Article
Materials Science, Multidisciplinary
Yunpeng Zhu, Jiayu Qin, Jinhui Wang, Peipeng Jin, Peijie Li
Summary: The strain hardening behavior of AZ91 alloys fabricated by spark plasma sintering (SPS) under different sintering temperatures was investigated through compression tests at room temperature. The sintered AZ91 alloys with random texture showed high yield strength and significant strain hardening ability. The hardening abilities, including strain hardening rate, strain hardening exponent, and hardening capacity, increased with increasing sintering temperature. The strain hardening in the sintered AZ91 alloys was mainly controlled by dislocation slip and accompanied by extension twinning. The increase in hardening abilities was primarily attributed to the enhanced dislocation-induced strain hardening due to the accelerated rate of dislocation propagation caused by coarse grains. Additionally, the strain hardening induced by twinning was suppressed by fine grains and intragranular lamellar Mg17Al12 precipitates.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Deping Zhang, Dongdong Zhang, Yaqin Zhang, Shanrong Chen, Tao Xu, Jian Meng
Summary: The ductile Mg-Yb based alloy shows better strain hardening ability and formability at room temperature compared to high-formable Mg alloys. The alloy exhibits four strain hardening stages labeled as stage I, II, III, and IV, different from the majority of Mg alloys, with stage II characterized by an increased strain hardening rate rather than plateau or decrease.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Wenchao Hu, Wanyi Huang, Ying Sun, Wen Zhang, Lili Tan, Song Zhang, Guangcai Ma, Dan Zhang, Qiang Wang
Summary: In this study, fatigue properties of Mg-2Zn-0.5Zr-0.5Nd alloy were tested and it was found that the fatigue life varies with different frequencies. It was also observed that the alloy exhibits poorer fatigue resistance in 0.9 wt% NaCl solution.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Luiz Carneiro, Duke Culbertson, Qin Yu, Yanyao Jiang
Summary: The study experimentally characterized the mechanical response and microstructure evolution of a rolled AZ31B magnesium alloy using companion thin-walled tubular specimens under free-end monotonic torsion. It was found that the shear stress-shear strain response exhibits a sigmodal shape with four distinctive stages of strain hardening, involving basal slips, tension twinning, and compressing twinning. The formation of twin-twin boundaries (TTBs) and the collective hardening effects by twin boundary (TB) and TTB contribute to a unique rise in strain hardening rate in certain stages. Further observations of different types of twins and their interactions provide insights into the deformation mechanisms during different stages of the process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Chong Yang, Guoguo Zhu, Bin Li, Yan Peng, Baodong Shi
Summary: The difference in mechanical behavior between fixed-end and free-end torsion is investigated in this study. The end constraint affects the strain hardening behavior, with fixed-end torsion dominated by prismatic slip and free-end torsion exhibiting two stages of strain hardening. The axial effect is sensitive to forward and reversal torsion, and the difference in axial stress under fixed-end torsion is attributed to twin growth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Xi Zhao, Pengcheng Gao, Gang Chen, Jianfeng Wei, Zhuang Zhu, Fafa Yan, Zhimin Zhang, Qiang Wang
Summary: The study investigated the effect of precipitates on the strain-controlled fatigue of automobile wheel disks made of extruded AZ80 magnesium alloy using T5 and T6 peak aging. It was found that the T5 peak aging treatment significantly enhanced the fatigue life at intermediate strain amplitudes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Yanchun Zhu, Qinghua Wang, Zhiquan Huang, Ling Qin, Ziliang Li, Lifeng Ma
Summary: The flow curves of as-cast AZ31B magnesium alloy during high temperature deformation were obtained through a thermal compression test. The effects of deformation amount, grain size, strain rate, and deformation temperature on flow stress, strain rate sensitivity index, and strain hardening index were analyzed. The study has significant implications for guiding the selection of process parameters in the plastic processing of as-cast AZ31 magnesium alloy.
Article
Materials Science, Multidisciplinary
Yingchao Guo, Yongfeng Liang, Junpin Lin
Summary: An in-situ dual morphology carbide and boride reinforced Ti-47.7Al-7.1Nb-2.3 V-1.1Cr (at%) alloys were fabricated with nano-B4C addition by spark plasma sintering (SPS). The addition of 0.2 at% nano-B4C significantly refined the lamellar colony size from 126 +/- 45 μm to 45 +/- 15 μm and improved the ultimate tensile strength (UTS) by 105 MPa. The improvement in tensile property is attributed to the multiple strengthening induced by Ti2AlC micron/nanoparticles and TiB2 nanoparticles.
Article
Nanoscience & Nanotechnology
Yangchao Deng, Wei Sun, Yang Yang, Hongyi Zhan, Kun Yan, Guang Zeng
Summary: The impacts of Mg2Sn precipitation on the age-hardening and deformation behavior of a Mg-4Sn-3Al-1Zn alloy have been studied. The alloy shows moderate hardening during ageing treatment at 175℃, with a significant increase in yield tensile strength but reduced elongation. Nanosized Mg2Sn precipitates are uniformly distributed within grains, improving tensile strength properties. Coarsened Mg2Sn precipitates and precipitate-free zones (PFZs) can be observed along grain boundaries. Tensile deformation primarily occurs in slip band array regions in grain interiors for the solution-treated alloy, and in PFZs for the as-aged alloy. The decrease in tensile ductility is caused by early intergranular microcracks initiated by coarse grain boundary Mg2Sn precipitates and PFZs. The results provide insights for developing affordable Mg alloys with a balanced combination of strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Olga Samoilova, Nataliya Shaburova, Ahmad Ostovari Moghaddam, Evgeny Trofimov
Summary: The microstructure, phase composition, microhardness, and wear resistance of Al0.25CoCrFeNiSi0.6 high entropy alloy (HEA) were studied. The formation of Cr3Si intermetallics was found to be correlated with the high microhardness of the alloy, which was measured to be 710 +/- 25 HV0.3. Additionally, the alloy exhibited a high degree of wear resistance with a wear rate of (3.1 +/- 0.5) x 10-5 (mm3 center dot N-1 center dot m-1).
Article
Engineering, Mechanical
Yao Chen, Qi Shuai, Yujuan Wu, Liming Peng, Xiaohong Shao, Fulin Liu, Chao He, Lang Li, Yongjie Liu, Qingyuan Wang, Shaoxiong Xie, Qiang Chen
Summary: Hierarchical anisotropic nanostructured Mg-RE alloys with LPSO lamellae and dense nano-precipitates have superior mechanical properties, but their long-term reliability, especially in terms of fatigue, is still a concern. Scattered oxide nodules are found to be a special kind of fatigue damage that promotes crack initiation, instead of the typical slip-band structure. The LPSO lamellae and dense β′ nano-precipitates contribute to the localization of fatigue damage. Fatigue-induced oxide nodules form and grow within the soft α-Mg layer, but their growth is constrained by the adjacent strong LPSO lamellae, resulting in microcrack nucleation. Finally, clusters of microcracks along the LPSO/oxide interface converge to initiate transgranular cracking.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Chemistry, Physical
Yan Wang, Yuhua Chen, Jilin Xie, Jiaming Ni, Timing Zhang, Shanlin Wang, Limeng Yin
Summary: The Al matrix composites with varying HEA addition were fabricated by RFE process. The microstructure study revealed reduced grain size and formation of second phases in the composites. The UTS increased with HEA content, reaching a maximum of 150.8% improvement compared to RFEed Al. The mechanical properties improvement was attributed to grain refinement, strengthening mechanisms, and the presence of second phases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Z. H. Li, C. Hong, Y. G. Zhao, Y. Hu, Y. H. Lu, T. Shoji
Summary: The cyclic deformation behavior and cracking mechanism of Alloy 690TT steam generator tube were studied using a boat-shaped specimen and supporting fixtures. Results showed that Alloy 690TT exhibited serrated secondary cyclic hardening and fatigue crack initiation at elevated temperature. Under elevated temperature fatigue, deformation twins burst at grain boundaries, leading to serrated secondary cyclic hardening. This resulted in a lower fatigue life compared to room temperature air.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Xixi Dong, Hamza Youssef, Xiangzhen Zhu, Yijie Zhang, Shihao Wang, Shouxun Ji
Summary: The addition of titanium diboride nanoparticles can enhance the strength and maintain ductility of die-cast AlSi9Cu2Mg alloy. Fe-rich compounds and Q-phase were prone to cracking after the addition of titanium diboride nanoparticles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Chaofeng Liu, Xiangyi Jiao, Harood Nishat, Saria Akhtar, Stuart Wiesner, Zhipeng Guo, Shoumei Xiong
Summary: The microstructure and mechanical properties of a newly developed Al-4Mg-2Fe alloy prepared via high pressure die casting were studied. Three types of iron-rich intermetallic compounds (IMCs) were identified in the alloy, with some influencing crack initiation and propagation, while others had minimal effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Fuyong Cao, Bo Xiao, Ziming Wang, Tao Ying, Dajiang Zheng, Andrej Atrens, Guang-Ling Song
Summary: This study investigated the corrosion behavior of different alloys in a salt solution and found that Mg 64 Zn 36 alloy has an amorphous microstructure, lower corrosion rate, and no hydrogen evolution during corrosion. This is a new approach to prevent hydrogen evolution during Mg alloy corrosion.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Metallurgy & Metallurgical Engineering
Jin-Meng Wang, Xiang Sun, Liang Song, M. Bobby Kannan, Fen Zhang, Lan-Yue Cui, Yu-Hong Zou, Shuo-Qi Li, Rong-Chang Zeng
Summary: This study investigated the effects of intermetallic compounds on the formation mechanism of Mg-Al layered double hydroxide (LDH) steam coatings and the corrosion behavior. The results showed that citric acid pretreatment significantly influenced the activity of the alloy surface, promoting the growth of the coatings and improving the corrosion resistance of the coated alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Review
Materials Science, Multidisciplinary
Andrej Atrens, Evan Gray, Jeffrey Venezuela, Joshua Hoschke, Maximilian Roethig
Summary: This review paper introduces a research project that aims to quantify the inhibition of gaseous hydrogen embrittlement by oxygen, with potential application in gas transmission pipelines. It summarizes compelling laboratory evidence that oxygen may inhibit gaseous hydrogen embrittlement. Quantification of the oxygen inhibition of gaseous hydrogen embrittlement is necessary in order to evaluate the effectiveness of this approach in inhibiting hydrogen embrittlement in gas transmission pipelines. The experimental approach involves quantifying the amount of hydrogen entering the steel from hydrogen-containing gas mixtures using a purpose-built gas phase permeation cell.
Article
Engineering, Biomedical
Lixin Long, Yang Song, Xiaoyi Tian, Lanyue Cui, Chengbao Liu, Shuoqi Li, Yu Wang, Rongchang Zeng
Summary: This study prepared a micro-arc oxidation/polymethyltrimethoxysilane (MAO/PMTMS)@hemin-induced calcium-bearing phosphate microsphere (Hemin-CaP) coating and applied it to magnesium bone implants, demonstrating rapid and effective bacteriostasis and broad-spectrum antibacterial activity.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Cell & Tissue Engineering
Zhengmao Li, Qing Zhang, Shuang Yang, Yuncang Li, Andrej Atrens, Jagat Rakesh Kanwar, Wen Zhong, Bingpeng Lin, Cuie Wen, Yinghong Zhou, Yin Xiao
Summary: An optimized procedure for calibrating mu CT parameters using histological data was developed to reduce the impact of metal artifacts on data analysis. The application of optimized parameters resulted in more accurate 3D images and realistic statistical data. This method can effectively reduce the influence of metal artifacts on data analysis to some extent.
TISSUE ENGINEERING PART C-METHODS
(2023)
Review
Metallurgy & Metallurgical Engineering
Shi-Qi Pan, Fen Zhang, Cuie Wen, Rong-Chang Zeng
Summary: The LDH steam coating technique can effectively inhibit the corrosion of magnesium alloys by providing a coating with ion-exchange function. It is environmentally friendly and cost-effective, and provides precise control over film thickness. This review provides comprehensive insights into the growth mechanism and corrosion behavior of LDH steam coatings, and explores the influencing factors, offering new perspectives for the development of this technique.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Zahrina Mardina, Jeffrey Venezuela, Teddy Sjafrizal, Zhiming Shi, Matthew S. Dargusch, Andrej Atrens
Summary: This study investigated the effects of annealing heat treatments on the microstructure, corrosion, and mechanical behavior of wires made from Mg alloy WE43 and Zn alloy Zn7Ag. The strain rate had minimal influence on the mechanical properties of WE43, while decreasing strain rate decreased the strength and increased the ductility of Zn7Ag due to creep. Annealing heat treatments had little effect on the corrosion rate of both alloys, and had minimal impact on the mechanical properties of WE43, but tended to decrease ductility and eliminate strain softening in Zn7Ag.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Futao Dong, Jeffrey Venezuela, Huixing Li, Zhiming Shi, Qingjun Zhou, Liansheng Chen, Jun Chen, Linxiu Du, Andrej Atrens
Summary: The effect of Cu alloying on hydrogen embrittlement (HE) in TWIP steel was investigated. Cu alloying influenced HE resistance through several mechanisms including the increase in stacking fault energy, refinement of austenite grains, reduction of diffusible hydrogen content, and dispersion of mechanical twins by Cu precipitate/Cu-rich clusters. Among these mechanisms, (iv) exhibited the greatest improvement in HE resistance in the 700°C annealed Cu-alloyed TWIP steel.
Article
Materials Science, Multidisciplinary
Xu Dai, Liang Wu, Wenjun Ci, Wenhui Yao, Yuan Yuan, Zhihui Xie, Bin Jiang, Jingfeng Wang, Atrens Andrej, Fusheng Pan
Summary: A novel MgAlY-Layered double hydroxides (LDHs) film loaded with salicylate is successfully prepared on flash-MAO coated AZ31 alloys, which greatly improves the corrosion performance by sealing the porous morphology. Self-healing measurements and characterizations demonstrate that the active corrosion protection originates from the corrosion inhibition and dual self-healing effects.
Article
Nanoscience & Nanotechnology
Yu Yin, Qiyang Tan, Nan Yang, Xingrui Chen, Wangrui Ren, Lei Liu, Houwen Chen, Andrej Atrens, Ninshu Ma, Han Huang, Ming-Xing Zhang
Summary: In this study, a cost-effective Fe35Ni35Cr20Mo5Al5 high entropy alloy (HEA) with ultrafine microstructure (UFM) was successfully produced by manipulating the concurrent precipitation and recrystallization process. The UFM-HEA exhibited exceptional mechanical properties, including high yield strength, tensile strength and uniform elongation, as well as superior corrosion resistance compared to 316L stainless steel. This strategy not only provides insights into the development of new-generation cryogenic HEAs, but also enhances their industrial application potential.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Metallurgy & Metallurgical Engineering
Tong Bu, Ruijie Jia, Tao Ying, Andrej Atrens, Pengbo Chen, Dajiang Zheng, Fuyong Cao
Summary: A novel coating on the Mg1Mn alloy was produced by anodic polarization combined with hydrothermal treatment (AP + H) in 0.1 M Na2CO3 solution. The coating consisting of MgCO3, Mg(OH)(2), and MgO provided satisfactory protection in 3.5 wt% NaCl, but showed increased corrosion rate after 72 hours. The failure of the coating was attributed to second phase particles or impurities in the matrix. The AP + H coating is considered suitable as a primer coating for Mg applications in kitchen ware, biomedical areas, or industry.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Qi Zou, Qichi Le, Liang Ren, Chunyan Ban, Chenglu Hu, Yunchang Xin, Qing Liu, Wenyi Hu, Songhua Chen, Andrej Atrens
Summary: The corrosion behavior of Nd alloyed magnesium alloy AZ80 in three simulated concrete pore solutions (SCPs) was investigated. The composition and pH value of the SCPs were found to have an effect on the corrosion properties of AZ80 and AZ80-1.0Nd. Corrosion mainly occurred in the form of localized corrosion along the transverse direction in the SCP solutions. AZ80 and AZ80-1.0Nd showed the best corrosion resistance in the SCP2 solution due to the formation of a dense protective film. AA6061 corroded severely in the SCP1 solution and suffered less corrosion in the SCP2 and SCP3 solutions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Biomedical
Li-Xin Long, Fen-Fen Chen, Lan-Yue Cui, Ze-Song Wei, Hai-Tao Wang, Rong-Chang Zeng, Yu-Feng Zheng
Summary: The microstructure, mechanical properties, and degradation rates of LX11 and LX41 alloys were studied through optical microscopy, tensile tests, and electrochemical tests. The LX11 alloy exhibited finer grains, fewer twins, and smaller intermetallic phase volume fractions compared to the LX41 alloy. Increasing Li concentration resulted in a slight decrease in yield strength, a substantial increase in elongation, and a stable ultimate tensile strength for the Mg-Li-Ca alloys. LX11 alloy showed superior corrosion resistance compared to LX41 alloy. The release rate of metallic ions in Hank's solution cannot accurately reflect the corrosion rate of Mg-Li-Ca alloys due to the formation of corrosion products and their solubility difference.
BIOACTIVE MATERIALS
(2023)
Article
Engineering, Biomedical
Kaining Yang, Lei Shen, Lin Zhang, Wenxin Sun, Yuhong Zou, Yande Ren, Rongchang Zeng
Summary: A new type of antimicrobial colloidal dressing, Ag-MMT/CS colloid, was successfully prepared and showed good antibacterial activity against Staphylococcus aureus, a common skin infection bacterium. It also exhibited cytocompatibility and promoted wound healing.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yuanyuan Wang, Chengbao Liu, Zuojun Jiao, Lei Cai, Cong Sun, Deming Wang, Lanyue Cui, Cuie Wen, Rong-Chang Zeng
Summary: This study investigates the corrosion behavior and mechanical properties of an extruded Mg-4Li-1Ca alloy under different micro-compressive stresses. The results show that micro-compressive stress can induce grain growth and precipitation of second-phase particles, accelerating the corrosion rate. However, when the stress level reaches a certain point, the volume fraction of the second phase becomes the dominant factor controlling the corrosion rate, and residual stress is released, forming corrosion product films that weaken the microstructural effect on corrosion behavior.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Engineering, Mechanical
Miloslav Kepka, Miloslav Kepka Jr, Radovan Minich
Summary: This paper focuses on the fatigue life evaluation of the bodywork of a new articulated electric (battery) bus. The findings resulted in recommendations to improve the operational reliability of a particular vehicle and provided challenges for future research.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
T. Dusautoir, B. Berthel, S. Fouvry, P. Matzen, K-D. Meck
Summary: This study investigates the impact of post-processing treatments on the fatigue limit of additive manufactured Ti-6Al-4V under stress gradients, with a focus on surface integrity.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Zhuofan Xia, Di Wu, Xiaochen Zhang, Jianqiu Wang, En -Hou Han
Summary: The study reveals the surface-initiated rolling contact fatigue (RCF) failure mechanism under heavy load and initial high roughness surface. The results indicate that precursor of collapsed morphology and nanocrystalline layer are the main factors causing lower RCF life with high roughness compared to low roughness surfaces. The spalling failure initiating from low roughness surface under heavy load is strongly dependent on surface plastic deformation.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Daniel Gren, Knut Andreas Meyer
Summary: Rolling contact loading can cause plastic deformation and fatigue cracks. Current rail standards do not consider the effect of plasticity on mechanical behavior. This study proposes a new method for evaluating the fatigue life of deformed material and finds that superimposed compressive axial loads can increase fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
R. Kumar, S. Sanyal, J. Bhagyaraj, E. Hari Krishna, S. Mukherjee, K. Prasad, S. Mandal
Summary: This study investigates the thermomechanical fatigue (TMF) behavior of Timetal 834 alloy under different loading conditions. The results show that the alloy exhibits different cyclic hardening and softening responses at different strain amplitudes. The strain amplitude and phase angle have significant effects on the TMF life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Kai Donnerbauer, Tobias Bill, Peter Starke, Ruth Acosta, Bharath Yerrapa, Christian Boller, Klaus Heckmann, Frank Walther
Summary: Given the aging of nuclear power plants, it is important to develop methods for evaluating the integrity of components and structures in nuclear engineering. Suitable nondestructive testing methods can detect material degradation and determine its fatigue life. This study utilized various NDT parameters and scanning electron microscopic methods to explore the relationship between microstructure evolution and NDT data.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Liuyong He, Jiang Zheng, Tianjiao Li, Houkun Zhou, Lihong Xia, Bin Jiang
Summary: This study quantitatively analyzed the effects of precipitates on the deformation mode, cracking mode, and mechanical behavior of WE54 magnesium alloy during low-cycle fatigue. It was found that precipitates promoted the activation of dislocation slip and suppressed the activation of twinning, affecting the cracking mode and mechanical behavior.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
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
Jingyu Yang, Bingbing Li, Yiming Zheng, Gang Chen, Xu Chen
Summary: Heat treatment is used to improve the low-cycle fatigue performance of additive manufactured 316LN stainless steel. The heat-treated material demonstrates initially cyclic hardening followed by softening behavior, and shows a stronger resistance to crack propagation compared to the as-built material, resulting in a longer fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Lang Zou, Dongfang Zeng, Xiong Chen, Jun Li, Hai Zhao, Liantao Lu
Summary: This study investigates the competitive relationship between fretting fatigue and plain fatigue in press-fitted railway axles. By changing the depth of the stress relief groove, the plain fatigue limit and fretting fatigue strength were tested. Detailed information was gathered, and an evaluation methodology integrating finite element simulation and the Modified Wohler Curve Method was established. The study concludes that the optimal groove depth, which balances the anti-fatigue capabilities, depends on the number of test cycles.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Davide Leonetti, Koji Kinoshita, Yukina Takai, Alain Nussbaumer
Summary: This paper investigates the fatigue behavior of non-load-carrying transverse welded steel attachments, including fatigue crack monitoring and fracture surface analysis under constant and variable amplitude loading. A procedure is proposed to obtain a Markov transition matrix based on the measured strain signal and to randomly resample the stress history for variable amplitude fatigue tests.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Zhe Zhang, Bing Yang, Yuedong Wang, Shoune Xiao
Summary: This paper presents a method for designing fatigue life prediction models with small sample sizes by handling limited sample data. The method integrates the equivalent structural stress method with the maximum likelihood estimation method and adds reliability verification, resulting in enhanced goodness of fit, stability, and optimized sample quantity.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Cooper K. Hansen, Gary F. Whelan, Jacob D. Hochhalter
Summary: This paper presents a method to address the computational demand issue of computing FIPs using CPFEM by developing an interpretable machine learning model. Genetic programming is used to evolve interpretable expressions of FIPs from microstructure features, and these models can serve as efficient substitutes for CPFEM and be easily integrated into engineering workflows.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Luca Susmel
Summary: This paper discusses the problem of estimating notch fatigue limits using machine learning. The results show that machine learning is a promising approach for designing notched components against fatigue. The accuracy in estimating the fatigue limit can be increased by increasing the size and quality of the calibration dataset, as well as including additional input features.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Kefeng Gao, Guoqi Tan, Yanyan Liu, Qiang Wang, Qian Tang, Xuegang Wang, Qiqiang Duan, Zengqian Liu, Zhe Yi, Zhefeng Zhang
Summary: Bioinspired architectures have significant effects on material enhancement. This study investigates the fatigue properties of bioinspired ceramic-polymer composites and natural nacre, revealing the close relationship between architectural types, orientations, fatigue performance, and damage mechanisms.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
