Article
Materials Science, Multidisciplinary
T. Nakata, C. Xu, S. Kamado
Summary: After cold-rolling an Mg-6Zn-0.3Ca alloy sheet with a strong basal texture, anomalous double twinning occurred with the (0001) pole aligned to the transverse direction. These twins served as nucleation sites for statically recrystallized grains during annealing, resulting in weak texture features in the annealed sheet with transverse-direction split (0001) poles.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Gukin Han, Yeonju Noh, Umer Masood Chaudry, Sung Hyuk Park, Kotiba Hamad, Tea-Sung Jun
Summary: The study found that Mg-0.5Ca alloy exhibits temperature-insensitive hardening behavior, while pronounced twinning activity was observed in pure Mg when deformed at low temperatures. The microstructure of Mg-0.5Ca helps reduce twinning behavior, resulting in its hardening behavior being temperature-dependent.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Iniobong P. Etim, Wen Zhang, Yi Zhang, Lili Tan, Ke Yang
Summary: Compressive stress has a greater impact on the corrosion rate of Mg-2Zn-0.5Nd alloy compared to tensile stress, due to the introduction of dislocation slip and deformation twins which accelerate corrosion rate. Tension twinning and prismatic slip occur during tensile deformation, while basal slip and tension twinning occur during compressive deformation. Twinning activity increases with plastic strain, correlating with degradation rate.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Nicolo M. Della Ventura, Szilvia Kalacska, Daniele Casari, Thomas E. J. Edwards, Amit Sharma, Johann Michler, Roland Loge, Xavier Maeder
Summary: The study of extension twinning mechanism in magnesium at the micron scale revealed that basal slip triggers {10(1) over bar2} twin nucleation and favors twin growth, while pyramidal slip leads to limited {10(1) over bar2} twin growth. The critical resolved shear stress for {10(1) over bar2} twinning was found to be ten times higher than in bulk material, indicating higher ductility in the tested samples.
MATERIALS & DESIGN
(2021)
Article
Nanoscience & Nanotechnology
Evgenii Vasilev, Marko Knezevic
Summary: Microstructural heterogeneities in coarse-grained Mg during plastic deformation play a significant role in damage formation and fracture behavior. Twining and voids formation are observed, with distinct effects on material softening and localization of deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Filip Siska, Daria Drozdenko, Kristian Mathis, Jan Cizek, Tingting Guo, Matthew Barnett
Summary: The present study focuses on analyzing the stress and strain distribution inside and around the {10-12} twin in magnesium alloy. A 3D crystal plasticity model is used to represent the twin as an ellipsoidal inclusion surrounded by the matrix. The simulation results are consistent with experimental observations, showing a similar distribution of shear stress and activity of slip systems. Plasticity inside the twin is primarily caused by prismatic dislocation slip and does not affect twin back stress. The lateral propagation of the twin is influenced by prismatic and pyramidal slip in the twin vicinity, and the thickness of the twin is limited by the critical resolved shear stress values for dislocation slip, with basal slip playing a significant role.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Metallurgy & Metallurgical Engineering
Yuzhi Zhu, Dewen Hou, Qizhen Li
Summary: The twinning and detwinning behavior, as well as slip behavior, were studied in a textured AZ31 magnesium alloy under compressive and tensile strains along the rolling direction. The results showed that twinning initially occurred under compressive strain, while detwinning took place under reversed tensile strain. Slips were also activated to accommodate plastic deformation.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Jae-Yeon Kim, Ki-Tae Yoo, Jai-Won Byeon
Summary: In this study, the effects of discontinuous precipitate (DP) and continuous precipitate (CP) on the tensile elongation and fracture mechanism of aging-treated AZ91D Mg alloy were investigated. The increase in area fraction of DPs was found to cause a slight decrease in tensile elongation due to cracking along grain boundaries. Experimental results also showed that a large number of fine tension twins were produced within a few percent of tensile elongation for specimens with high CP/alpha-Mg interfaces per unit volume, leading to premature fracture.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Jan Dittrich, Gergely Farkas, Daria Drozdenko, Michal Knapek, Kristian Mathis, Peter Minarik
Summary: A combination of advanced in-situ experimental techniques, including neutron diffraction, acoustic emission, and electron backscattered diffraction, was used to investigate the deformation behavior of magnesium alloys. The potential and limitations of these techniques were demonstrated in a study on the influence of crystallographic texture on deformation mechanisms in a hot-rolled sheet of the AZ31 alloy. The results showed the twinning activity and its evolution, as well as the deformed microstructure, providing valuable insights into the deformation mechanisms of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Daniel J. Savage, Rodney J. McCabe, Marko Knezevic
Summary: This paper presents a set of algorithms for automatic reconstruction of deformation twin hierarchies in heavily twinned microstructures. By addressing key issues such as twin relationships, grain grouping, and constructing twin family trees, the automation level in reconstructing twin hierarchies under large strains is significantly improved.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
J. X. Wei, H. Yan, R. S. Chen
Summary: This study investigates the mechanical properties and fracture mechanisms of cast Mg-6Gd-3Y-0.4Zr (GW63) alloy with geometrical discontinuities induced by notches. It is found that cleavage micro-cracking behavior dominates notch fracture, which is rare for conventional Mg alloys. The accumulation and coalescence of cleavage microcracks initiate failure near the notch.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Letter
Nanoscience & Nanotechnology
Cyril Cayron
Summary: We agree with the comment by Lin et al. (2022) that the interpretation we proposed to explain the twins formed in a single crystal of magnesium (Cayron and Loge, 2018) was incorrect.
SCRIPTA MATERIALIA
(2023)
Editorial Material
Nanoscience & Nanotechnology
F. X. Lin, C. C. Wu, X. Y. Fang, H. Liu, J. F. Nie
Summary: This paper reveals that the so-called unconventional twins reported by Cayron and Loge' are actually conventional extension twins that have impinged with each other, leading to the formation of an invariant boundary.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Hossein Fallahi
Summary: This study used quasi in situ EBSD to monitor the texture evolution of extruded magnesium alloy samples under cyclic tensile loading-unloading. The formation of twins was found to be dependent on slip and twin activity in neighboring grains. Slip-trace analysis showed traces on different glide planes, and overlapping EBSD maps revealed the formation of primary and secondary twins. The position and orientation of the twins were calculated, and it was observed that twin interactions with dislocations can lead to damage accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Hossein Fallahi, Chris Davies
Summary: This study investigated the microstructure and texture evolution of magnesium alloy samples during cyclic loading, revealing the formation of twin chains and the impact of pre-compression on material behavior. Twin transmission frequency decreases with increasing grain boundary angles, and the presence of residual primary twins in pre-compressed material leads to early formation of secondary twinning.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
D. K. Francis, W. R. Whittington, W. B. Lawrimore, P. G. Allison, S. A. Turnage, J. J. Bhattacharyya
EXPERIMENTAL MECHANICS
(2017)
Article
Engineering, Mechanical
S. A. Brauer, W. R. Whittington, K. L. Johnson, B. Li, H. Rhee, P. G. Allison, C. K. Crane, M. F. Horstemeyer
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
(2017)
Article
Nanoscience & Nanotechnology
O. G. Rivera, P. G. Allison, J. B. Jordon, O. L. Rodriguez, L. N. Brewer, Z. McClelland, W. R. Whittington, D. Francis, J. Su, R. L. Martens, N. Hardwick
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2017)
Article
Materials Science, Multidisciplinary
Abby R. Cisko, James B. Jordon, Dustin Z. Avery, Tian Liu, Luke N. Brewer, Paul G. Allison, Ricolindo L. Carino, Youssef Hammi, Timothy W. Rushing, Lyan Garcia
Article
Materials Science, Multidisciplinary
Ben A. Rutherford, Dustin Z. Avery, Brandon J. Phillips, Harish M. Rao, Kevin J. Doherty, Paul G. Allison, Luke N. Brewer, J. Brian Jordon
Article
Materials Science, Multidisciplinary
Jonathan L. Priedeman, Brandon J. Phillips, Jessica J. Lopez, Brett E. Tucker Roper, B. Chad Hornbuckle, Kristopher A. Darling, J. Brian Jordon, Paul G. Allison, Gregory B. Thompson
Article
Chemistry, Physical
Brandon J. Phillips, C. Jacob Williamson, Ryan P. Kinser, J. Brian Jordon, Kevin J. Doherty, Paul G. Allison
Summary: AFS-D is a transformative metallic AM process capable of producing near-net shape components with a wide variety of material systems. The solid-state nature of the process allows for successful deposition of materials without common defects seen in other metallic AM technologies. The study found significant grain refinement and impact on material properties from the AFS-D process, and noted that recommended lubrication for feedstock rods may not be effectively dispersed into the structure, affecting bonding between layers.
Article
Materials Science, Multidisciplinary
Ning Zhu, Dustin Z. Avery, Ben A. Rutherford, Brandon J. Phillips, Paul G. Allison, J. Brian Jordon, Luke N. Brewer
Summary: This study shows that the thickness of oxide coatings does not significantly affect the yield and tensile strengths of feedstock materials in the additive friction stir-deposition process, but it does decrease the elongation-to-failure of the materials.
Article
Materials Science, Multidisciplinary
M. B. Williams, T. W. Robinson, C. J. Williamson, R. P. Kinser, N. A. Ashmore, P. G. Allison, J. B. Jordon
Summary: The effect of processing parameters on WE43 magnesium alloy processed via Additive Friction Stir Deposition (AFSD) was investigated. A parameterization study identified suitable parameters for bulk WE43 deposition, resulting in a refined homogenous microstructure and specific changes in mechanical properties compared to wrought material. Fatigue life in the low-cycle regime was decreased in as-deposited WE43, but comparable to wrought material in the high-cycle regime, demonstrating the potential of AFSD process for additively manufactured load-bearing components with WE43 magnesium alloy.
Article
Chemistry, Multidisciplinary
Lesa Brown, Catherine S. Stephens, Paul G. Allison, Florence Sanchez
Summary: The study investigated the influence of adding carbon nanofibers (CNFs) on the micromechanical properties of cement paste, revealing that CNFs promoted the formation of higher modulus C-S-H phases in the paste, leading to an increase in the paste's elastic modulus.
Article
Engineering, Civil
R. P. Kinser, M. E. Barkey, T. W. Rushing, A. R. Cisko, L. Garcia, P. G. Allison, J. B. Jordon
Summary: In this paper, the authors outline the homogenization of the AM2 portable airfield matting system and its interlocking mechanisms, which enable the rapid deployment of infrastructure to support aircraft operations. The study reveals an inherent coupling between load transfer, mat deflection, and near-surface subgrade stress, depending on tire location, mat core shear flexibility, and joint stiffness.
TRANSPORTATION RESEARCH RECORD
(2022)
Article
Engineering, Manufacturing
Glen R. Merritt, Malcolm B. Williams, Paul G. Allison, James B. Jordon, Timothy W. Rushing, Christian A. Cousin
Summary: Additive Friction Stir Deposition (AFSD) is an innovative method in non-beam-based metal additive manufacturing that offers advantages such as high-strength mechanical bonding, joining of dissimilar alloys, and high deposition rates. This study focuses on controlling the temperature and force in the AFSD process to improve its quality and consistency.
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
C. J. T. Mason, P. G. Allison, O. L. Rodriguez, D. Z. Avery, B. J. Phillips, C. Leah, Z. McClelland, T. W. Rushing, L. Garcia, J. B. Jordon
JOURNAL OF DYNAMIC BEHAVIOR OF MATERIALS
(2019)
Article
Engineering, Biomedical
K. L. Johnson, M. W. Trim, D. K. Francis, W. R. Whittington, J. A. Miller, C. E. Bennett, M. F. Horstemeyer
ACTA BIOMATERIALIA
(2017)
Article
Engineering, Multidisciplinary
Yangqing Dou, Yucheng Liu, Youssef Hammi, Wilburn Whittington
MODELLING AND SIMULATION IN ENGINEERING
(2017)
Article
Nanoscience & Nanotechnology
Jie Zhang, Xiaoyang Chen, MingJian Ding, Jiaqiang Chen, Ping Yu
Summary: This study enhances the compositional inhomogeneity of relaxor ferroelectric thin films to improve their dielectric temperature stability. The prepared films exhibit a relatively high dielectric constant and a very low variation ratio of dielectric constant over a wide temperature range.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xiaoyu Chen, Ranran Zhang, Hao Zou, Ling Li, Qiancheng Zhu, Wenming Zhang
Summary: Polyaniline-manganese dioxide composites exhibit high conductivity, long discharge platform, and stable circulation, and the specific capacity is increased by providing additional H+ ions to participate in the reaction.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xutao Huang, Yinping Chen, Jianjun Wang, Gang Lu, Wenxin Wang, Zan Yao, Sixin Zhao, Yujie Liu, Qian Li
Summary: This study aims to establish a novel approach to better understand and predict the behavior of materials with multi-scale lamellar microstructures. High-resolution reconstruction and collaborative characterization methods are used to accurately represent the microstructure. The mechanical properties of pearlite are investigated using crystal plasticity simulation and in-situ scanning electron microscopy tensile testing. The results validate the reliability of the novel strategy.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Cheng Chen, Fanchao Meng, Jun Song
Summary: This study systematically investigated the unfaulting mechanism of single-layer interstitial dislocation loops in irradiated L12-Ni3Al. The unfaulting routes of the loops were uncovered and the symmetry breaking during the unfaulting processes was further elucidated. A continuum model was formulated to analyze the energetics of the loops and predict the unfaulting threshold.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Darshan Bamney, Laurent Capolungo
Summary: This work investigates the formation of adjoining twin pairs (ATPs) at grain boundaries (GBs) in hexagonal close-packed (hcp) metals, focusing on the co-nucleation (CN) of pairs of deformation twins. A continuum defect mechanics model is proposed to study the energetic feasibility of CN of ATPs resulting from GB dislocation dissociation. The model reveals that CN is preferred over the nucleation of a single twin variant for low misorientation angle GBs. Further analysis considering GB character and twin system alignment suggests that CN events could be responsible for ATP formation even at low m' values.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Bing Han, Zhengqian Fu, Guoxiang Zhao, Xuefeng Chen, Genshui Wang, Fangfang Xu
Summary: This study investigates the behavior of electric-field induced antiferroelectric to ferroelectric (AFE-FE) phase transition and reveals the evolution of atomic displacement ordering as the cause for the transition behavior changing from sharp to diffuse. The novel semi-ordered configuration results from the competing interaction between long-range displacement modulation and compositional inhomogeneity, which leads to a diffuse AFE-FE transition while maintaining the switching field.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Akib Jabed, Golden Kumar
Summary: This study demonstrates that cryogenic rejuvenation promotes homogeneous-like flow and increases ductility in metallic glass samples. Conversely, annealing has the opposite effect, resulting in a smoother fracture surface.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xin Ji, Yan Chong, Satoshi Emura, Koichi Tsuchiya
Summary: A heterogeneous microstructure in Ti-15Mo-3Al alloy with heterogeneous distributions of Mo element and omega(iso) precipitates has achieved a four-fold increase in tensile ductility without a loss of tensile strength, by blocking the propagation of dislocation channels and preventing the formation of micro-cracks.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Amit Samanta, Prasanna Balaprakash, Sylvie Aubry, Brian K. Lin
Summary: This study proposes a combined large-scale first principles approach with machine learning and materials informatics to quickly explore the chemistry-composition space of advanced high strength steels (AHSS). The distribution of aluminum and manganese atoms in iron is systematically explored using first principles calculations to investigate low stacking fault energy configurations. The use of an automated machine learning tool, DeepHyper, speeds up the computational process. The study provides insights into the distribution of aluminum and manganese atoms in systems containing stacking faults and their effects on the equilibrium distribution.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Guowei Zhou, Yuanzhe Hu, Zizheng Cao, Myoung Gyu Lee, Dayong Li
Summary: In this work, a physics-constrained neural network is used to predict grain-level responses in FCC material by incorporating crystal plasticity theory. The key feature, shear strain rate of slip system, is identified based on crystal plasticity and incorporated into the loss function as physical constitutive equations. The introduction of physics constraints accelerates the convergence of the neural network model and improves prediction accuracy, especially for small-scale datasets. Transfer learning is performed to capture complex in-plane deformation of crystals with any initial orientations, including cyclic loading and arbitrary non-monotonic loading.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Pengfei Yang, Qichang Li, Zhongying Wang, Yuxiao Gao, Wei Jin, Weiping Xiao, Lei Wang, Fusheng Liu, Zexing Wu
Summary: In this study, the HER performance of Ru-based catalysts is significantly improved through the dual-doping strategy. The obtained catalyst exhibits excellent performance in alkaline freshwater and alkaline seawater, and can be stably operated in a self-assembled overall water splitting electrolyzer.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ilias Bikmukhametov, Garritt J. Tucker, Gregory B. Thompson
Summary: Depositing a Ni-1at. % P film can facilitate the formation of multiple quintuple twin junctions, resulting in a five-fold twin structure and a pentagonal pyramid surface topology. The ability to control material structures offers opportunities for creating novel surface topologies, which can be used as arrays of field emitters or textured surfaces.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Zening Yang, Weiwei Sun, Zhengyu Sun, Mutian Zhang, Jin Yu, Yubin Wen
Summary: Multicomponent oxides (MCOs) have wide applications and accurately predicting their thermal expansion remains challenging. This study introduces an innovative attention-based deep learning model, which achieves improved performance by using two self-attention modules and demonstrates adaptability and interpretability.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ze Liu, Cai Chen, Yuanxun Zhou, Lanting Zhang, Hong Wang
Summary: This study attempts to address the gap in cooling rates between thin film deposition and bulk metallic glass (BMG) casting by correlating the glass-forming range (GFR) determined from combinatorial materials chips (CMCs) with the glass-forming ability (GFA) of BMG. The results show that the full-width at half maximum (FWHM) of the first sharp diffraction peak (FSDP) is a good indicator of BMG GFA, and strong positive correlations between FWHM and the critical casting diameter (Dmax) are observed in various BMG systems. Furthermore, the Pearson correlation coefficients suggest possible similarities in the GFA natures of certain BMG pairs.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Mike Schneider, Jean-Philippe Couzinie, Amin Shalabi, Farhad Ibrahimkhel, Alberto Ferrari, Fritz Koermann, Guillaume Laplanche
Summary: This work aims to predict the microstructure of recrystallized medium and high-entropy alloys, particularly the density and thickness of annealing twins. Through experiments and simulations, a database is provided for twin boundary engineering in alloy development. The results also support existing theories and empirical relationships.
SCRIPTA MATERIALIA
(2024)