Article
Nanoscience & Nanotechnology
M. A. Ritzo, R. A. Lebensohn, L. Capolungo, S. R. Agnew
Summary: This study explores the role of dislocation climb in mediating plasticity in a Mg alloy at moderately elevated temperatures. The results reveal that dislocation climb is important over a wide range of temperatures and strain rates, and provides an explanation for various observations.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Sowmya Daroju, Toshihiko Kuwabara, Rishabh Sharma, David T. Fullwood, Michael P. Miles, Marko Knezevic
Summary: The contribution of microstructural-level phenomena to reverse loading behavior in metal alloys is still an active and debated area of research. Accurate prediction of nonlinear effects, the Bauschinger effect, and changes in hardening rates during reverse loading is necessary for modeling deformation and springback in forming operations. This study applied a crystal plasticity model to predict and interpret reverse loading in two aluminum alloys, revealing the contribution of different microscale phenomena.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Yuanzhe Hu, Guowei Zhou, Xini Yuan, Dayong Li, Lingyong Cao, Wen Zhang, Peidong Wu
Summary: An artificial neural network-based (ANN) model is developed to predict thickness strain and corresponding surface roping in aluminum alloy. Combined with the crystal plasticity finite element model (CPFEM), an artificial orientation map generation algorithm is proposed to produce reliable datasets for training and validating the ANN model. The ANN-based model demonstrates good prediction capability and generality in multiple validation cases.
Article
Materials Science, Multidisciplinary
Tomas Manik, Knut Marthinsen, Kai Zhang, Arash Imani Aria, Bjorn Holmedal
Summary: In this study, the deformation textures of AA6063 and AA6082 aluminum alloys during flat profile extrusion were analyzed using numerical modeling. The results showed variations in texture behavior at different temperatures, with the Alamel model performing the best in predicting the textures.
FRONTIERS IN MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Taejoon Park, Hojun Lim, Benjamin Reedlunn, Sharlotte Kramer, Edmundo Corona, Farhang Pourboghrat
Summary: Crystal plasticity finite element models typically assume uniform dislocation distribution within grains, but this study found that considering the initial nonuniformity of dislocations led to more accurate predictions in simulations comparing to experiments.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Vignesh Vivekanandan, Peng Lin, Grethe Winther, Anter El-Azab
Summary: The continuum dislocation dynamics framework aims to capture the evolution of dislocation density and deformation of crystals under mechanical loading by solving transport equations for dislocations concurrently with crystal mechanics equations, incorporating dislocation reactions to improve predictability. The proposed formulation, which includes virtual dislocations to enforce dislocation line continuity, enables accurate enforcement of divergence free condition in numerical solutions, leading to highly accurate results in comparison with previous approaches.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Yanbo Pei, Yonggang Hao, Jie Zhao, Jiantong Yang, Bugang Teng
Summary: This study investigates the hydro-bulging process of 2219 aluminum alloy sheet using cross-scale numerical modeling, combining the macroscopic finite element method (FEM) and crystal plasticity finite element method (CPFEM). The calculated texture evolution shows good agreement with experimental results, and the stress error between the two scales is generally small. The effects of different strain states on texture evolution and slip mode are further discussed.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Qian Yin, Zhixun Wen, Jundong Wang, Yeda Lian, Guangxian Lu, Chengjiang Zhang, Zhufeng Yue
Summary: This study focuses on the stress and strain responses of a second-generation nickel-based superalloy at different temperatures and orientations. Microstructure and dislocation arrangements were observed to analyze the fracture failure modes and dislocation morphologies. A new hardening model and damage evolution law were proposed and successfully fitted the stress-strain response for different conditions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Xi Luo, Michael Zaiser
Summary: Continuum dislocation dynamics (CDD) describes the evolution of curved and connected dislocation lines using density-like field variables, including the volume density of loops as an additional field. The curvature field evolution equation contains numerically inconvenient higher-order derivatives of the density fields, as dislocation curvature represents a spatial derivative of the discrete dislocation density tensor. We propose a simple approximation to express curvature in terms of density fields and demonstrate its application to a benchmark problem in Mg polycrystal deformation.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Yuhong Lin, Xiaohui Cui, Kanghua Chen, Ang Xiao, Ziqin Yan
Summary: The effect of electromagnetic forming (EMF) on the forming limit and properties of 2024-O aluminum alloy was studied. The results showed that EMF can increase the forming limit and improve the uniformity of thickness thinning compared to conventional stamping. Additionally, EMF can refine the grain size, increase the proportion of small-angle grains, and promote a more uniform distribution of dislocations.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Yannick Hollenweger, Dennis M. Kochmann
Summary: The deformation mode of pure magnesium transitions from compressive twin bands to pyramidal II slip with increasing temperature, suggesting that the temperature dependence is primarily governed by non-basal slip.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Balduin Katzer, Kolja Zoller, Daniel Weygand, Katrin Schulz
Summary: Plastic deformation of metals involves the formation and evolution of complex dislocation networks, which are crucial for the development of crystal plasticity models. This study demonstrates the transfer of knowledge from discrete dislocation dynamics simulations to continuum-based models through a physically based dislocation network evolution theory. The results show that the evolution of dislocation networks is influenced by crystal orientation and the activity of slip systems.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Mechanics
Elisa Cantergiani, Georg Falkinger, Franz Roters
Summary: This study investigates the orientation evolution and in-grain microtexture of Cube-oriented FCC crystals in aluminium using crystal plasticity simulations. The results highlight the strong influence of neighboring grains on Cube fragmentation and the different mechanisms during hot-rolling and cold-rolling processes.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Physics, Multidisciplinary
Hao Xiang, Rui Wang, Feng-Lin Deng, Shao-Feng Wang
Summary: This study comprehensively investigates the core structure and properties of 90 degrees and 60 degrees dislocations in metal aluminum, revealing their differences under thermal conditions and minimal temperature influence on the core structures.
Article
Computer Science, Artificial Intelligence
Johannes Dornheim, Lukas Morand, Samuel Zeitvogel, Tarek Iraki, Norbert Link, Dirk Helm
Summary: This study introduces a deep reinforcement learning approach for optimizing processing paths in material design, aiming to find optimal paths to reach target structures with desired properties. The algorithm can identify and optimize processing paths to reach single or multiple target structures effectively and efficiently.
JOURNAL OF INTELLIGENT MANUFACTURING
(2022)
Article
Construction & Building Technology
Mohsen Mohammadi, Ali Akbar Shirzadi Javid, Mehdi Divandari
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2018)
Article
Engineering, Industrial
Parisa Fathi, Mohsen Mohammadi, Xili Duan, Ali M. Nasiri
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2018)
Article
Materials Science, Multidisciplinary
Hamed Asgari, Akindele Odeshi, Keyvan Hosseinkhani, Mohsen Mohammadi
Article
Materials Science, Multidisciplinary
E. Cyr, H. Asgari, S. Shamsdini, M. Purdy, K. Hosseinkhani, M. Mohammadi
Article
Nanoscience & Nanotechnology
Amir Hadadzadeh, Babak Shalchi Amirkhiz, Jian Li, Akindele Odeshi, Mohsen Mohammadi
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Materials Science, Multidisciplinary
Nathaniel Despres, Edward Cyr, Mohsen Mohammadi
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2019)
Article
Nanoscience & Nanotechnology
Amir Hadadzadeh, Babak Shalchi Amirkhiz, Mohsen Mohammadi
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
P. Fathi, M. Mohammadi, X. Duan, A. M. Nasiri
Article
Engineering, Manufacturing
Amir Hadadzadeh, Babak Shalchi Amirkhiz, Akindele Odeshi, Jian Li, Mohsen Mohammadi
ADDITIVE MANUFACTURING
(2019)
Article
Engineering, Manufacturing
Mehran Rafieazad, Mohsen Mohammadi, Ali M. Nasiri
ADDITIVE MANUFACTURING
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
Hossein Azizi, Nikolas Provatas, Mohsen Mohammadi
TMS 2019 148TH ANNUAL MEETING & EXHIBITION SUPPLEMENTAL PROCEEDINGS
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
Chalasani Dharmendra, Amir Hadadzadeh, Babak Shalchi Amirkhiz, Mohsen Mohammadi
TMS 2019 148TH ANNUAL MEETING & EXHIBITION SUPPLEMENTAL PROCEEDINGS
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
Amir Hadadzadeh, Babak Shalchi Amirkhiz, Brian Langelier, Jian Li, Mohsen Mohammadi
TMS 2019 148TH ANNUAL MEETING & EXHIBITION SUPPLEMENTAL PROCEEDINGS
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
Amir Hadadzadeh, Babak Shalchi Amirkhiz, Jian Li, Mohsen Mohammadi
TMS 2019 148TH ANNUAL MEETING & EXHIBITION SUPPLEMENTAL PROCEEDINGS
(2019)
Article
Engineering, Manufacturing
Mohsen Mohammadi, Hamed Asgari
ADDITIVE MANUFACTURING
(2018)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)