Article
Materials Science, Multidisciplinary
Caleb P. Massey, Cody J. Havrilak, Maxim N. Gussev, Kurt A. Terrani, Andrew T. Nelson
Summary: UAM was successfully utilized to create a three-dimensional component prototype in the Zirconium material system, resulting in grain size refinement and significant localized deformation. Variations in tensile strength in different directions were observed, but overall, it demonstrated the viability of UAM for Zr-based materials.
Article
Materials Science, Multidisciplinary
Fanbo Meng, Sheng Huang, Kwang Boon Lau, You Zhou, Yuheng Deng, Pei Wang, Xiaojun Shen, Christopher H. T. Lee
Summary: In this study, near grain-oriented and near non-oriented Fe-3.5 wt.%Si silicon steel were fabricated using LPBF, and the effects of processing parameters on the texture evolution and magnetic properties of the silicon steel were investigated. The results showed that the morphology of the molten pool and the grain orientations can be controlled by adjusting the linear energy density, laser power, and scanning speed. This study provides valuable insights into the relationship between processing parameters, texture evolution, and magnetic properties in LPBFed silicon steel.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
F. F. Conde, G. G. Ribamar, J. D. Escobar, A. L. Jardini, M. F. Oliveira, J. P. Oliveira, J. A. Avila
Summary: Maraging steel is sensitive to the precipitation of intermetallics during aging heat treatments. This study used EBSD to analyze the microstructures of maraging steel and found that solubilization of the steel resulted in a more homogeneous microstructure with new grain boundaries. Tempering heat treatments relieved martensite strain and increased band contrast values. Aging had a minimal impact on the EBSD analysis results.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Ming-Wei Wu, Jhewn-Kuang Chen, Mo-Kai Tsai, Shih-Hao Wang, Pang-Hsin Lai
Summary: The study identified the influence of heat treatment temperature on the preferred orientation of LPBF Ti-6Al-4V alloy. Results showed that the preferred orientation of α phase gradually intensified with increasing heat treatment temperature, aligning mostly with the building direction after 950 degrees C heat treatment.
Article
Chemistry, Physical
Ming-Wei Wu, Kai Ni, Hung-Wei Yen, Jhewn-Kuang Chen, Pei Wang, Yu-Jen Tseng, Mo-Kai Tsai, Shih-Hao Wang, Pang-Hsin Lai, Ming-Hsiang Ku
Summary: Heat treatment is a commonly used method to improve the unsatisfactory microstructure and properties of LPBF Ti-6Al-4V. This study aimed to investigate the effects of heat treatment on the preferred orientation and mechanical properties of LPBF Ti-6Al-4V. The results showed that heat treatment temperature influenced the preferred orientation and decomposition of α'-martensite. Additionally, the anisotropic mechanical properties of the specimens were influenced by the heat treatment temperature, with vertically-built specimens exhibiting higher elongation after 950°C heat treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Anton Y. Nikonov, Dmitry V. Lychagin, Artem A. Bibko, Olga S. Novitskaya
Summary: To obtain products using additive manufacturing (AM) methods, the internal structure of the material formed must be considered, which depends on the 3D printing parameters. Computer modeling methods can effectively predict the internal structure by studying the influence of the base structure and heat input on the grain structure of the deposited layers. Numerical models were created using data obtained from electron backscatter diffraction (EBSD) analysis. The amount of heat input was found to determine the degree of melting and the defectiveness of growing crystals.
Article
Nanoscience & Nanotechnology
C. Andrews, T. W. Heo, R. Shi, C. Basgul, S. Kurtz, M. J. Matthews, M. L. Taheri
Summary: This research aims to quantify the microscale origins of strain in L-PBF manufactured Ti-6Al-4V, understand the interplay between phase evolution and strain, and examine post-processing strain relief strategies. The study found that macroscale thermal strains decreased with heat treatment time, but lattice distortive strain remained primarily in the alpha grains. The retention of the beta phase significantly changed the strain and dislocation distribution while reducing overall residual strain.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Crystallography
Gowtham Venkatraman, Leon M. Headings, Marcelo J. Dapino
Summary: This paper investigates the effect of process variables on the microstructure of aluminum 6061 built-up parts using ultrasonic additive manufacturing (UAM). The researchers quantify the degree of recrystallization and develop an energy metric to analyze the welded part. They find that the total energy stored in the weld interface microstructure is about 0.1% of the input energy. The study also compares microstructures of builds prepared under different processing conditions and explores the impact of vibration amplitude and travel speed on the as-built microstructure.
Article
Materials Science, Multidisciplinary
Igor Vysotskiy, Sergey Malopheyev, Ivan Zuiko, Sergey Mironov, Rustam Kaibyshev
Summary: This study focuses on the crystallographic aspects of laser-powder bed fusion of 17-4 PH martensitic steel. The crystallization process showed an epitaxial mechanism and resulted in a specific crystal structure relationship between ferrite and austenite. Grain-boundary austenite was found to have a relationship with adjacent ferrite grains. The phase transformation from austenite to martensite did not exhibit significant variant selection.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Alessandro Carrozza, Alberta Aversa, Federico Mazzucato, Emilio Bassini, Diego Manfredi, Sara Biamino, Anna Valente, Paolo Fino
Summary: This work investigated the effects of different heat treatments on DED-produced Ti-6Al-4V samples. Different microstructures were achieved through annealing treatments, but a grain memory effect causing uneven grain size increase was detected.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Zhongji Sun, Shao-Pu Tsai, Peter Konijnenberg, Ji-Yun Wang, Stefan Zaefferer
Summary: Most microstructure characterization tools are based on 2D observation, which is not sufficient to analyze the microstructures of metal parts fabricated by additive manufacturing (AM) due to their significant differences. Orientation microscopy-based electron backscatter diffraction (EBSD) is a quantitative technique for 2D microstructure characterization and can be extended to a powerful 3D characterization technique by combining with serial sectioning. In this study, a large-volume 3D EBSD system was used to analyze an AM-built 316L stainless steel sample, and unique tree-like grain morphologies and related textures were observed.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Edwin J. Schwalbach, Jake T. Benzing, Vikas Sinha, Todd M. Butler, Adam L. Pilchak, Kevin J. Chaput, Norman D. Schehl, Reji John, Nikolas Hrabe
Summary: Electron beam powder bed fusion scan strategies can lead to variations in crystallographic texture and mechanical properties for Ti-6Al-4V, even below the recommended maximum scan line length. The microstructural attributes are similar for short and long scan line length conditions, but the crystallographic textures vary considerably.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Fulin Wang, Jean-Charles Stinville, Marie Charpagne, McLean P. Echlin, Sean R. Agnew, Tresa M. Pollock, Marc De Graef, Daniel S. Gianola
Summary: Metallic alloys produced by additive manufacturing often have complex microstructures, including orientation gradients and dislocation cells. This study focuses on characterizing these features using electron backscatter diffraction patterns. The sharpness metric employed in this study reflects the elastic strain field from dislocations and exhibits advantages such as being proportional to local dislocation density and insensitive to grain orientation. The results contribute to our understanding of the origin and implications of the dislocation cells produced during additive manufacturing.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Kai Ni, Ming-Hsiang Ku, Yu-Jen Tseng, Hung-Wei Yen, Ming-Wei Wu
Summary: The study reconstructed the prior beta grains of heat-treated LPBF Ti-6Al-4V alloy using crystallography data and found that the orientation relationship in beta to alpha transformation is close to the Burgers orientation relationship. The results also confirmed the orientation inheritance between the reversed beta phase and the prior beta phase. Additionally, it was discovered that the misorientation range of alpha boundaries is nearly identical to the high-angle grain boundaries of the prior beta phase.
Article
Materials Science, Multidisciplinary
Kai Zhang, Xinbao Liu, Ping Fan, Lin Zhu, Kai Wang, Lin Wang, Caili Zhao
Summary: This study investigates the change of geometrically necessary dislocation (GND) during the elevated temperature creep of P91 steel. The results show that the GND density increases significantly during the initial creep stage, reaches a maximum at the transition from initial creep to steady creep, and gradually decreases during subsequent creep. It also demonstrates that the GND density can be used to predict internal stress and analyze microstructure degradation of P91 steel during creep.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Yung Suk Jeremy Yoo, Anastasia Mullins, Sazol Has, DaeHoon Kang, Richard Hamerton, Saransh Singh, Marc De Graef, Josh Kacher
Summary: The influence of dispersoids and grain boundary characteristics on the crack propagation behavior in AA3xxx during deep drawing was investigated, with cracks typically forming on the material surface at the earliest stages of deformation and extending with increasing strain. The cracks propagated along intergranular paths with bifurcations correlating with triple junction locations, but no strong trends were identified linking grain boundary characteristics to crack propagation pathways. Dispersoids at grain boundaries were found to arrest crack propagation and divert crack growth pathways, demonstrating the first practical application of combining the dictionary indexing method with TKD analysis.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
A. Lupinacci, J. Kacher, A. A. Shapiro, P. Hosemann, A. M. Minor
Summary: In situ cryogenic mechanical testing of Sn 96 solder alloy below the DBTT showed that deformation twinning is the primary mechanism in the Sn matrix, with consistent twinning behavior observed in both {301} and {101} crystallographic directions. Slip steps were also observed in the intermetallic phase of Sn96 that were not present before bending.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Sandra Stangebye, Yin Zhang, Saurabh Gupta, Ting Zhu, Olivier Pierron, Josh Kacher
Summary: Transmission electron microscopy (TEM) imaging relies on high energy electrons for atomic scale resolution. The electron beam (e-beam) was found to enhance plastic deformation in nanocrystalline Al, leading to an increase in plastic strain rate and a decrease in activation volume, while having a weaker effect on ultrafine-grained Au. The e-beam effect is due to an effective temperature increase from additional atomic fluctuations.
Article
Engineering, Electrical & Electronic
Josh Kacher, Yao Xie, Sven P. Voigt, Shixiang Zhu, Henry Yuchi, Jordan Key, Surya R. Kalidindi
Summary: This article discusses the combination of signal processing and statistical analysis with TEM data collection capabilities in materials science. It highlights the application of image analysis, feature extraction, and streaming data processing techniques, and presents a future outlook on opportunities for integrating signal processing with automated TEM data analysis.
IEEE SIGNAL PROCESSING MAGAZINE
(2022)
Article
Nanoscience & Nanotechnology
Yung Suk Jeremy Yoo, Yang Su, Sazol Das, Richard Hamerton, Josh Kacher
Summary: This study investigates the microstructural origins and early behavior of crack formation in AA6451 samples under three-point bending using a multiscale electron microscopy-based approach. The results show that grain boundary ledges are formed prior to crack formation and their formation is influenced by the precipitate state. Additionally, constituent particles have no significant influence on damage nucleation processes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Jacob N. Vagott, Kathryn Bairley, Juanita Hidalgo, Carlo A. R. Perini, Andres-Felipe Castro-Mendez, Sarah Lombardo, Barry Lai, Lihua Zhang, Kim Kisslinger, Josh Kacher, Juan-Pablo Correa-Baena
Summary: Atomic layer deposition (ALD) allows precise control over the thickness, stoichiometry, and structural defects of materials. This study deposited lead iodide (PbI2) using a facile ALD process with readily accessible and low-cost precursors. The deposited PbI2 was characterized using various techniques and lays the foundation for further development of lead halide perovskite processes by ALD.
CHEMISTRY OF MATERIALS
(2022)
Article
Multidisciplinary Sciences
Michael Hoffmann, Zheng Wang, Nujhat Tasneem, Ahmad Zubair, Prasanna Venkatesan Ravindran, Mengkun Tian, Anthony Arthur Gaskell, Dina Triyoso, Steven Consiglio, Kandabara Tapily, Robert Clark, Jae Hur, Sai Surya Kiran Pentapati, Sung Kyu Lim, Milan Dopita, Shimeng Yu, Winston Chern, Josh Kacher, Sebastian E. Reyes-Lillo, Dimitri Antoniadis, Jayakanth Ravichandran, Stefan Slesazeck, Thomas Mikolajick, Asif Islam Khan
Summary: Crystalline materials with broken inversion symmetry can exhibit spontaneous electric polarization, which can transform a non-polar phase into a polar phase by the application of an electric field. The antiferroelectric transition in ZrO2 causes a negative capacitance, which has potential applications in electronics.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Jahnavi Desai Choundraj, Josh Kacher
Summary: This paper investigates the influence of local microstructure characteristics on the sensitization susceptibility of AA5456 alloy, and finds a correlation between geometrically necessary dislocation density and sensitized boundary rates. The results highlight the importance of considering factors beyond grain boundary characteristics in determining susceptibility to sensitization.
SCIENTIFIC REPORTS
(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
Sandra Stangebye, Changhui Lei, Aubri Kinghorn, Ian Robertson, Josh Kacher, Khalid Hattar
Summary: The dynamics of the gold-silicon eutectic reaction in limited dimensions were studied, revealing that the transformation process involves dislocation, grain boundary motion, and silicon diffusion, resulting in significant changes in the microstructure of the film.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Physics, Applied
K. D. Koube, T. Sloop, K. Lamb, J. Kacher, S. S. Babu, N. N. Thadhani
Summary: This study investigates spall failure and damage modes in Laser Powder Bed Fusion fabricated Stainless Steel 316L (SS316L) with intentional low-volume porosity. The results show that the suppression of spall failure is observed with increasing porosity, transitioning from spall-centered tensile stress dominated failure to a pore-centered microstructure-dominated damage mode involving void/crack nucleation and growth. The critical porosity level and spall location depend on both the volume fraction and the size of the initially fabricated pores. Heterogeneous deformation twinning, shear banding, grain rotation, and cracking are observed around pre-existing pores and expected spall failure sites.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
F. N. U. Md Moniruzzaman, Shawkat Imam Shakil, Sugrib Kumar Shaha, Josh Kacher, Ali Nasiri, Meysam Haghshenas, Amir Hadadzadeh
Summary: Direct aging heat treatment recipes were developed for additively manufactured (AM) PH13 -8Mo stainless steel by studying the kinetics of precipitation phase transformation. Different AM processes (arc-DED and L-PBF) resulted in different microstructures and properties. The direct aging treatments improved the strength and ductility of the materials by controlling the formation of bNiAl precipitates and preserving pre-existing dislocation networks.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Yang Su, Thanh Phan, Liming Xiong, Josh Kacher
Summary: This paper combines in situ high-resolution electron backscattered diffraction (EBSD) with concurrent atomistic-continuum (CAC) simulations to investigate the interactions between dislocation-mediated slip and grain boundaries (GBs) in Ni. The study shows that the local stress at slip-GB intersections initially increases with the pileup of dislocations and remains high, even after the nucleation of dislocations in the neighboring grain. The local stress only relaxes when the nucleated dislocations propagate away from the GB due to more incoming dislocations participating in the pileup. The relaxation of local stress is accompanied by the reconfiguration of atomic-scale GB structure, which not only affects subsequent dislocation transmission but also the configuration of dislocations away from the GB. These findings highlight the importance of incorporating local stress history in higher length scale models, such as crystal plasticity finite element.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Manufacturing
Collin Stiers, Katie Koube, Ethan Sinclair, Hyoungjun Sim, Elias Winterscheidt, Josh Kacher
Summary: A hydrogen reduction-based method for additive manufacturing of carbon steels from low cost and stable oxide powders is introduced. This method utilizes materials extrusion processes to extrude inks comprised of oxide powders, plastic binders, and solvents. The addition of carbon during the reduction process is demonstrated, resulting in through-thickness carburization of the final parts.
ADDITIVE MANUFACTURING LETTERS
(2023)
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)
