peter Minarik, Mayerling Martinez Celis, Roberto B. Figueiredo
Summary: The effect of high pressure torsion processing on the mechanical properties and corrosion behavior of various magnesium alloys was studied. Severe plastic deformation processing improved the strength of all alloys, but deformation localization occurred in the Mg-Zn-Ca and Mg-Y-RE alloys. Pure magnesium, Mg-Zn, and Mg-Li-Y alloys exhibited good corrosion resistance with low corrosion rates and maintained integrity after 28 days of immersion.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Yu Gamin, Jairo Alberto Munoz Bolanos, A. S. Aleschenko, A. A. Komissarov, N. S. Bunits, D. A. Nikolaev, A. Fomin, V. V. Cheverikin
Summary: The semi-finished products from a Cu-Ni-Cr-Si alloy are produced for electrical purposes through radial-shear rolling (RSR) and heat treatment, resulting in improved mechanical properties and electrical conductivity. The alloy is thermally hardened after heat treatment due to the precipitation of fine inclusions uniformly distributed in the sample volume, leading to enhanced mechanical properties and electrical conductivity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Martin Stueckler, Stefan Wurster, Markus Alfreider, Michael Zawodzki, Heinz Krenn, Andrea Bachmaier
Summary: This study investigates the structural evolution and magnetic properties of Co-Zr composite through high-pressure torsion processing and subsequent thermal treatment. The results demonstrate that severe plastic deformation can result in an amorphous microstructure with low coercivity and different annealed states can further modify the magnetic properties.
Article
Materials Science, Multidisciplinary
Guilhem Martin, Chad W. Sinclair, Warren J. Poole, Hamid Azizi-Alizamini
Article
Nanoscience & Nanotechnology
G. Badinier, C. W. Sinclair, X. Sauvage, X. Wang, V. Bylik, M. Goune, F. Danoix
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2015)
Article
Materials Science, Multidisciplinary
C. W. Sinclair, G. Martin, R. A. Lebensohn
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2015)
Article
Materials Science, Multidisciplinary
A. Shadkam, C. W. Sinclair
PHILOSOPHICAL MAGAZINE LETTERS
(2015)
Article
Materials Science, Multidisciplinary
E. Dontsova, J. Rottler, C. W. Sinclair
Article
Materials Science, Multidisciplinary
Joel Berry, Joerg Rottler, Chad W. Sinclair, Nikolas Provatas
Article
Nanoscience & Nanotechnology
A. Fillon, X. Sauvage, B. Lawrence, C. Sinclair, M. Perez, A. Weck, E. Cantergiani, T. Epicier, C. P. Scott
SCRIPTA MATERIALIA
(2015)
Article
Materials Science, Multidisciplinary
A. T. Wicaksono, C. W. Sinclair, M. Militzer
COMPUTATIONAL MATERIALS SCIENCE
(2016)
Article
Materials Science, Multidisciplinary
A. Shinbine, T. Garcin, C. Sinclair
MATERIALS CHARACTERIZATION
(2016)
Article
Nanoscience & Nanotechnology
G. Nayyeri, W. J. Poole, C. W. Sinclair, S. Zaefferer, P. J. Konijnenberg, C. Zambaldi
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2016)
Article
Materials Science, Multidisciplinary
M. Militzer, J. J. Hoyt, N. Provatas, J. Rottler, C. W. Sinclair, H. S. Zurob
Article
Nanoscience & Nanotechnology
G. Badinier, C. W. Sinclair, S. Allain, O. Bouaziz
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2014)
Article
Materials Science, Multidisciplinary
M. Sohi, W. J. Poole, C. W. Sinclair, M. Gallerneault
MATERIALS SCIENCE AND TECHNOLOGY
(2015)
Proceedings Paper
Materials Science, Multidisciplinary
A. T. Wicaksono, M. Militzer, C. W. Sinclair
36TH RISO INTERNATIONAL SYMPOSIUM ON MATERIALS SCIENCE
(2015)
Proceedings Paper
Materials Science, Multidisciplinary
A. de Vaucorbeil, W. J. Poole, C. W. Sinclair
Aluminium Alloys 2014 - ICAA14
(2014)
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.