Article
Chemistry, Physical
Fagui Li, Xiyu Chen, Yuannan Wang, Guolong Zhao, Yinfei Yang
Summary: This paper focuses on measuring the creep stress exponent of TC17 titanium alloy at room temperature using the nanoindentation method. The study investigates the effects of loading rate and maximum load on the experimental results. The findings show that within the specified ranges, the influence on the experimental results is insignificant, and the creep stress exponent distribution for TC17 titanium alloy at room temperature is 8.524-8.687.
Article
Materials Science, Multidisciplinary
Zhenlin Xu, Lei Yang, Xiaojie Du, Zhaodong Li, Zhongmin Yang, Xiquan Jia, Yizhu He
Summary: Fire resistance and seismic performance are crucial factors in the design of construction steel. Q460FRE steel showed excellent fire resistance with 67.4% yield strength at 600 degrees C, as evaluated through creep test and internal friction analysis.
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
Chemistry, Physical
Takahiro Mineta, Haruto Saijo, Hiroyuki Sato
Summary: The high temperature uniaxial tensile creep deformation behavior of (alpha + beta)-Mg-9 mass%Li-4 mass%Al-1 mass%Zn (LAZ941) alloy was investigated, and it was found that the creep strength of the LAZ941 alloy was significantly improved by heat treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Y. Zou, J. W. Guo, Y. Q. Xiao, W. Zhu
Summary: This paper investigates the high-temperature creep behavior of a thermally grown oxide (TGO) layer and identifies dislocation creep as the main creep mechanism. The creep strain rate of TGO is dependent on temperature and applied stress, with increasing temperature and stress leading to failure behavior of the TGO layer.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Biomedical
Babak N. Safa, A. Thomas Read, C. Ross Ethier
Summary: ONH biomechanics plays a central role in glaucoma pathogenesis. By conducting micromechanical testing and finite element modeling on porcine ONH tissue samples, this study provided detailed descriptions of ONH viscoelastic properties and identified a dual mechanism of fluid flow and solid matrix viscoelasticity in the mechanical response of ONH. The obtained properties can be utilized for designing ex vivo test environments and understanding glaucoma pathophysiology.
ACTA BIOMATERIALIA
(2021)
Article
Construction & Building Technology
Chunlei Dong, Shang Zhang, Jie Wang, Ying Hei Chui
Summary: Furfurylation treatment of wood can effectively reduce creep deformation, and furfurylated wood exhibits different creep performance compared to untreated wood in various stress levels and relative humidity environments.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Ceramics
Ma Denghao, Hou Zhenhua, Li Junping, Sun Xin, Jin Enze, Yin Jian
Summary: The microstructure and static mechanical properties of SiC/SiC composites with an interphase layer were found to be superior to those without an interlayer, with lower internal friction. The sub-layer SiC of the PyC/SiC interface limits the binding state and plastic deformation of PyC, improving the mechanical properties of the composite. Additionally, the interfacial shear strength is inversely proportional to internal friction, leading to a decrease in internal friction with increased interfacial shear strength.
JOURNAL OF INORGANIC MATERIALS
(2021)
Article
Chemistry, Physical
Tiffany Wu, David C. Dunand
Summary: This study investigates the microstructure and thermomechanical properties of Al11Ce3, an intermetallic compound that strengthens Al-Ce based eutectic alloys. The results show that Al11Ce3 is hard and brittle, with coarse and elongated grains and internal twins. The thermal expansion coefficient and oxidation kinetics of Al11Ce3 vary with temperature. At 500 degrees C, Al11Ce3 exhibits extensive plastic creep deformation. The study also found that the creep resistance of Al11Ce3 at 500 degrees C is similar to that of L1(2)-Al3Sc.
Article
Environmental Sciences
Gang Bi, Cun Ren, Hongzhong Xu, Dongqi Jiang
Summary: The creep behavior of cohesive soils is closely related to the plasticity index. This study proposes a creep model to investigate the relationship between creep and plasticity index in different soils. The results show that creep exponent increases with plasticity index for the same type of soil, but there is no clear trend between different types of soils. Additionally, the speed of creep failure is not solely determined by the creep exponent, but also depends on the stress-strain curve.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Engineering, Geological
Wang-Qi Xu, Zhen-Yu Yin, Yuan-Yuan Zheng
Summary: In this study, atomistic models were constructed to investigate the interfacial properties between fiber-reinforced polymer (FRP) and sand at the nano-scale through molecular dynamics simulations. The findings revealed a linear relationship between friction force and normal load, an increase in friction force with sliding velocity, and a decrease in friction force with water content. Additionally, the shear stress level affected the creep characteristics. The results of this study can be applied to improve the current contact laws of sand-FRP structure in micromechanics-based modeling approaches.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2023)
Article
Construction & Building Technology
Jiange Li, Aimin Sha, Wei Jiang, Xueyuan Ren
Summary: This study investigates the internal mechanical response of asphalt mixture to creep behavior using a built-in Smart Aggregate. The study finds that the inter-particle forces in asphalt mixture during creep tests are uneven. The measured force increases monotonously with increasing strain. The study establishes a regression model for the relationship between force and voltage and finds linear relationships between different stages.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yingfei Guo, Shulong Xiao, Jing Tian, Zhenquan Liang, Lijuan Xu, Jie Zhou, Yuyong Chen
Summary: The paper investigates the creep behavior of Ti-42Al-6Nb-0.05Y(2)O(3) alloy. The stress exponent varies with creep stress and the dominant creep mechanisms differ at different stress levels. Inter-granular cracks and nucleation of cracks along lamellar interfaces contribute to the failure at high and low stress, respectively. The activation energy transition temperature (AETT) and the role of dislocation movements are also discussed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Geography, Physical
Yuan Li, Ian Baker
Summary: Constant-load creep tests were conducted on firn cores extracted from Summit, Greenland in June 2017, with primary creep behavior described using an Andrade-like equation. Secondary creep occurred at strains of 0.5-3%, and in some cases, not observed at all under certain conditions.
JOURNAL OF GLACIOLOGY
(2022)
Article
Engineering, Geological
Partha Pratim Mandal, Joel Sarout, Reza Rezaee
Summary: The short-term creep behavior of gas shale was studied through laboratory triaxial tests on ten Goldwyer shale samples in the Canning Basin. The data revealed differences in creep strain between clay and organic-rich rocks compared to carbonates. The anisotropic nature of creep was observed depending on the direction of axial stress application. The study also proposed a new model for estimating stress accumulation over time and its impact on hydraulic fracturing simulation.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
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)