Article
Materials Science, Multidisciplinary
H. Sadeghi, A. R. Geranmayeh
Summary: Increasing Bi content improves the creep resistance of AZ61-0.7Si-xBi cast magnesium alloys, mainly due to the higher volume fraction of thermally stable Mg3Bi2 intermetallic particles.
MATERIALS SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Civil
Jianlong Zhang, Chunguo Zhang, Shengyong Mu, Shuai Wang, Hongchang Li
Summary: In this study, a method combining continuous indentation test and numerical simulation was established to accurately acquire the mechanical properties of nickel-based alloy 600 before and after creep. The high stress creep constitutive equation of alloy 600 in autoclave environment was obtained, and the influencing factors of mechanical properties were analyzed. The results showed that the mechanical properties of nickel-based alloy 600 increased with the increase of creep time, and the indentation test model verified by numerical simulation provided a nondestructive way to obtain the mechanical property parameters.
Article
Materials Science, Multidisciplinary
A. Allami, A. R. Geranmayeh, R. Mahmudi
Summary: The addition of 0.2 wt% Sc to the AZ91 magnesium alloy resulted in a decrease in creep rates at all stress levels and temperatures. This was attributed to the formation of thermally stable Al3Sc and Mg5Al4Sc particles, reduction in the quantity of the unstable b-Mg17Al12 phase, and solid solution strengthening of Al in the Mg matrix.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Nooruddin Ansari, Dong-Hyun Lee, E-Wen Huang, Jayant Jain, Soo Yeol Lee
Summary: The present study investigates the anisotropic microstructure, nanomechanical, and corrosion behavior of direct energy deposited Ti-13Nb-13Zr biomedical alloys. The study reveals different mechanical behaviors in different planes, with the xy plane showing better indentation hardness and lower strain rate sensitivity compared to the x-z plane. The microstructure of the xy plane is finer, leading to better strength and corrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Yunsheng Wu, Xiangxiang Zhang, Changshuai Wang, Xuezhi Qin, Jieshan Hou, Lanzhang Zhou
Summary: The creep deformation behavior and microstructure evolution of the Ni-Fe-based GH984G alloy were investigated. The interaction between dislocation and gamma' precipitates is the main reason for the higher creep activation energy than lattice self-diffusion. Dislocation climbing is the primary creep mechanism below 800℃, while dislocation climbing and partial dislocation shearing into gamma' dominate above 800℃. Additionally, microstructural degradation also contributes to creep damage.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Mohammad Varmazyar, Shahrouz Yousefzadeh, Sheikhi Mohammad Morad
Summary: The effect of different Ni additions on the impression creep behavior of cast A356 alloy was studied, and it was found that the addition of Ni can improve the creep properties of the alloy. This improvement is mainly attributed to the modification of eutectic silicon and the formation of Ni-rich intermetallics.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Bo Jiang, Dongdong Zhang, Hong Xu, Yongbing Liu, Zhanyi Cao, Xiaohong Yang
Summary: Through electropulsing current-assisted tension, the ductility of an extruded AZ61 magnesium alloy tube was significantly improved, accompanied by the emergence of serrated flow phenomenon. Electropulsing also reduced the tendency of twinning in the alloy, although twinning fraction may depend on the electropulsing frequency.
Article
Nanoscience & Nanotechnology
Yaocheng Zhang, Zheng Liu, Song Pang, Tao Meng, Yating Zhi, Yuling Xu, Lv Xiao, Ruifeng Li
Summary: The study evaluated the tensile creep behavior of GW83 alloy under different temperature and stress conditions, showing that increasing temperature and stress significantly affect the creep performance. T6 treatment can greatly improve the creep resistance of the alloy, and the tensile creep plastic deformation is mainly controlled by the applied stress.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Hui Shi, Yuanding Huang, Lixiang Yang, Chunquan Liu, Hajo Dieringa, Chong Lu, Lv Xiao, Regine Willumeit-Roemer, Norbert Hort
Summary: This study investigates the compressive creep behavior of Mg-12Gd-0.4Zr alloys at 250 degrees C. The presence of beta' and beta'(F) precipitate chains in Mg-Gd-Zr alloys forms a honeycomb-like structure, improving the creep resistance. However, the creep performance of the sand-cast alloy is weakened by the occurrence of weakly strengthening beta(1) precipitates. On the other hand, the creep resistance of the peak-aged alloy is enhanced by the formation of precipitate-free zones and the arrested cross-slip of basal and pyramidal dislocations.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Kumar Sourabh, J. B. Singh
Summary: The creep behavior of Ni-base superalloy 690 was studied under constant load creep conditions at temperatures ranging from 800 to 1000 ℃ and stresses ranging from 25 to 105 MPa. The alloy exhibited power-law creep behavior and followed the Monkman-Grant relationship. The majority of creep data points fell within a +/- 5% scatter band on the Larson Miller parameter vs. log stress plot. The alloy underwent more than 50% of its life in the tertiary creep regime and predominantly failed due to cavitation. The apparent activation energy and stress exponent of creep were relatively high.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Electrical & Electronic
Tian Zhong, Feng Guo, Shiyun Lei, Biao Xiao, Qingduan Li, Tao Jia, Xunchang Wang, Renqiang Yang
Summary: This study systematically evaluates the multi-scale mechanical properties of bulk-heterojunction (BHJ) films containing three representative electron acceptors. It is found that the films based on PC71BM, Y6, and PRi-C39 show sequential decreases in tensile modulus and increases in fracture strain and toughness. The nanoindentation moduli of the films based on these acceptors also vary accordingly. Creep analyses reveal a sequential decrease in creep deformation occurrence for the PC71BM, Y6, and PRi-C39-based films. Contact angle tests demonstrate that donor-acceptor interactions greatly affect the mechanical properties of these films. These findings highlight the importance of acceptor type in the multi-scale mechanical properties of BHJ films for the development of reliable flexible polymer solar cells (PSCs).
NPJ FLEXIBLE ELECTRONICS
(2023)
Article
Engineering, Mechanical
Mariyappan Arul Kumar, Laurent Capolungo
Summary: Predicting the effects of microstructure on high-temperature creep responses of steel components is critical to minimize the risks of failure and maximize economic viability in the energy sector. In this study, an advanced mechanistic constitutive model is used to investigate the influence of microstructure on creep responses and to explain the variability in the performance of grade-91 alloy. The model accurately predicts steady-state creep rates and primary-to-secondary transients for a wide range of creep conditions, and can also extrapolate the creep response of grade-91 alloy outside of the calibration regime. The study shows that the initial microstructure, characterized by grain size, dislocation density, and precipitate content, plays a significant role in the creep response, with the significance varying with stress and temperature. Comparing the model predictions with experimental data reveals that the differences in creep responses can be rationalized based on differences in the initial microstructure.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Huan Wang, Weifeng Xu, Hongjian Lu, Yuli Liu
Summary: The study found that the through-thickness creep properties of FSW joints deteriorate gradually from the top to the bottom, which is related to the grain size, fraction of low-angle grain boundaries, and distribution of precipitates in the welded structure.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Ekin Selvi, Faiz Muhaffel, Halil Ibrahim Filiz, Ali Serdar Vanli, Murat Baydogan
Summary: This study investigated the impact of micro arc oxidation (MAO) coating on the creep resistance of AZ91 Mg alloy. The results showed that the MAO coating significantly reduced the creep rate of the alloy, decreased the stress, and provided thermal barrier properties.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Metallurgy & Metallurgical Engineering
Vadapally Rama Rao, Deepak K. Pattanayak, C. Vanitha
Summary: AlSi10Mg alloy is widely used in the aerospace and automotive industries. Selective Laser Melting (SLM) is a commonly used technique to manufacture components of AlSi10Mg alloy, which shows better indentation resistance and hardness in the as-built condition compared to the solution heat treated condition.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Materials Science, Multidisciplinary
R. Mahmudi, M. Shalbafi, M. Karami, A. R. Geranmayeh
MATERIALS & DESIGN
(2015)
Article
Materials Science, Multidisciplinary
R. Mahmudi, A. Maraghi, A. R. Geranmayeh
KOVOVE MATERIALY-METALLIC MATERIALS
(2017)
Article
Engineering, Electrical & Electronic
A. R. Geranmayeh, R. Mahmudi, F. Khalatbari, N. Kashi, G. Nayyeri
JOURNAL OF ELECTRONIC MATERIALS
(2014)
Article
Materials Science, Multidisciplinary
A. R. Geranmayeh, R. Mahmudi
MATERIALS CHEMISTRY AND PHYSICS
(2013)
Article
Nanoscience & Nanotechnology
R. Mahmudi, M. Pourmajidian, A. R. Geranmayeh, S. Gorgannejad, S. Hashemizadeh
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2013)
Article
Materials Science, Textiles
Nabiollah Zareei, Abdolreza Geranmayeh, Reza Eslami-Farsani
FIBERS AND POLYMERS
(2019)
Article
Materials Science, Characterization & Testing
Nabiollah Zareei, Abdolreza Geranmayeh, Reza Eslami-Farsani
Article
Nanoscience & Nanotechnology
Seyed Masoud Ashrafizadeh, Reza Mahmudi, Abdol Reza Geranmayeh
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Materials Science, Textiles
S. M. Saleh Mousavi-Bafrouyi, Reza Eslami-Farsani, Abdolreza Geranmayeh
Summary: The flexural and impact properties of hybrid composites consisting of thin-ply unidirectional carbon fibers and basalt fabrics were studied. Embedding the thin-ply UD carbon fibers in the laminates significantly improved the flexural and impact properties. The highest flexural strength and modulus were achieved when the thin-ply UD carbon fibers were placed at the outermost layers. Placing the fibers at the center changed the failure behavior and resulted in a pseudo-ductile behavior.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Materials Science, Textiles
S. M. Saleh Mousavi-Bafrouyi, Reza Eslami-Farsani, Abdolreza Geranmayeh
Summary: This study investigated the temperature effects on the flexural and Charpy impact behavior of thin-ply unidirectional carbon-basalt fibers/epoxy hybrid composites. The results showed that the position of the thin-ply UD carbon fibers in the laminates significantly affected the properties of the composites.
FIBERS AND POLYMERS
(2021)
Article
Materials Science, Multidisciplinary
H. Sadeghi, A. R. Geranmayeh
Summary: Increasing Bi content improves the creep resistance of AZ61-0.7Si-xBi cast magnesium alloys, mainly due to the higher volume fraction of thermally stable Mg3Bi2 intermetallic particles.
MATERIALS SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
G. Faraji, M. Sabbaghian, A. R. Geranmayeh, R. Mahmudi
Summary: The microstructure, shear strength, and bio-corrosion behavior of extruded Mg-2Zn-1Mn, Mg-2Zn1Gd, and Mg-2Al-1Mn alloys were investigated for developing degradable implant alloys. The AM21 alloy showed higher strength and resistance to corrosion due to its uniform structure, finer grain size, and presence of an Al- and Mn-containing oxide layer on the surface. The new SSRS test proved to be a suitable method for studying stress corrosion cracking behavior in small Mg samples.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
A. Allami, A. R. Geranmayeh, R. Mahmudi
Summary: The addition of 0.2 wt% Sc to the AZ91 magnesium alloy resulted in a decrease in creep rates at all stress levels and temperatures. This was attributed to the formation of thermally stable Al3Sc and Mg5Al4Sc particles, reduction in the quantity of the unstable b-Mg17Al12 phase, and solid solution strengthening of Al in the Mg matrix.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Dentistry, Oral Surgery & Medicine
Allahyar Geramy, Reza Mahmuodi, Ali Reza Geranmayeh, Elahe Soltanmohamadi Borujeni, Homa Farhadifard, Hojat Darvishpour
INTERNATIONAL ORTHODONTICS
(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)