Article
Nanoscience & Nanotechnology
Chengshuang Zhou, Dan Tang, Kaiyu Zhang, Fangyue Wu, Ping Lin, Yan Jin, Lin Zhang, Jinyang Zheng
Summary: The hydrogen embrittlement behavior of two stabilized austenitic TWIP steels under high-pressure thermal hydrogen charging and hydrogen environment were investigated. It was found that both TWIP steels showed a certain susceptibility to hydrogen embrittlement after hydrogen charging, with the TWIP steel with higher Mn content showing weaker hydrogen embrittlement.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Chengshuang Zhou, Bei Fang, Jing Wang, Dan Tang, Huimin Tao, Yanming He, Zhengrong Zhou, Changfeng Chen, Lin Zhang
Summary: The behavior of as-received and cold-rolled Fe-25Mn-10Ni-0.65C twinning-induced plasticity steel in hydrogen environment was studied using fatigue crack growth rate tests. It was found that TWIP steel exhibits weak hydrogen embrittlement susceptibility due to the formation of deformation twins at the crack tip. Cold rolling was shown to significantly improve the hydrogen embrittlement resistance and fatigue resistance of TWIP steel.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Multidisciplinary
Kaushal Kishore, Pankaj Kumar, Goutam Mukhopadhyay
Summary: This study investigates the impact of spot-welding current on the load-bearing capacity and fracture mechanism of galvannealed dual-phase steel joints. Increasing the welding current leads to a significant increase in the load-bearing capacity of the joints. Quantitative fractography demonstrates a shift in fracture mechanism and the proportion of dimples at different welding currents. The relationship between microstructure and hardness in different welding zones is analyzed using advanced microscopy techniques. Fatigue tests reveal endurance at 10% of the maximum load-bearing capacity. The study also examines the initiation of cracks and the possibility of liquid metal embrittlement cracks.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Matias Bordone, Juan Perez-Ipina, Raul Bolmaro, Alfredo Artigas, Alberto Monsalve
Summary: This article focuses on the mechanical behavior and microstructural changes observed in two high-manganese steels with different carbon contents, impacting the TWIP and TRIP effects. Tensile tests revealed distinct fracture micro-mechanisms in the two steels.
Article
Nanoscience & Nanotechnology
Dongdong Li, Lihe Qian, Chaozhang Wei, Shuai Liu, Fucheng Zhang, Jiangying Meng
Summary: The tensile properties, evolution of dislocation density, and twinning behavior of Fe-18Mn-1.0C and Fe-18Mn-0.6C twinning-induced plasticity steels were systematically investigated. Increasing the cold rolling reduction led to an obvious increase in yield strength and tensile strength, as well as a decrease in elongation to fracture. The dislocation density and amount of deformation twins increased with increasing rolling reduction and tensile strain. The contributions of lattice friction stress, dislocations, twins, and dynamic strain ageing to flow stress were analyzed, with dislocation strengthening and twin boundaries strengthening found to play a dominant role.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Cheng Zhang, Huihui Zhi, Stoichko Antonov, Jun He, Hang Yu, Zihui Guo, Yanjing Su
Summary: The effect of deformation twins on the hydrogen embrittlement of TWIP steel was investigated, and the results showed that specimens with high twin volume fraction exhibited better resistance to hydrogen embrittlement.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Wang Cai, Chaoyang Sun, Chunhui Wang, Lingyun Qian, Yuemin Li, M. W. Fu
Summary: This research investigated the deformation mechanisms and fracture characteristics of TWIP steels at high temperature. It revealed the influence of GB angle, grain size, and microvoids on the initiation and propagation of microcracks along grain boundaries.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Nanoscience & Nanotechnology
Wufeng Dong, Hua Pan, Ming Lei, Kai Ding, Yulai Gao
Summary: The relationship between liquid metal embrittlement (LME) defect and Fe-Zn intermetallic compounds (IMCs) in galvanized high-strength steels during resistance spot welding was systematically investigated. The results showed that LME cracks mainly occurred in the center and shoulders of the weld, and the brittle Fe-Zn IMCs played a critical role in initiating and promoting the formation of LME cracks.
SCRIPTA MATERIALIA
(2022)
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
Materials Science, Multidisciplinary
Lin Chen, Stoichko Antonov, Keke Song, Huihui Zhi, Wenyao Li, Yong Chen, Kuanhui Hu, Yong Zhong, Yanjing Su, Lijie Qiao
Summary: This study investigated the effect of solution atoms on the hydrogen embrittlement resistance of TWIP steels, finding that Fe-30Mn-3Al3Si steel showed better resistance compared to Fe-30Mn-0.6C steel. Additionally, the crack mode of Fe-30Mn-3Al3Si steel was a combination of transgranular and intergranular cracks, while transgranular cracks were rarely found in Fe-30Mn-0.6C steel.
Article
Materials Science, Multidisciplinary
Hyung-Jun Cho, Yeonggeun Cho, Hojun Gwon, Sunghak Lee, Seok Su Sohn, Sung-Joon Kim
Summary: The effects of Ni/Cu replacement and subsequent aging treatment on the tensile and hydrogen embrittlement properties of Fe-Cr-Ni austenitic stainless steels were investigated. The results showed that the replacement enhanced tensile strength and ductility in the aged state, but reduced these properties in the as-annealed state. The formation of Cu-rich precipitates effectively interfered with hydrogen diffusion and increased the resistance to hydrogen embrittlement. However, excessive formation of Cu-rich precipitates destabilized the austenite phase and induced martensitic transformation, leading to earlier brittle fracture and severe hydrogen embrittlement.
Article
Materials Science, Multidisciplinary
Keke Yang, Gerson Meschut, Georg Seitz, Max Biegler, Michael Rethmeier
Summary: In resistance spot welding of zinc-coated AHSS in automotive manufacturing, severe cracks are observed at the sheet edge under reduced flange widths. Through combined numerical and experimental investigations, these cracks are identified as a new type of LME crack caused by unique geometric conditions that amplify radial material flow and result in tangential tensile stresses exceeding the yield strength under heightened temperature conditions, combined with liquid zinc.
Article
Nanoscience & Nanotechnology
Hyung-Jun Cho, Yeonggeun Cho, Gang Hee Gu, Hyoung Seop Kim, Sunghak Lee, Sung-Joon Kim
Summary: The effects of Cu as an element on the deformation mechanisms and tensile ductility of austenitic stainless steels (ASSs) were investigated by varying the tensile strain rate. The study found that Cu and strain rate have different effects on the elongation, and there is a competition between two mechanisms.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yunwu Ma, Yang Yu, Peihao Geng, Ryohei Ihara, Kyohei Maeda, Reiichi Suzuki, Tetsuo Suga, Ninshu Ma
Summary: This study investigates the fracture initiation and propagation behavior of welds with different pre-crack characteristics. External pre-cracks accelerate damage accumulation, while internal pre-cracks have a more detrimental influence on weld performance. The negative effects of LME cracks on weld performance can be mitigated by controlling the crack location and geometry.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Nima Nadimi, Mohammad Pouranvari, Reza Ansari, Majid Pouranvari
Summary: The fusion zone (FZ) hardness of resistance spot welds significantly impacts the performance and durability of the welds. The FZ in automotive steels is primarily composed of martensitic microstructure. The FZ hardness tends to increase in a specific order, from interstitial-free (IF) steels to quench & partitioning (Q&P) steels. Regression-based models that consider martensite strengthening mechanisms provide the most accurate estimation of FZ hardness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Industrial
Sangun Ha, Siva Prasad Murugan, Karuppasamy Pandian Marimuthu, Yeongdo Park, Hyungyil Lee
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Dileep Chandran Ramachandran, Siva Prasad Murugan, Young-Min Kim, Dongcheol Kim, Gwang-Gook Kim, Dae-Geun Nam, Chanyoung Jeong, Yeong Do Park
METALS AND MATERIALS INTERNATIONAL
(2020)
Article
Metallurgy & Metallurgical Engineering
Siva Prasad Murugan, Kaisar Mahmud, Changwook Ji, Ilguk Jo, Yeong-Do Park
WELDING IN THE WORLD
(2019)
Article
Materials Science, Multidisciplinary
Jae Won Kim, S. P. Murugan, Ji-Hong Yoo, R. Ashiri, Yeong-Do Park
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
(2020)
Article
Materials Science, Coatings & Films
Md Abdul Karim, Jin-Hee Bae, Dong-Hyuck Kam, Cheolhee Kim, Won-Ho Choi, Yeong-Do Park
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Materials Science, Coatings & Films
Siva Prasad Murugan, Junsu Kim, Jiung Kim, Yook Wan, Changyong Lee, Jong Jeon, Yeong-Do Park
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Metallurgy & Metallurgical Engineering
Siva Prasad Murugan, Jong Bae Jeon, Changwook Ji, Yeong-Do Park
WELDING IN THE WORLD
(2020)
Article
Engineering, Manufacturing
Md Abdul Karim, Taek-Eon Jeong, Wooram Noh, Keun-Young Park, Dong-Hyuck Kam, Cheolhee Kim, Dae-Geun Nam, Hudson Jung, Yeong-Do Park
JOURNAL OF MANUFACTURING PROCESSES
(2020)
Article
Materials Science, Multidisciplinary
Parsa Pishva, Sajad Salimi Beni, Masoud Atapour, Mohammad Reza Salmani, Rouholah Ashiri
Summary: The research revealed that the corrosion resistance of the welds obtained by the steel is lower than that of the base metal of IF steel, and the corrosion resistance of the base metal of IF steel is higher than that of the welds in both solutions.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Hossein Karampour, Mohammad Ahmadi Parsa, Ali Heidary Moghadam, Bahram Pourhasan, Rouholah Ashiri
Summary: The development of a new method for the preparation of high-purity nanocrystalline hydroxyapatite at room temperature, with subsequent optimization for cost-effectiveness, was a significant achievement in this study.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Jae-Deuk Kim, Siva Prasad Murugan, Seong-Woo Choi, Yutaka S. Sato, Jae-Keun Hong, Changwook Ji, Chang-Sub Kwak, Yeong-Do Park
Summary: The mechanical properties of commercially pure titanium can be improved through grain refinement, but welding fine-grained materials is challenging due to grain coarsening. Friction stir welding is a promising process, and this research focuses on friction stir welding of fine-grained and ultra-fine-grained commercially pure titanium. The microstructural features of the base metals play a significant role in the microstructural evolution of the stir zone during the welding process.
Article
Engineering, Industrial
Arun Lalachan, Siva Prasad Murugan, Woo-Sung Jin, Yeong-Do Park
Summary: This study combines in-situ observation, ex-situ verification, and finite element modeling to identify the critical stages of liquid metal embrittlement (LME) cracking in resistance spot welds (RSW) of Zn-coated steel. It was found that large LME cracks form only after a critical welding time of 250 ms when the growth of the weld nugget exceeds that of the electrode-sheet contact and electrode tip-face diameter. The study proposes a mechanistic model explaining the effect of nugget growth rate and electrode-contact growth on thermal gradient, stress development, and LME cracking.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Dileep Chandran Ramachandran, Sung-Dae Kim, Joonoh Moon, Chang-Hoon Lee, Jun-Ho Chung, Elliot Biro, Yeong-Do Park
Article
Materials Science, Multidisciplinary
A. Khalili, M. Mojtahedi, M. Goodarzi, M. J. Torkamany
IRANIAN JOURNAL OF MATERIALS SCIENCE AND ENGINEERING
(2019)
Article
Materials Science, Multidisciplinary
L. Hajiannia, M. Shamanian, M. Atapour, R. Ashiri, E. Ghassemali
IRANIAN JOURNAL OF MATERIALS SCIENCE AND ENGINEERING
(2019)
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)
