Article
Materials Science, Multidisciplinary
Ivan Gutierrez-Urrutia
Summary: The ECC of stacking faults in [101] single-crystal 316L fcc stainless steel has been evaluated, showing strong dependence on the deviation parameter. This effect influences fault imaging and g.R analysis. The interplay between the stacking fault nature and epsilon-martensite is analyzed through g.R analysis.
MICROSCOPY AND MICROANALYSIS
(2021)
Article
Nanoscience & Nanotechnology
Ming Chen, Wenlong Deng, MengMeng Wang, Jiansheng Li, Shilong Xing
Summary: Duplex stainless steels with ultrafine or fine-grained microstructures exhibit pronounced discontinuous yielding and Luders banding behavior during tensile deformation at 77 K. In particular, samples with high-stability eye-shaped structures and ultrafine grains show a yield strength of 1750 MPa, a yield drop of 87 MPa, and a Luders strain of 0.23.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Raz Samira, Adam Cohen, Fernando Patolsky, Noa Lachman
Summary: In this study, the long-term durability of thick multi-walled carbon nanotubes (MWCNTs) under cyclic loading was assessed using in situ transmission electron microscope (TEM) observations. The tube's structural resilience was demonstrated after 68 loading-unloading cycles, and the stiffness of the tube was calculated to be in a range of 0.15 to 0.28 TPa, comparable to literature values. These in situ tests provide valuable insights into the fatigue resistance of CNTs and can guide the design of CNT-based devices for specific applications.
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
Nanoscience & Nanotechnology
Sangmin Lee, Yong-Deok Im, Ryo Matsumoto, Hiroshi Utsunomiya
Summary: C-HSR rolling can improve the balance of mechanical properties and electrical conductivity of Cu x Al alloy by increasing dislocation density and reducing grain size.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Kai Zhang, Jing-Hua Zheng, Christopher Hopper, Chaoyang Sun, Jun Jiang
Summary: The study shows that the mechanical properties of magnesium alloy (WE43) can be significantly improved at cryogenic temperatures, especially when the compression direction is perpendicular to the extrusion direction. This improvement is attributed to enhanced pyramidal slip.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Analytical
Wengang Du, Jing Chai, Dingding Zhang, Yibo Ouyang, Yongliang Liu
Summary: The monitoring of mine pressure, division of vertical zoning of the overburden, discrimination of key stratum structure of the overburden and monitoring of advanced abutment pressure are still the main research problems in the field of coal mining. Therefore, the promotion of development of a monitoring technology of mining-induced rock mass deformation has important research value in the mining field. In this study, a quantitative index of coupling action between the mining rock mass and optical fiber is put forward, and the coupling coefficient of different vertical zonings is quantitatively analyzed and discussed.
Article
Engineering, Geological
Jiangfeng Liu, Shijia Ma, Hongyang Ni, Hai Pu, Xiaozhao Li, Shaojie Chen
Summary: The pore structure of bentonite was characterized using scanning electron microscopy (SEM) and focused ion beam-SEM (FIB-SEM), and the effects of different algorithms on pore structure characterization were evaluated. Permeability calculations and experiments were conducted to investigate the importance of pore structures in determining the seepage characteristics of bentonite.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Remi Delville, Marc Verwerft
Summary: Electron microscopy maps were used to investigate grain structure (by EBSD), porosity (by BSE), and elemental distributions (by EPMA) in a mixed-oxide nuclear ceramic. These maps were programmatically correlated and integrated into a multi-dimensional dataset, allowing the assessment of the interdependence of key microstructural properties. The method demonstrated its effectiveness through the extraction of statistically representative correlations between grain size, elemental enrichment, and intra-granular porosity related to solid-state processes. The fusion of data from different acquisitions produced novel insights into crystallographic, microstructural, and chemical features.
MICROSCOPY AND MICROANALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Di Wan, Shuai Guan, Dong Wang, Xu Lu, Jun Ma
Summary: In this study, the preparation and hydrogen embrittlement of an aluminum-based CrFeNi2.1 high-entropy alloy were intensively investigated, and it was found that cracking along phase boundaries and grain boundaries is the main cause of hydrogen-assisted fracture.
Article
Materials Science, Multidisciplinary
Lihua Li, Shuang Liu, Meng Zhou, Yi Zhang, Shengli Liang, Jinliang Huang, Baohong Tian, Yongfeng Geng, Yijie Ban, Yong Liu, Yanlin Jia, Xu Li, Alex A. Volinsky
Summary: This study investigates the effect of graphene on the thermal deformation of Cu/CeO2/Cr and GO-Cu/CeO2/Cr composites. Experimental results and microstructure analysis reveal that graphene contributes to dispersion strengthening, twin strengthening, and grain refinement during thermal deformation, while inhibiting dynamic recrystallization. Additionally, increasing the deformation temperature strengthens the texture orientation, resulting in GO-Cu/CeO2/Cr composites with remarkable dynamic recovery characteristics and high-temperature properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
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
Materials Science, Multidisciplinary
Monika Bugajska, Anna Sypien, Piotr Bobrowski, Anna Korneva, Jerzy Morgiel, Zygmunt Szulc, Joanna Wojewoda-Budka
Summary: This study presented the microstructure of a newly developed Nb/Inconel 601 weld by utilizing SEM and TEM techniques, focusing on the continuity and morphology of the interface, as well as the microstructural changes nearby. The EBSD technique was used to examine grain size, orientation, and boundaries, while chemical composition determination was carried out using EDS in SEM. Observations of the mixed region at the Nb/Inconel 601 interface using TEM revealed its chemical and phase composition.
MICROSCOPY AND MICROANALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Jingqing Zhang, Yong Shang, Yali Dong, Yanling Pei, Shusuo Li, Shengkai Gong
Summary: The crack initiation and strengthening mechanism of the FGH96 solid-state diffusion bonding joint were investigated at different temperatures. It was found that carbides, twin boundaries, and grain orientation played a critical role in crack initiations. At room temperature, cracks initiated at the carbide/matrix interface and also developed along newly formed grain boundaries. At high temperature, cracks mainly originated along high-angle grain boundaries and resulted in intergranular fracture.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Edouard Chauvet, Paraskevas Kontis, Eric A. Jaegle, Baptiste Gault, Dierk Raabe, Catherine Tassin, Jean-Jacques Blandin, Remy Dendievel, Benjamin Vayre, Stephane Abed, Guilhem Martin
Article
Materials Science, Multidisciplinary
P. Pandey, S. K. Makineni, A. Samanta, A. Sharma, S. M. Das, B. Nithin, C. Srivastava, A. K. Singh, D. Raabe, B. Gault, K. Chattopadhyay
Article
Materials Science, Multidisciplinary
Jing Su, Dierk Raabe, Zhiming Li
Article
Chemistry, Multidisciplinary
Seok Su Sohn, Alisson Kwiatkowski da Silva, Yuji Ikeda, Fritz Koermann, Wenjun Lu, Won Seok Choi, Baptiste Gault, Dirk Ponge, Joerg Neugebauer, Dierk Raabe
ADVANCED MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
I. R. Souza Filho, M. J. R. Sandim, R. Cohen, L. C. C. M. Nagamine, H. R. Z. Sandim, D. Raabe
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Xin Ji, Ivan Gutierrez-Urrutia, Satoshi Emura, Tianwei Liu, Toru Nara, Xiaohua Min, Dehai Ping, Koichi Tsuchiya
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2019)
Article
Microscopy
Ivan Gutierrez-Urrutia
Article
Engineering, Mechanical
Eralp Demir, Ivan Gutierrez-Urrutia
Summary: This study investigates the deformation behavior of aluminum grains using grain boundary mechanics, exploring the origins and influencing factors of grain boundary strengthening mechanisms through experimental and numerical analysis. Results show the presence of strain gradient hardening near grain boundaries, with the non-local strain gradient based strain hardening law successfully capturing this effect.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Review
Metallurgy & Metallurgical Engineering
Ivan Gutierrez-Urrutia
Summary: This review introduces the structural phases, microstructural characteristics, and properties of low density Fe-Mn-Al-C steels, highlighting their potential applications in lightweight car body structures and cryogenic industry. It also discusses the latest alloy design strategies and future challenges for establishing these steels as structural materials for industrial applications.
ISIJ INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Ivan Gutierrez-Urrutia
Summary: The ECC of stacking faults in [101] single-crystal 316L fcc stainless steel has been evaluated, showing strong dependence on the deviation parameter. This effect influences fault imaging and g.R analysis. The interplay between the stacking fault nature and epsilon-martensite is analyzed through g.R analysis.
MICROSCOPY AND MICROANALYSIS
(2021)
Article
Nanoscience & Nanotechnology
Akinobu Shibata, Ivan Gutierrez-Urrutia, Kazuho Okada, Goro Miyamoto, Yazid Madi, Jacques Besson, Kaneaki Tsuzaki
Summary: The study investigated the relationship between the mechanical response and microscopic crack propagation behavior of hydrogen-related intergranular fractures in high-strength martensitic steel. The results showed that hydrogen can affect crack tip morphology and induce strain localization in the vicinity of intergranular cracks.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Akinobu Shibata, Ivan Gutierrez-Urrutia, Akiko Nakamura, Goro Miyamoto, Yazid Madi, Jacques Besson, Toru Hara, Kaneaki Tsuzaki
Summary: The present study investigated the local arrestability of intergranular crack in high-strength martensitic steel through multi-scale three-dimensional (3D) analysis. It was found that the crack propagation was locally arrested by low-angle grain boundary plane segments and grain boundary triple junctions surrounded by large martensite variants. Increasing the fraction of low-angle grain boundary plane segments and large martensite variants near grain boundaries can enhance the local crack-arrestability of high-strength martensitic steels.
Article
Materials Science, Multidisciplinary
I. Gutierrez-Urrutia, A. Shibata, K. Tsuzaki
Summary: In this study, the microstructural characteristics of the microband structure in low-density steel deformed at low temperatures were investigated. The nucleation mechanisms and grain-orientation dependence of the microband structure were analyzed, providing insight into the deformation behavior of the steel at cryogenic temperatures.
Article
Materials Science, Multidisciplinary
Akinobu Shibata, Goro Miyamoto, Shigekazu Morito, Akiko Nakamura, Taku Moronaga, Houichi Kitano, Ivan Gutierrez-Urrutia, Toru Hara, Kaneaki Tsuzaki
Summary: In this study, the substructures and crystallographic features of as-quenched lath martensite in interstitial-free (IF) steel and low-carbon steel (0.2C steel) were analyzed using advanced microscopy techniques. The study revealed differences in the morphology and habit plane orientation between the two types of steel. Dislocation structures, cementite formation, and carbon segregations were observed, indicating significant changes in the substructure during quenching. Based on the experimental results, the researchers discussed the origin of the substructures and crystallographic features of lath martensite.
Article
Chemistry, Physical
Akinobu Shibata, Ivan Gutierrez-Urrutia, Akiko Nakamura, Kazuho Okada, Goro Miyamoto, Yazid Madi, Jacques Besson, Toru Hara, Kaneaki Tsuzaki
Summary: This study investigated the three-dimensional propagation behavior of hydrogen-related intergranular cracks in martensitic steel. X-ray computed tomography revealed that cracks in hydrogen-charged specimens were more continuous. Furthermore, crack-tip blunting and ductile rupture of un-cracked ligaments were associated with specific prior austenite grain boundary (PAGB) segments in the uncharged specimen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)