Article
Engineering, Mechanical
Hsin Shen Ho, Cheng Lv, Wenlong Zhou, Erliang Zhang
Summary: This study focuses on the investigation of low-cycle fatigue performance of gradient structured (GSed) 316 austenitic steels under high strain amplitude loading conditions. The results reveal that GSed steels have inherently lower fatigue life compared to their coarse-grained counterparts. The analyses using energy-based criterion show that the reduction in fatigue life of GSed steels is attributed to the decreased capability of damage accumulation and the lack of ability to effectively diffuse damage.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Mechanical
Xiangkang Zeng, Conghui Zhang, Wenguang Zhu, Mingliang Zhu, Tongguang Zhai, Xiaomei He, Kangkai Song, Zhuohang Xie
Summary: The cyclic deformation behaviors and damage mechanisms of pure Zr were investigated. The cyclic stress response was mainly influenced by substructure evolutions. Prismatic < a > dislocation slip was identified as the dominant deformation mechanism. Fatigue damage was not only influenced by the initial texture, but also other factors.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Yang Zhao, Zunyue Yu, Qianyu Wang, Xuepeng Ren, Shubin Ren, Xuanhui Qu
Summary: This study prepared near-equiatomic NiTi wires with excellent cyclic tensile fatigue life and proposed the mechanism by which deformation microstructure impacts fatigue life. The fatigue life of Ni50.2Ti49.8 was discovered to be 1.8-2.1 times greater than Ni50.9Ti49.1. Ni50.2Ti49.8 utilizes twinning, stacking faults, and wave dislocations to coordinate deformation and has a stronger pinning influence on dislocation movement, leading to extended fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Yang Guang, Du Guojun
Summary: The microstructure of martensitic steel was analyzed using transmission electron microscopy and X-ray diffraction. Low-cycle fatigue (LCF) tests were conducted on martensitic steel with different strain amplitudes using an MTS universal hydraulic servo testing machine. The damage accumulation and cyclic elastic-plastic constitutive model of martensitic steel were studied, and the influence of tempering on hysteretic loop and fatigue damage was discussed. With the tempering temperature increasing, the area of the hysteresis loop increased, hysteresis energy increased, and fatigue life decreased.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
C. Lavogiez, C. Dureau, Y. Nadot, P. Villechaise, S. Hemery
Summary: The fatigue behavior of Ti-6Al-4V with a bi-modal microstructure was investigated using different waveforms, load ratios, and frequencies. It was found that cracks were initiated along (0001) twist grain boundaries, which is consistent with prior studies. The results also showed that the critical microstructural configurations were not sensitive to environmental factors, free surfaces, loading conditions, and microstructure and composition.
Article
Engineering, Mechanical
N. Dudova, R. Mishnev, R. Kaibyshev
Summary: The correlation between cyclic softening and microstructural evolution was studied in a 10%Cr steel tested at 650°C using interrupted low cycle fatigue (LCF) tests with a low strain amplitude of &PLUSMN;0.2%. It was found that cyclic softening was mainly attributed to a decrease in friction stress due to dislocation annihilation, while back stress remained more stable due to additional precipitation on the lath boundaries despite intense lath widening caused by the disappearance of lath boundaries.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Victor Ribeiro, Jose Correia, Antonio Mourao, Grzegorz Lesiuk, Aparecido Goncalves, Abilio De Jesus, Filippo Berto
Summary: This paper investigates the low-cycle fatigue modeling based on the Huffman approach considering strain energy density and dislocation density. Various methodologies for evaluating low-cycle fatigue strength and exploring different dislocation density parameters are suggested through analysis and simulation of experimental data. The study provides probabilistic fields for the low-cycle fatigue behavior of metals through Monte Carlo stochastic simulations.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
L. Collini, A. Pirondi
Summary: The triaxiality of stress has an impact on the damage and failure of ductile metals. This study investigates the effect of triaxiality on the low-cycle fatigue (LCF) of ductile cast iron, using a multilevel approach that homogenizes the response of a microstructural model in a notched specimen. The results indicate that triaxiality shortens the fatigue life, and the notch effect on the fatigue life of cast iron can be explained by the combined effects of microstructure and applied triaxiality.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Nanoscience & Nanotechnology
Masayoshi Kumagai, Koichi Akita, Masatoshi Kuroda, Stefanus Harjo
Summary: The study found that the dislocation density of austenitic stainless steel increased with the number of plastic deformation cycles, but began to decrease after a certain number of cycles. The changes in different types of dislocations during cyclic loading significantly affected the crystal structure and flow stress.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Jinshan He, Ling Lin, Pinpin Hu, Chengbo Xiao, Yongwang Kang, Xitao Wang
Summary: The low cycle fatigue behaviors of the Co-Al-W-Ti-Ta single crystal superalloy were systematically investigated at different temperatures, and it was found that the slip mode changed with temperature, from planar slip to wavy slip. This finding provides a new direction for the design of high-performance single-crystal superalloys.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Nanoscience & Nanotechnology
Le Chang, Chao Lv, Takayuki Kitamura, Wei Zhang, Chang -Yu Zhou
Summary: The low cycle fatigue behavior of commercially pure titanium under different loading directions was investigated. The study found that the loading direction had significant effects on fatigue properties. Through a comprehensive analysis, the anisotropic slip behavior was found to play a critical role in fatigue behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Zhanguang Zheng, Changji Xie, Junxiang Chen, Zeng Huang
Summary: A constitutive model combining crystal plasticity and isotropic continuum damage mechanics is proposed to analyze the mechanical behavior and fatigue damage of metals. The model considers the effects of stress triaxiality and Lode parameter on fatigue damage, and the slip strength is related to the evolution of dislocations. Simulation on a polycrystalline aggregation of 7075 aluminum alloy demonstrates that grains with low Schmid factor are more prone to severe damage. The proposed model provides insights into damage evolution in polycrystalline metals.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Nanoscience & Nanotechnology
Peng Hu, Kun Liu, Lei Pan, X. -Grant Chen
Summary: The effects of Mg addition on the cyclic deformation and fatigue life behaviors of Al-Cu 224 cast alloys were investigated. It was found that alloys with higher Mg content had lower cyclic softening. Near-surface porosity and brittle intermetallic particles were considered as sources of crack initiation. The addition of Mg enhanced the fatigue performance under low cycle fatigue, but led to a slight reduction in fatigue performance under out-of-phase thermo-mechanical fatigue.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Engineering, Mechanical
Chengyan Bai, Liang Lan, Ruyi Xin, Shuang Gao, Bo He
Summary: The low cycle fatigue behavior of Ti-6Al-4 V alloy manufactured via electron beam melting (EBM) was studied. The relationship between fatigue property, internal stress and microstructure was established to understand the cyclic-deformation behavior and LCF life of EBM Ti-6Al-4 V alloy. It was found that the LCF life of EBM Ti-6Al-4 V is comparable to the wrought counterparts under low strains and higher than that of selective laser melted Ti-6Al-4 V reported. Tension-compression asymmetry and cyclic softening behavior were observed at different strains, and the anisotropy of tension-compression increased with increasing strain due to the increase of back stress and the decrease of friction stress. The formation of sub-grain boundaries and fragmented beta phase reduced friction stress, resulting in cyclic softening.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Multidisciplinary
C. Kumar, P. S. M. Jena, R. K. Singh, G. A. Harmain, J. K. Sahu
Summary: During isothermal strain-controlled fatigue tests of nickel-base superalloy IN740H at 760 degrees C, the highest fatigue life is observed under a strain ratio of 0, while a strain ratio of 0.5 results in lower fatigue life. The segregation of Nb at dislocations and formation of Nb(CN) at grain boundaries under a strain ratio of 0 contribute to fatigue strengthening, while debonding of Nb(CN) and the matrix lead to lower fatigue life under a strain ratio of 0.5.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2021)
Article
Nanoscience & Nanotechnology
Bo Xiao, Lianyong Xu, Lei Zhao, Hongyang Jing, Yongdian Han, Kai Song
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Materials Science, Multidisciplinary
Kaimeng Wang, Hongyang Jing, Lianyong Xu, Yongdian Han, Lei Zhao, Bo Xiao, Shangqing Yang
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Engineering, Mechanical
Kai Song, Lei Zhao, Lianyong Xu, Yongdian Han, Hongyang Jing
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2019)
Article
Engineering, Mechanical
Haizhou Li, Hongyang Jing, Lianyong Xu, Yongdian Han, Lei Zhao, Zhengxin Tang, Kai Song
INTERNATIONAL JOURNAL OF FATIGUE
(2019)
Article
Materials Science, Multidisciplinary
Lei Zhao, Kai Song, Yu Zhang, Shan Meng, Lianyong Xu, Yongdian Han, Hongyang Jing
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2019)
Article
Nanoscience & Nanotechnology
Lei Zhao, Kai Song, Lianyong Xu, Yongdian Han, Hongyang Jing, Haizhou Li, Yu Zhang
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
Kaimeng Wang, Hongyang Jing, Lianyong Xu, Yongdian Han, Lei Zhao, Wangyu Hu, Huiqiu Deng
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2020)
Article
Engineering, Mechanical
Lei Zhao, Kai Song, Lianyong Xu, Yongdian Han, Hongyang Jing, Yu Zhang, Haizhou Li
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2019)
Article
Engineering, Mechanical
Kai Song, Lei Zhao, Lianyong Xu, Yongdian Han, Kangda Hao
Summary: Creep-fatigue interaction plays a crucial role in the failure of high-temperature components. This study aimed to predict the creep-fatigue life and modify the existing model to make it applicable to a wide range of materials and testing conditions. The modified model showed reasonable predictions within a scatter band of ±1.5, based on experimental data of different materials.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Mechanical
Kai Song, Kaimeng Wang, Libin Zhang, Lei Zhao, Lianyong Xu, Yongdian Han, Kangda Hao
Summary: A novel model for revealing the low cycle fatigue (LCF) fracture mechanism was established using molecular dynamics, extended finite element method, and representative volume element technology. The model was able to accurately simulate LCF crack formation and propagation, and was validated using microstructural fractography and 3D X-ray computed tomography. The proposed model demonstrated potential in understanding the correlation between microstructure and LCF fracture mechanism, and identified different formation mechanisms for secondary cracks.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
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)