Article
Nanoscience & Nanotechnology
Pengbin Lu, Lifei Wang, Hua Chai, Guangsheng Huang, Honghui Wu, Dabiao Xia, Qiang Zhang, Liwei Lu, Hongxia Wang, Shuyong Jiang, Kwang Seon Shin
Summary: In this study, a novel texture control strategy called shear strain-induced twin orientation regulation (SITOR) was used to fabricate the Mg-3Al-1Zn (AZ31) alloy with improved ductility. The SITOR-1P sample processed at 250 degrees C exhibited a homogeneous microstructure and an ideal shear texture, resulting in significantly enhanced fracture elongation. Increasing shear strain in the SITOR-4P sample further improved its mechanical performance. Conventional shear strain-induced orientation regulation (SIOR) method showed limited texture deflection and performance enhancement. The SITOR scheme offers a fresh perspective for addressing the poor plasticity of Mg.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Pengbin Lu, Lifei Wang, Xiaohuan Pan, Guangsheng Huang, Qiang Zhang, Hua Zhang, Liuwei Zheng, Liwei Lu, Hongxia Wang, Shuyong Jiang, Kwang Seon Shin
Summary: The study investigates the mechanisms of ductility enhancement in AZ31 magnesium alloy using the concept of shear strain-assisted twin orientation regulation (SATOR). Simple shear strain is applied to pre-twinned samples to rotate the twin orientation. The results show that the fracture strain of SATORed samples with the greatest improvement in ductility was 1.5 times higher than that of the original material. Overall, shear-deformed samples exhibit a bimodal fine-grained structure. The improved ductility is attributed to the regulation of initial twin orientation, promoted basal slip activity, and bimodal fine-grained structure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Coatings & Films
J. G. Acheson, E. A. Gallagher, J. Ward, S. McKillop, B. FitzGibbon, A. R. Boyd, B. J. Meenan, P. Lemoine, J. P. McGarry
Summary: Research shows that the effective shear strength of the coating-substrate interface is significantly higher for coatings on rougher substrate surfaces compared to smoother surfaces. Coating thickness was not found to significantly influence the effective shear strength within the range considered in this study (0.37-1.34um).
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Maria Concetta Oddo, Giovanni Minafo, Marielisa Di Leto, Lidia La Mendola
Summary: This paper presents two simplified numerical models for simulating the tensile and shear bond behavior of FRCM composites, using truss and non-linear spring elements to model the material components and the interface. The proposed approach allows for deducing the global mechanical response in terms of stress-strain or stress-slip relations, which is validated against experimental benchmarks available in the literature.
Article
Materials Science, Multidisciplinary
Liangliang Xue, Lifei Wang, Pengbin Lu, Qiang Zhang, Hua Zhang, Guangsheng Huang, Liwei Lu, Liuwei Zheng, Hanuma Reddy Tiyyagura, Hongxia Wang, Shuyong Jiang, Kwang Seon Shin
Summary: Pre-twinning is an effective method to weaken the basal texture and improve the plasticity of magnesium alloys, especially formability. However, the enhancement is limited due to the inability to achieve the largest Schmid factor of basal slip. In this study, a new combination procedure called secondary regulation of initial twin orientation (SRITO) was developed to further decrease the basal texture and improve the formability of AZ31 Mg alloys sheet. By compressing the sheet into pre-twins with different volumes and regulating the twin orientation using in-plane simple shear strain, the average fracture elongation and Erichsen value of the annealed sample were significantly improved compared to the as-received sample.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Engineering, Civil
R. M. O. Pauletti, K. B. Rocha
Summary: In addition to material and geometric stiffness, tension structures are affected by pneumatic stiffness, especially in systems with higher inside pressure. While nonlinear behavior in pneumatic structures typically involves finite strains, simplified material models may be sufficient for low to moderate pressure systems, if a model to deal with membrane wrinkling is accounted for.
ENGINEERING STRUCTURES
(2021)
Article
Pharmacology & Pharmacy
Ryoichi Furukawa, Ravendra Singh, Marianthi Ierapetritou
Summary: The study focuses on the impact of tablet press parameters and mixture composition on the tensile strength, with findings that the feed frame speed and the amount of magnesium stearate play a role in this. Additionally, a lubrication model based on shear extent was presented to predict the decreasing trend of tensile strength during the tableting process, with results showing good agreement with experimental measurements.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2021)
Article
Engineering, Geological
Lin Zhou, Jian-Feng Chen, Xiao-Ying Zhuang
Summary: A series of monotonic and multidirectional cyclic simple shear tests were conducted on reconstituted fiber-reinforced calcareous sand specimens. The results showed that the inclusion of fibers and increasing fiber contents can improve the liquefaction resistance of calcareous sand under cyclic loading. A linear relationship was found between the normalized liquefaction resistance of reinforced sand and the number of cycles for triggering liquefaction. A pore pressure prediction model considering the effect of fiber contents was proposed.
Article
Engineering, Marine
Hongxu Jin, Lin Guo, Honglei Sun, Li Shi, Yuanqiang Cai
Summary: This study experimentally investigates the undrained shear behavior of soft marine clay through monotonic and cyclic simple shear tests, considering the effects of overconsolidated ratio (OCR) and cyclic stress ratio (CSR). An OCR-independent relation between cyclic and monotonic shear strengths is established, and a new empirical model is proposed that incorporates the influences of both OCR and CSR. The datasets of shear modulus and residual pore pressure converge to a narrow band dependent on OCR.
Article
Engineering, Geological
Jonathan F. F. Hubler, Adda Athanasopoulos-Zekkos, Dimitrios Zekkos
Summary: This study evaluated the excess pore pressure generation of uniform gravel and gravel-sand mixtures. Comparisons with existing relationships for sand pore pressure generation were made, revealing that gravel and gravel-sand mixtures exhibit different pore pressure responses. The study investigated the influence of various factors on excess pore water pressure generation, and found that factors such as relative density, particle angularity, and gravel percentage have a significant effect on the response.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Gang Liu, Zhenduo Ma, Yilei Ren, Xi Zhang, Fang Xie
Summary: The microstructure, interface characteristics, and tensile shear strength of AZ31/LZ91 alloys friction stir lap welding were investigated. The results showed differences in grain size and misorientation angle in different regions, while the interface exhibited good connection. The welding speed had an influence on the tensile shear strength.
Article
Engineering, Geological
Hongxu Jin, Lin Guo, Honglei Sun, Tingyu Wu, Li Shi, Yuanqiang Cai
Summary: A laboratory study was conducted to investigate the undrained cyclic behavior of marine soft clay under a complex shear stress state. The results showed that the cyclic strength of the clay was influenced by the direction of shear stress.
Article
Engineering, Geological
Mason Ghafghazi, Mark Talesnick, F. A. Givi
Summary: The simple shear test is an important tool in geotechnical engineering and soil behavior research. It is attractive due to its ease of specimen preparation, similarity to at rest conditions during consolidation, and rotation of principal stresses during shear. However, there are deficiencies in interpreting standard test results, such as unknown horizontal normal stresses and assumptions about constant volume tests without saturation. Monotonic tests on sand were performed to address these issues, revealing problems with estimating excess pore pressures and potentially underestimated friction angles.
Article
Engineering, Chemical
J. Krzyzanowski, J. Tejchman, W. Solowski, M. Wojcik
Summary: This paper focuses on the confined flow of cohesionless sand in a silo using the material point method (MPM). Different initial void ratios and wall roughness were considered in the simulations, with emphasis on the evolution of shear zones and their impact on wall stresses during flow. The numerical findings enhance the understanding of shear localization in granular materials and its effects on wall pressures in confined silo flow.
Article
Engineering, Geological
Giuseppe Tomasello, Daniela Dominica Porcino
Summary: An experimental program on Ticino sand was conducted to investigate the influence of initial static shear stress on failure mechanism, cyclic resistance, and pore water pressure generation. The results showed that the sand exhibited two types of failure mechanisms, cyclic mobility and plastic strain accumulation, depending on the magnitude of the initial static shear stress. The cyclic resistance of the sand was found to either increase or decrease with an increasing initial static shear stress, depending on the density state of the sand. Furthermore, the study suggested that the K alpha correction factors could depend on particle gradations and grain shape.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Mechanical
Chao Wang, Zhijie Xu, Deborah Fagan, David P. Field, Curt Lavender, Vineet V. Joshi
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
(2020)
Article
Materials Science, Multidisciplinary
Maryam Jamalian, David P. Field
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
N. R. Overman, S. Jana, D. P. Field, C. Lavender, V. V. Joshi
JOURNAL OF NUCLEAR MATERIALS
(2020)
Review
Materials Science, Multidisciplinary
A. Heidarzadeh, S. Mironov, R. Kaibyshev, G. Cam, A. Simar, A. Gerlich, F. Khodabakhshi, A. Mostafaei, D. P. Field, J. D. Robson, A. Deschamps, P. J. Withers
Summary: Friction stir welding and friction stir processing offer unique characteristics to control microstructures and improve welding and surface performance. Research focuses on developing a comprehensive understanding of microstructural evolution, with a particular emphasis on mechanisms such as grain structure and phase transformations. Special attention is given to controlling and dispersing intermetallic compounds when joining different metals and alloys.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Amrita Kundu, David P. Field
MATERIALS CHARACTERIZATION
(2020)
Article
Materials Science, Multidisciplinary
Khaled F. Adam, David P. Field
Summary: The mechanical response of polycrystalline materials depends on the microstructure, and introducing limited heterogeneity can help balance the tradeoff between strength and ductility. This study aims to design heterogeneous microstructures using computational tools and experimental methods, and validate the simulation results through mechanical testing and EBSD measurements.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Mehdi Hamid, Maryam Jamalian, Natalia De Vincentis, Quentin Buck, David P. Field
Summary: The severely plastically deformed microstructures of pure copper were produced using high-pressure torsion. The effects of this process on microstructure and mechanical behavior were investigated through experimentation and modeling. The study provides insights into the mechanism and performance of these deformed copper samples.
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Materials Science, Multidisciplinary
Benjamin J. Schuessler, David P. Field, Nicole R. Overman, Vineet V. Joshi
Summary: The crystallographic texture evolution of a uranium alloy with 10 wt pct Mo during manufacturing process was studied. The results showed that the texture of the alloy could be effectively randomized after recrystallization following different reduction thicknesses and annealing treatments.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Microscopy
N. S. De Vincentis, D. P. Field
Summary: This paper discusses the correctness of solutions in automated EBSD analysis systems, finding that about 90% of solutions obtained using a confidence index of 0.1 and at least 8 Hough bands are correct, regardless of crystallographic structure or orientation.
Article
Materials Science, Multidisciplinary
Khaled F. Adam, David P. Field
Summary: In this research, mixed structures were created to produce limited recrystallization by combining soft and hard domains in a single sample. The modified 3D Potts model was used to tailor and model this complex problem by introducing a limited fraction of nucleating grains and controlling structure evolution.
Article
Materials Science, Multidisciplinary
Jacqueline Reeve, Benjamin J. Schuessler, William E. Frazier, David P. Field, Vineet V. Joshi
Summary: Grain boundaries and second phase particles have a significant influence on the recrystallization kinetics of U-10Mo alloy, which is a nuclear fuel relevant to nuclear non-proliferation efforts.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Spectroscopy
Samuel Karcher, Ritesh Mohun, Travis Olds, Marc Weber, Kyle Kriegsman, Xiaodong Zhao, Xiaofeng Guo, Claire Corkhill, David Field, John McCloy
Summary: This paper presents the application of Raman spectroscopy in the study of the structure of UO2 and its changes due to various factors. By utilizing different excitation wavelengths, the effects of doping, irradiation, heating, and oxidation can be assessed. The combination of Raman maps and electron backscatter diffraction allows for correlative microscopy and the investigation of structural rearrangement.
JOURNAL OF RAMAN SPECTROSCOPY
(2022)
Article
Materials Science, Multidisciplinary
Ali Afrouzian, Cory J. Groden, David P. Field, Susmita Bose, Amit Bandyopadhyay
Summary: Bimetallic structures of nickel and commercially pure titanium were successfully manufactured through directed energy deposition metal additive manufacturing, exhibiting different mechanical properties in different configurations. The formation of intermetallic NiTi phase at the interface was confirmed, and a microstructural gradient was observed in the heat-affected zone. The longitudinal and transverse samples showed significant differences in elongation, with the longitudinal samples demonstrating brittle fracture failure during compressive deformation, while the transverse samples exhibited ductile failure.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Amrita Kundu, David P. Field, Pravash Chandra Chakraborti, Parvej Raut
Summary: The dynamic interaction between dislocations and deformation induced martensites and twins in 304 LN austenitic stainless steel was investigated using EBSD and ECCI. It was found that more deformation induced martensites and twins formed at 28 degrees C compared to 350 degrees C, especially in the grains with higher Schmid factors. The larger GND density at 28 degrees C, as measured by EBSD, explains the superior balance of strength and ductility. The rate of increase of GND density with strains and temperatures is not singular and can be explained by higher strain hardening, low dislocation cross-slip and dynamic recovery. The heterogeneity in GND distribution is greater at 28 degrees C due to the presence of martensite, twins, refinement of the co-planar slip band spacings and formation of shear bands. Finer austenite grains sustain larger GND density with temperatures and strains, contributing to forest hardening and the generation of back stress at 28 degrees C.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Maryam Jamalian, Jacqueline I. Reeve, David P. Field
MATERIALS CHARACTERIZATION
(2020)
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.