Article
Materials Science, Multidisciplinary
Vibhor Atreya, Jan Steven Van Dokkum, Cornelis Bos, Maria J. Santofimia
Summary: This study presents a novel methodology to quantify the transformation-induced strains in ferrite in dual-phase steel. The results show that neglecting the shear deformation associated with the martensitic transformation leads to significant underestimation in the prediction of transformation-induced strains in ferrite.
MATERIALS & DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Vibhor Atreya, Cornelis Bos, Maria J. Santofimia
Summary: This study identifies the characteristics of martensite that govern the extent of transformation-induced deformation in ferrite grains in DP steels. It was found that small austenite grains tend to transform into martensitic variants with a close-packed plane parallel relationship with adjacent ferrite grains, affecting the deformation of ferrite grains.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
J. T. Lloyd, D. J. Magagnosc, C. S. Meredith, K. R. Limmer, D. M. Field
Summary: The mechanical properties of transformation-induced plasticity (TRIP) steels are attractive in many applications, but they lose these properties under high dynamic loading rates. However, quasi-static pre-straining can significantly improve the dynamic strength of TRIP steels while retaining high work hardening response.
SCRIPTA MATERIALIA
(2022)
Article
Metallurgy & Metallurgical Engineering
Xin-Bo Ni, Zhuang-Zhuang Liu, Ke-Song Miao, Jin-Feng Leng, Guo-Hua Fan, Xin-Ying Teng, Hao Wu
Summary: A multilayered Ti-Al composite was fabricated and the orientation evolution and deformed substructure upon tension were characterized using in situ electron backscatter diffraction. A remarkably inhomogeneous deformation mode was observed within the interior of Ti grains, with the plastic flow becoming more difficult closer to the grain boundary or Ti/Al interfaces. This phenomenon is attributed to the synergetic constraint of phase interface and grain boundary. The present study thus provides a new strategy for tailoring the deformation behavior of metallic materials for performance optimization.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Chunfeng Du, Yipeng Gao, Yizhen Li, Min Zha, Peng Chen, Yunhe Sheng, Heng-Nan Liang, Hui-Yuan Wang
Summary: Crystalline defects such as dislocations, disclinations, and grain boundaries play a crucial role in determining the mechanical and functional properties of metallic materials. This study proposes a Lie-algebra-based method to quantify the rotational properties of disclinations and introduces a convenient way to determine disclination density distribution from Electron Backscatter Diffraction data. Through quasiin-situ Electron Backscatter Diffraction characterizations, three major formation mechanisms of disclinations have been identified in deformed polycrystalline Mg alloys, which can be treated as topological reactions among various types of defects. This work not only suggests a new mathematical tool to investigate the interactions and reactions among multiple types of crystalline defects but also provides a new insight to understand the deformation behaviors of metals and alloys based on dislocation/disclination theory.
Article
Materials Science, Multidisciplinary
C. Haug, D. Molodov, P. Gumbsch, C. Greiner
Summary: Tribological loading induces microstructural changes in metals through dislocation-mediated plastic deformation. Crystal lattice rotations play an important role in friction and wear at the sliding interface, and are influenced by sliding direction and grain orientation.
Article
Nanoscience & Nanotechnology
Christian Kurniawan, Chaoyi Zhu, Marc DeGraef
Summary: A new simulation-based pattern-matching method has been developed to retrieve the deformation tensor from electron backscatter diffraction patterns. The approach can infer the deformation state of the target pattern with an average absolute error of approximately 10(-8) for the distortion tensor under ideal conditions. It is robust against significant pattern rotation and can simultaneously optimize the pattern center with an average absolute distortion tensor error of around 10(-4) for noise-free patterns.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Xinyu Wu, Hongli Suo, Jiazhi Li, Yaotang Ji, Lin Ma, Min Liu, Yinming Dai, Jianhua Liu, Zili Zhang
Summary: The research investigated the microstructure and texture evolution of Ni-5 at%W alloy substrates during in situ tensile testing in different directions. Results showed that the tensile stress direction significantly influenced the texture evolution, with the cubic texture showing severe degradation at 45 degrees-RD.
MICROSCOPY AND MICROANALYSIS
(2021)
Article
Chemistry, Physical
Iztok Naglic, Blaz Leskovar, Zoran Samardzija, Bostjan Markoli
Summary: This study investigated the influence of gallium addition on the phases formed in Al-Mn alloys during casting, revealing that an increase in gallium content led to the formation of IQCs and DQCs in the alloys. Microanalysis showed that IQCs contained more gallium and less manganese compared to DQCs.
Article
Engineering, Civil
Daniel Wojtas, Lukasz Maj, Krzysztof Wierzbanowski, Anna Jarzebska, Robert Chulist, Jakub Kawalko, Klaudia Trembecka-Wojciga, Magdalena Bieda-Niemiec, Krzysztof Sztwiertnia
Summary: This study investigates the microstructure evolution of commercially pure titanium during hydrostatic extrusion using advanced techniques such as electron backscatter diffraction and transmission electron microscopy. The study reveals that hydrostatically extruded titanium exhibits an exceptionally inhomogeneous microstructure with discrepancies in grain size and shape, abundant dislocation-type features, and stored deformation energy. Grain subdivision and continuous dynamic recrystallization are identified as the main mechanisms governing microstructural development at different deformation levels.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Article
Chemistry, Physical
S. Mironov, S. Zherebtsov, S. L. Semiatin
Summary: Microstructure evolution during abc deformation of commercial-purity titanium were investigated, and it was found that continuous dynamic recrystallization played a dominant role in the microstructural changes. CDRX developed preferentially at the original grain boundaries, resulting in a necklace-type microstructure. Changes in strain path led to re-organization of the pre-existing dislocation structure and essential material softening. These findings are important for understanding and controlling the microstructure of titanium materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
S. Muralidharan, U. Mohammed Iqbal
Summary: This article proposes a new severe plastic technique called Multi-angular twist channel extrusion (MATE) for processing AA2024 aluminium alloy. The MATE method can impose a large strain in a single pass with better strain homogeneity and lower punch load. The study shows that an average effective strain of 2.78 was achieved with good strain homogeneity, and the tensile strength and hardness of the alloy were significantly increased. The MATE process also led to grain refinement, strain hardening, the development of a strong texture, and a high dislocation density in the extruded metal.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Min-Su Lee, Jeong-Rim Lee, Jong Bae Jeon, Jong Woo Won, Yong-Taek Hyun, Tea-Sung Jun
Summary: In this study, the tensile deformation behavior of CP-Ti plate was investigated in both the rolling and transverse directions using in-situ SEM-EBSD testing and stress-relaxation method. It was found that different slip systems were activated in the two directions, with prismatic slip dominant in the rolling direction and higher activity of non-prismatic slip systems in the transverse direction. Slip transfer was observed in the transverse direction, promoting multiple slips and dislocation interactions, while limited slip transfer indicated strong dislocation pinning at the grain boundaries in the rolling direction. The formation of grain boundary ledges and sinks was pronounced in the rolling and transverse directions, respectively, and they contributed to the anisotropy in the strain-hardening behavior of polycrystalline a-Ti.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
M. Wronski, K. Wierzbanowski, R. Malik, S. Wronski, D. Wojtas, A. Baczmanski, J. Tarasiuk
Summary: The study focused on the microstructure parameters of severely deformed 1050 aluminum after a 5-year recovery period at ambient temperature. It found significant changes in microstructure parameters and textures during this time, emphasizing the importance of these modifications for long-term use of mechanical parts produced by severe plastic deformation techniques.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Ehsan Norouzi, Reza Miresmaeili, Hamid Reza Shahverdi, Mohsen Askari-Paykani, Laura Maria Vergani
Summary: The study investigated the effect of plastic deformations on the hydrogen embrittlement of TRIP steel. In situ tensile tests revealed that the total elongation loss increased by 36.8% with increasing hydrogen current density. EBSD observation showed that hydrogen charging decreased stacking fault energy, leading to the formation of more a0-martensite. The formation of a0-martensite and increased dislocation density resulted in the reversible trap sites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Hyungsoo Lee, Min Chul Jo, Seok Su Sohn, Sang-Heon Kim, Taejin Song, Sung-Kyu Kim, Hyoung Seop Kim, Nack J. Kim, Sunghak Lee
MATERIALS CHARACTERIZATION
(2019)
Article
Nanoscience & Nanotechnology
Young Min Kim, Sung Kyu Kim, Nack J. Kim
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Nanoscience & Nanotechnology
Min Chul Jo, Jin Hyeok Choi, Hyungsoo Lee, A. Zargaran, Joo Hyun Ryu, Seok Su Sohn, Nack J. Kim, Sunghak Lee
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
Jin Hyeok Choi, Min Chul Jo, Hyungsoo Lee, Alireza Zargaran, Taejin Song, Seok Su Sohn, Nack J. Kim, Sunghak Lee
Article
Multidisciplinary Sciences
Y. H. Jo, W. M. Choi, D. G. Kim, A. Zargaran, S. S. Sohn, H. S. Kim, B. J. Lee, N. J. Kim, S. Lee
SCIENTIFIC REPORTS
(2019)
Article
Nanoscience & Nanotechnology
Gyeongbae Park, C. H. Nam, A. Zargaran, Nack J. Kim
SCRIPTA MATERIALIA
(2019)
Article
Materials Science, Multidisciplinary
Yunik Kwon, Ji Hyun Hwang, Hee Chae Choi, T. T. T. Trang, Byoungkoo Kim, A. Zargaran, Nack J. Kim
METALS AND MATERIALS INTERNATIONAL
(2020)
Article
Nanoscience & Nanotechnology
Jae H. Kim, Byeong-Chan Suh, T. T. T. Trang, Ji Hyun Hwang, Nack J. Kim
SCRIPTA MATERIALIA
(2019)
Article
Nanoscience & Nanotechnology
Yunik Kwon, A. Zargaran, Joo Hyun Ryu, Nack J. Kim
SCRIPTA MATERIALIA
(2019)
Article
Materials Science, Multidisciplinary
Min Chul Jo, Jisung Yoo, Min Cheol Jo, Alireza Zargaran, Seok Su Sohn, Nack J. Kim, Sunghak Lee
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
J. H. Hwang, T. T. T. Trang, O. Lee, Gyeongbae Park, A. Zargaran, Nack J. Kim
Article
Nanoscience & Nanotechnology
Min Chul Jo, Min Cheol Jo, Alireza Zargaran, Seok Su Sohn, Nack J. Kim, Sunghak Lee
Summary: Austenitic high-Mn steels exhibit a combination of twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) mechanisms, with partial recrystallization enhancing yield strength achieved by the precipitation of (V + Mo) complex carbides. Adding aluminum alloy can increase yield strength and achieve 1 GPa of yield strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Ji Hyun Hwang, A. Zargaran, Gyeongbae Park, O. Lee, B-J Lee, Nack J. Kim
Summary: The deformation behavior of a magnesium alloy containing 1% aluminum has been investigated in this study. The alloy shows much higher strength and larger elongation compared to pure magnesium with similar texture and grain size. Non-basal slips are easily activated in the Mg-1Al alloy at an early stage of deformation, leading to strain localization along the initially formed slip lines with increasing tensile strain.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
A. Zargaran, T. T. T. Trang, Gyeongbae Park, Nack J. Kim
Summary: Utilizing kappa-carbide nanoparticles to promote the formation and engineer the morphology of B2 phase, a novel precipitation hardened hot rolled lightweight steel with excellent combination of ultrahigh specific strength and ductility has been fabricated, leading to a significant enhancement in precipitation strengthening and work hardening capability.
Article
Materials Science, Multidisciplinary
Seung Mi Baek, Il Yong Choi, Ji Hyun Moon, Umarov Rakhmatjon, Jae H. Kim, Nack J. Kim, Jong Kyu Kim, Auezhan Amanov, Hyoung Seop Kim
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)
