International Journal of Fatigue最新文献

{"title":"Microstructure-sensitive crystal plasticity and fatigue indicator modeling for LZ50 steel","authors":"Shuwei Zhou ,&nbsp;Mian Huang ,&nbsp;Christian Häffner ,&nbsp;Sophie Stebner ,&nbsp;Min Cai ,&nbsp;Zhichao Wei ,&nbsp;Bing Yang ,&nbsp;Sebastian Münstermann","doi":"10.1016/j.ijfatigue.2025.109302","DOIUrl":"10.1016/j.ijfatigue.2025.109302","url":null,"abstract":"<div><div>The fatigue performance of railway axle steel is highly sensitive to microstructural heterogeneities and internal defects, which are inadequately captured by conventional life prediction methods. Motivated by this, a two-stage fatigue life prediction framework for LZ50 steel is employed that integrates the crystal plasticity finite element method with fatigue indicator parameters to account for microstructure-sensitive fatigue processes, including crack initiation and microstructurally short crack growth. To establish a typical experimental foundation, microstructural characterization via electron backscatter diffraction and scanning electron microscopy, displacement-controlled uniaxial tensile tests, and strain-controlled fatigue experiments were conducted. Representative volume elements were constructed based on the characterized microstructures, and crystal plasticity parameters were calibrated against both tensile and fatigue test results obtained at a strain amplitude of 0.9%, and further validated at amplitudes of 0.45%, 0.6%, and 0.75%. Compared to the approaches based on conventional fatigue indicator parameters, the two-stage framework that decouples crack initiation and microstructurally short-crack growth significantly improves prediction accuracy, with all results falling within the <span><math><mrow><mo>±</mo><mn>1</mn><mo>.</mo><mn>5</mn><mo>×</mo></mrow></math></span> scatter band. The microstructurally short crack growth stage is found to contribute more than 50% of the total fatigue life. Furthermore, the effects of inclusions and pores with varying size, shape, and stiffness are systematically investigated. This study provides an effective and physically grounded framework for fatigue life prediction of defect-containing microstructures in structural steels.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109302"},"PeriodicalIF":6.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An improved constitutive model based on two-surface theory considering strain-amplitude and loading-history dependence","authors":"Shuai Zheng","doi":"10.1016/j.ijfatigue.2025.109290","DOIUrl":"10.1016/j.ijfatigue.2025.109290","url":null,"abstract":"<div><div>The mechanical behaviors of austenitic stainless steel S31608 were investigated under monotonic tensile and cyclic loading conditions with a wide range of strain amplitudes. Results indicated that it represented unsaturated long-range cyclic softening/hardening before fracture, pronounced strain-amplitude and loading-history dependence. First, the framework of combined hardening was applied to the experimental data to study the variations in a series of plastic state variables, including the elastic modulus and plastic hardening characteristics. Secondly, building on these insights, a comprehensive constitutive model was developed based on two-surface theory, consisting of a yield surface and boundary surface. Novel nonlinear isotropic and kinematic hardening rules were proposed to incorporate the complex properties mentioned above. Four major mechanisms of boundary evolution were proposed to reflect the influences of strain range and loading protocol. Finally, to benchmark the model’s predictive capability, the proposed model alongside the Updated Voce-Chaboche (UVC) model, YU model, and He model were implemented and compared their predictions against test results. The comparison results demonstrated that the complicated mechanical properties were beyond the ability of the UVC model. In contrast, the proposed model precisely predicted both stress evolution and the hysteretic loop shape change of S31608 under various loading schemes, achieving a narrow error band within ± 8 %.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109290"},"PeriodicalIF":6.8,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermomechanical fatigue assessment of inclined film cooling holes in nickel-base single-crystal alloys","authors":"Huanbo Weng ,&nbsp;Cheng Luo ,&nbsp;Huang Yuan","doi":"10.1016/j.ijfatigue.2025.109292","DOIUrl":"10.1016/j.ijfatigue.2025.109292","url":null,"abstract":"<div><div>As advanced aero-engines demand higher turbine inlet temperatures, turbine blades are subjected to increasingly severe thermomechanical conditions, where thermomechanical fatigue (TMF) emerges as a critical failure mode for hot-end components. This study investigates isothermal fatigue (IF) and TMF behaviors of nickel-base single-crystal superalloy structures featuring inclined film cooling holes (FCHs). In IF tests, cracks initiate in Mode I, with subsequent propagation exhibiting a competitive mechanism between Mode I and the hole-path direction under varying stress levels. In TMF tests, stress concentration at FCH edges mitigates interactions among fatigue, creep, and oxidation, rendering fatigue damage the dominant factor in FCH-TMF failure. The stress ratio and concentration effects further modify the out-of-phase TMF mechanism. A non-local life prediction model is developed based on the crystal slip mechanism and critical distance theory, yielding predictions within a threefold scatter band for most specimens. However, significant deviations occur when stress gradients around the critical region of the test specimens are not adequately captured. This work provides novel insights for the structural integrity design of components operating under thermomechanical fatigue conditions.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109292"},"PeriodicalIF":6.8,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elevated-temperature fatigue behavior and microstructure based cumulative damage evaluation of additive manufacturing superalloy under variable amplitude loading","authors":"Chuanwen Sun, Wei Li, Ahmad Serjouei, Cheng Li, Rui Sun, Ibrahim Elbugdady, Yuzhe Jin","doi":"10.1016/j.ijfatigue.2025.109305","DOIUrl":"https://doi.org/10.1016/j.ijfatigue.2025.109305","url":null,"abstract":"Fatigue properties under service conditions are a critical barrier to the reliable application of additive manufacturing (AM) metals. Yet, the associated damage mechanisms and life evaluation approaches, particularly at long term, elevated temperature and variable amplitude (VA) loading, are almost unclear. To address these, high and very-high cycle fatigue VA tests and meso-microscale analyses were performed to investigate damage mechanism of a laser powder bed fused superalloy with heat treatment at service temperature of 650 °C, and a microstructure based cumulative damage evaluation approach was proposed. Results show that interior failures characterized by defect-assisted faceted cracking are predominant. VA loading tends to sequentially activate multiple defects, resulting in competitive multi-site crack nucleation. Increased stress levels accelerate crack growth, leading to the formation of localized rough growth areas and crack deflection. Both primary and secondary cracks grow transgranularly, with crack paths showing negligible dependence on grain orientation. The interior crack nucleation and growth mechanisms under VA loading are elucidated. A cumulative damage evaluation model incorporating the remaining life factor, correlation function transformation, and a reconstructed stress-life relationship was developed, with the prediction results being in close accord with the experimental data under VA loading. These findings provide new insights into the interior crack nucleation and growth mechanisms in AM superalloys and offer a predictive framework for fatigue life estimation under realistic service conditions.","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"61 1","pages":""},"PeriodicalIF":6.0,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrosion fatigue behavior and mechanism of Mg-Zn-Zr-Nd alloy in protein-containing simulated body fluid","authors":"Jinjin Liu ,&nbsp;Hongyan Tang ,&nbsp;Lili Tan ,&nbsp;Qiang Wang ,&nbsp;Song Zhang ,&nbsp;Jia Ma","doi":"10.1016/j.ijfatigue.2025.109303","DOIUrl":"10.1016/j.ijfatigue.2025.109303","url":null,"abstract":"<div><div>Corrosion fatigue failure caused by the combined influences of cyclic stress and body fluids greatly limits the clinical applications of Mg alloys. Consequently, understanding the corrosion-fatigue behavior of these materials in protein environments is crucial. This study aims to investigate the corrosion fatigue (CF) behavior of Mg-Zn-Zr-Nd alloys in different protein concentration environments (20 g/L and 40 g/L). Static corrosion tests were performed to assess the effects of protein concentration on pit formation and early-stage damage of the alloy. The results indicated that the corrosion susceptibility of the Mg alloy exhibited a marked increase with higher concentrations of BSA. Fractographic analysis reveals that fatigue cracks originated from microcracks in the air, while in the protein-containing environment, cracks initiated from both microcracks and corrosion pits. The fatigue limit (σ_f) of the samples in HBSS was significantly higher than that in HBSS containing BSA. This phenomenon is attributed to the chelation of metal cations by amino acids in BSA, which interferes with the formation of the Ca-P protective layer, thus accelerating the fatigue damage process.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109303"},"PeriodicalIF":6.8,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of laser energy density on the low cycle fatigue behavior for laser powder bed fused tantalum","authors":"Rongzheng Huang ,&nbsp;Wenling Shi ,&nbsp;Kuixue Xu ,&nbsp;Rong Wang ,&nbsp;Xiang Chen ,&nbsp;Haiqiong Xie ,&nbsp;Kai Wei","doi":"10.1016/j.ijfatigue.2025.109301","DOIUrl":"10.1016/j.ijfatigue.2025.109301","url":null,"abstract":"<div><div>Laser powder bed fused tantalum (LPBF-Ta) holds significant potential for applications in orthopedic implants and aerospace industries. However, the risk of low-cycle fatigue (LCF) failure remains a critical challenge that has yet to be adequately addressed. This study is the first to elucidate the effects of varying laser energy densities on the microstructure and defects of LPBF-Ta, as well as their crucial influence on its fatigue life response and failure mechanisms. Specifically, the findings demonstrate that optimizing laser energy density can effectively control microstructure and defect morphology, significantly enhancing the LCF life of LPBF-Ta. High initial dislocation densities at low-angle grain boundaries and lack-of-fusion (LOF) pores preferentially drive crack nucleation and propagation under cyclic loading, representing potential factors for fatigue performance degradation. In contrast to randomly distributed LOF pores formed under insufficient low laser energy density, LOF pores, induced by spatter under high laser energy density, are linearly distributed along the building direction, forming vertically aligned pore chains. Additionally, the spatter enriched with carbon and oxygen elements destabilizes interlayer bonding, causing localized embrittlement and detrimentally reducing the fatigue life. These findings and insights provide critical references for understanding the LCF behavior of LPBF-Ta and ensuring its safe engineering application design.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109301"},"PeriodicalIF":6.8,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and microstructure-sensitive fatigue modeling of the effects of periodic dwell and overload on additively manufactured Ti-6Al-4V","authors":"Harshit Gaddam,&nbsp;Taylor A. Hodes,&nbsp;Krzysztof S. Stopka,&nbsp;Michael D. Sangid","doi":"10.1016/j.ijfatigue.2025.109299","DOIUrl":"10.1016/j.ijfatigue.2025.109299","url":null,"abstract":"<div><div>Traditional microstructure-sensitive fatigue life prediction studies to date have focused on constant amplitude loading (CAL), while most real-world service conditions often involve variable amplitude loading (VAL). To address this limitation, the present study investigates the fatigue response of Ti-6Al-4V produced via laser powder bed fusion under two representative VAL conditions, i.e., periodic dwell holds and periodic overloads. Given the growing adoption of additive manufacturing techniques and the susceptibility of Ti-6Al-4V to cold dwell fatigue, this alloy provides a platform for studying microstructure-sensitive fatigue behavior under a wider range of loading conditions. Initially, experimental fatigue tests were conducted on specimens subjected to CAL, periodic dwell holds, and periodic overloads to quantify the impact of these VAL events. The results revealed that periodic dwell caused a reduction in life compared to CAL, whereas no significant decrease in life was observed in the case of periodic overload. Further, crystal plasticity finite element modeling was performed on statistically equivalent virtual microstructures with explicitly modeled prior <span><math><mi>β</mi></math></span> grain boundaries, to provide insights into the mechanism behind the experimentally observed differences in damage. The evolution of slip system activity following the application of the VAL events was found to govern the difference in fatigue life and also the resulting accumulated plastic strain energy density, which is used as a damage metric in this study. The microstructure-sensitive modeling provided an agreement with the experimentally observed fatigue trends and a mechanistic understanding of the underlying deformation mechanics leading to fatigue damage.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109299"},"PeriodicalIF":6.8,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physics-informed machine learning for high-cycle fatigue of AM Ti6Al4V: Life prediction and correlation analysis","authors":"Susong Yang ,&nbsp;Zhenhua Zhang ,&nbsp;Ran Guo ,&nbsp;Zhixin Zhan","doi":"10.1016/j.ijfatigue.2025.109296","DOIUrl":"10.1016/j.ijfatigue.2025.109296","url":null,"abstract":"<div><div>The process-structure–property (PSP) relationship in additive manufacturing (AM) has always being a significant topic, directly governing material optimization and reliable performance prediction. To address this challenge, this paper proposes a novel neuro-Basquin PDE constrained network for life prediction and correlation analysis of AM Ti-6Al-4V. The proposed neural network architecture is fundamentally based on the Basquin equation, yet exhibits nonlinear descriptive capabilities that significantly surpass the original equation, while further incorporating partial differential equation-based constraints into the loss function to guide model training. An inverse configuration that takes life as the input and stress as the output is adopted, ensuring good convergence of the model while accurately describing the fatigue limit of the data. To address parameter incompleteness in some datasets, an XGBoost-based imputation strategy was proposed. The results show that the proposed model can predict fatigue strength and fatigue life very well and has excellent generalization performance.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109296"},"PeriodicalIF":6.8,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling procedure for the damage-accumulation mode of fatigue crack growth: A case study on cold-rolled SUS430 sheet under cyclic pure shear stress","authors":"Shigeru Hamada ,&nbsp;Yamato Araki ,&nbsp;Hiroshi Noguchi","doi":"10.1016/j.ijfatigue.2025.109297","DOIUrl":"10.1016/j.ijfatigue.2025.109297","url":null,"abstract":"<div><div>Mechanical modeling for fatigue crack extension mechanisms can be categorized into three types: Plastic Deformation mode of Fatigue Crack Growth (PD-FCG), Damage Accumulation mode of Fatigue Crack Growth (DA-FCG), and Damage Accumulation mode of Fatigue Crack Propagation (DA-FCP). The modeling based on these mechanisms allow for more rational fatigue design than conventional fracture mechanics-based methods without considering the mechanism. However, although some mechanisms have been already proposed, such methods have been proposed only for PD-FCG. This study focuses on DA-FCG, which is influenced by microstructural effects. Fatigue tests were combined with digital image correlation (DIC) analysis to evaluate localized shear plastic strain. A parameter, <span><math><mover><mrow><mi>Δ</mi><msub><mi>γ</mi><mrow><mi>xy</mi><mo>,</mo><mi>D</mi><mi>I</mi><mi>C</mi></mrow></msub></mrow><mrow><mo>¯</mo></mrow></mover></math></span>, was introduced as the mechanical driving force for DA-FCG crack growth by averaging <span><math><mrow><mi>Δ</mi><msub><mi>γ</mi><mrow><mi>xy</mi></mrow></msub></mrow></math></span> over the plastic zone estimated via continuum mechanics. Furthermore, the Taylor factor <em>M</em>_τ of the shear load—a material index representing resistance to crack growth along shear-driven paths—was introduced. Moreover <span><math><mover><mrow><mi>Δ</mi><msub><mi>γ</mi><mrow><mi>xy</mi><mo>,</mo><mi>F</mi><mi>E</mi><mi>M</mi></mrow></msub></mrow><mrow><mo>¯</mo></mrow></mover></math></span> obtained from EP-FEM and <em>M</em>_τ controlled <span><math><mover><mrow><mi>Δ</mi><msub><mi>γ</mi><mrow><mi>xy</mi><mo>,</mo><mi>D</mi><mi>I</mi><mi>C</mi></mrow></msub></mrow><mrow><mo>¯</mo></mrow></mover></math></span> obtained from DIC were introduced. A correlation between <em>M</em>τ and <span><math><mover><mrow><mi>Δ</mi><msub><mi>γ</mi><mrow><mi>xy</mi><mo>,</mo><mi>D</mi><mi>I</mi><mi>C</mi></mrow></msub></mrow><mrow><mo>¯</mo></mrow></mover></math></span> was confirmed, indicating their relevance as material properties. Based on these findings, a method for predicting DA-FCG behavior using <span><math><mover><mrow><mi>Δ</mi><msub><mi>γ</mi><mrow><mi>xy</mi><mo>,</mo><mi>F</mi><mi>E</mi><mi>M</mi></mrow></msub></mrow><mrow><mo>¯</mo></mrow></mover></math></span> and <em>M</em>_τ was proposed, offering a framework for microstructure-informed fatigue strength prediction.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109297"},"PeriodicalIF":6.8,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental study on fatigue properties and fracture characteristics of sandstone under different cycle times and frequencies conditions","authors":"Sheng-Qi Yang ,&nbsp;Ke-Sheng Li ,&nbsp;Peng-Fei Yin","doi":"10.1016/j.ijfatigue.2025.109293","DOIUrl":"10.1016/j.ijfatigue.2025.109293","url":null,"abstract":"<div><div>Many underground engineering activities (e.g., drilling, tunnel excavation, vehicle loading, hydraulic fracturing, compressed air energy storage) generate dynamic disturbances, producing seismic waves or periodic cyclic loads, causing instability and failure of underground rock masses under the influence of fatigue loading. This paper focuses on the mechanical behavior of sandstone specimens under fatigue loading. Triaxial fatigue mechanical tests under multi-stage incremental cyclic loading were conducted under different cycle numbers, loading frequencies, and frequency sequences. The influence of the aforementioned factors on the strength and deformation characteristics, energy evolution, and macroscopic failure modes of sandstone specimens were systematically analyzed, revealing the fatigue <em>meso</em>-microscopic failure characteristics of sandstone under multi-stage incremental cyclic loading. The research results show that: as the number of cycles in the fatigue loading stage increases, the strength of sandstone specimens exhibits a three-stage change of “decrease-stabilize-decrease”, with both crack size and number increasing, and intergranular cracks being dominant at the specimen failure fracture surface. As the loading frequency increases, the fatigue life and internal strain energy of sandstone increase, the volume and complexity of internal cracks increase, and the proportion of transgranular cracks at the fracture surface increases. The loading frequency sequence has no significant effect on specimen strength and energy evolution. Under sequential frequency conditions, sandstone exhibits higher crack volume and a more complex crack system, with an increase in the scale of intergranular cracks at the fracture surface.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109293"},"PeriodicalIF":6.8,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}