Chinese Journal of Aeronautics最新文献_第3页

Multi-scale analyses of phase transformation mechanisms and hardness in linear friction welded Ti17(α + β)/Ti17(β) dissimilar titanium alloy joint Ti17(α+β)/Ti17(β)异种钛合金线摩擦焊接接头相变机理及硬度的多尺度分析

IF 5.7 1区工程技术

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI: 10.1016/j.cja.2023.08.018

Zhenguo GUO , Tiejun MA , Xiawei YANG , Ju LI , Wenya LI , Achilles VAIRIS

{"title":"Multi-scale analyses of phase transformation mechanisms and hardness in linear friction welded Ti17(α + β)/Ti17(β) dissimilar titanium alloy joint","authors":"Zhenguo GUO , Tiejun MA , Xiawei YANG , Ju LI , Wenya LI , Achilles VAIRIS","doi":"10.1016/j.cja.2023.08.018","DOIUrl":"10.1016/j.cja.2023.08.018","url":null,"abstract":"<div><p>The Ti17(α + β)-Ti17(β) dual alloy-dual property blisk produced using Linear Friction Welding (LFW) is considered as high-performance component in advanced aeroengine. However, up to now, microstructure evolution and relationship between microstructure and micro mechanical properties of LFWed Ti17(α + β)/Ti17(β) dissimilar joint have not been thoroughly revealed. In this work, complex analyses of the phase transformation mechanisms of the joint are conducted, and phase transformations in individual zones are correlated to their microhardness and nanohardness. Results reveal that α dissolution occurs under high temperatures encountered during LFW, which reduces microhardness of the joint to that of Ti17(α + β) and Ti17(β). In Thermo-Mechanically Affected Zone of Ti17(α + β) (TMAZ-(α + β)) side joint, a large number of nanocrystalline α phases form with different orientations. This microstructure strengthens significantly by fine grains which balances partial softening effect of α dissolution, and increases nanohardness of α phase and microhardness of TMAZ-(α + β). Superlattice metastable β phase precipitates from metastable β in Weld Zone (WZ) during quick cooling following welding, because of short-range diffusion migration of solute atoms, especially β stabilizing elements Mo and Cr. The precipitation of the superlattice metastable β phase results in precipitation strengthening, which in turn increases nanohardness of metastable β and microhardness in WZ.</p></div>","PeriodicalId":55631,"journal":{"name":"Chinese Journal of Aeronautics","volume":"37 1","pages":"Pages 312-324"},"PeriodicalIF":5.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1000936123002984/pdfft?md5=9c590e129793acb23ffb8c6d751dec1f&pid=1-s2.0-S1000936123002984-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48556715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aeroengine thrust estimation and embedded verification based on improved temporal convolutional network 基于改进时间卷积网络的航空发动机推力估计与嵌入式验证

IF 5.7 1区工程技术

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI: 10.1016/j.cja.2023.09.001

Wanzhi MENG, Zhuorui PAN, Sixin WEN, Pan QIN, Ximing SUN

{"title":"Aeroengine thrust estimation and embedded verification based on improved temporal convolutional network","authors":"Wanzhi MENG, Zhuorui PAN, Sixin WEN, Pan QIN, Ximing SUN","doi":"10.1016/j.cja.2023.09.001","DOIUrl":"10.1016/j.cja.2023.09.001","url":null,"abstract":"<div><p>Thrust estimation is a significant part of aeroengine thrust control systems. The traditional estimation methods are either low in accuracy or large in computation. To further improve the estimation effect, a thrust estimator based on Multi-layer Residual Temporal Convolutional Network (M-RTCN) is proposed. To solve the problem of dead Rectified Linear Unit (ReLU), the proposed method uses the Gaussian Error Linear Unit (GELU) activation function instead of ReLU in residual block. Then the overall architecture of the multi-layer convolutional network is adjusted by using residual connections, so that the network thrust estimation effect and memory consumption are further improved. Moreover, the comparison with seven other methods shows that the proposed method has the advantages of higher estimation accuracy and faster convergence speed. Furthermore, six neural network models are deployed in the embedded controller of the micro-turbojet engine. The Hardware-in-the-Loop (HIL) testing results demonstrate the superiority of M-RTCN in terms of estimation accuracy, memory occupation and running time. Finally, an ignition verification is conducted to confirm the expected thrust estimation and real-time performance.</p></div>","PeriodicalId":55631,"journal":{"name":"Chinese Journal of Aeronautics","volume":"37 1","pages":"Pages 106-117"},"PeriodicalIF":5.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1000936123003059/pdfft?md5=4b260ee034d01ba5ce5d294679f15fe6&pid=1-s2.0-S1000936123003059-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46696473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A reduced-order model for fast predicting ionized flows of hypersonic vehicles along flight trajectory 用于快速预测高超音速飞行器沿飞行轨迹电离流的降阶模型

IF 5.7 1区工程技术

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI: 10.1016/j.cja.2023.09.007

Jingchao ZHANG , Chunsheng NIE , Jinsheng CAI , Shucheng PAN

{"title":"A reduced-order model for fast predicting ionized flows of hypersonic vehicles along flight trajectory","authors":"Jingchao ZHANG , Chunsheng NIE , Jinsheng CAI , Shucheng PAN","doi":"10.1016/j.cja.2023.09.007","DOIUrl":"10.1016/j.cja.2023.09.007","url":null,"abstract":"<div><p>An improved Reduced-Order Model (ROM) is proposed based on a flow-solution preprocessing operation and a fast sampling strategy to efficiently and accurately predict ionized hypersonic flows. This ROM is generated in low-dimensional space by performing the Proper Orthogonal Decomposition (POD) on snapshots and is coupled with the Radial Basis Function (RBF) to achieve fast prediction speed. However, due to the disparate scales in the ionized flow field, the conventional ROM usually generates spurious negative errors. Here, this issue is addressed by performing flow-solution preprocessing in logarithmic space to improve the conventional ROM. Then, extra orthogonal polynomials are introduced in the RBF interpolation to achieve additional improvement of the prediction accuracy. In addition, to construct high-efficiency snapshots, a trajectory-constrained adaptive sampling strategy based on convex hull optimization is developed. To evaluate the performance of the proposed fast prediction method, two hypersonic vehicles with classic configurations, i.e. a wave-rider and a reentry capsule, are used to validate the proposed method. Both two cases show that the proposed fast prediction method has high accuracy near the vehicle surface and the free-stream region where the flow field is smooth. Compared with the conventional ROM prediction, the prediction results are significantly improved by the proposed method around the discontinuities, e.g. the shock wave and the ionized layer. As a result, the proposed fast prediction method reduces the error of the conventional ROM by at least 45%, with a speedup of approximately 2.0 × 10<sup>5</sup> compared to the Computational Fluid Dynamic (CFD) simulations. These test cases demonstrate that the method developed here is efficient and accurate for predicting ionized hypersonic flows.</p></div>","PeriodicalId":55631,"journal":{"name":"Chinese Journal of Aeronautics","volume":"37 1","pages":"Pages 89-105"},"PeriodicalIF":5.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1000936123003114/pdfft?md5=3a328f4f544c5710202d94bb2e3c66fb&pid=1-s2.0-S1000936123003114-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135298558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Method for passivation of propellant residues in orbital stage tank of launch vehicle 运载火箭轨道级燃料箱中推进剂残留物的钝化方法

IF 5.7 1区工程技术

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI: 10.1016/j.cja.2023.09.018

Valeriy TRUSHLYAKOV , Ivan LESNYAK , Alexey PANICHKIN

{"title":"Method for passivation of propellant residues in orbital stage tank of launch vehicle","authors":"Valeriy TRUSHLYAKOV , Ivan LESNYAK , Alexey PANICHKIN","doi":"10.1016/j.cja.2023.09.018","DOIUrl":"10.1016/j.cja.2023.09.018","url":null,"abstract":"<div><p>The problem of removing unused liquid propellant residues from the tanks of spent spacecraft and orbital stages of Launch Vehicles (LV) leads to their explosion and the formation of space debris in orbits. To provide a solution to this problem, a method for removing liquid propellant residues from the LV tanks after the mission completion is proposed. The method is based on the gasification of liquid propellant residues in the tanks under acoustic-vacuum exposure and the discharge of the gasification products into the surrounding outer space. Experimental investigations were carried out on a Ground-based Experimental Installation (GEI) to determine the coefficient of heat transfer from the surface of an acoustic radiator to a liquid. The obtained coefficient was then used to calculate the energy costs for the gasification of kerosene. Numerical estimates are given on the example of the tank with kerosene residues from a spent second stage of the LV “Soyuz-2.1 v”. The optimal discharge rate at which kerosene does not freeze is 0.14 m<sup>3</sup>/s. Moreover, the acoustic exposure leads to an increase in the mass of evaporated kerosene over a given time by 96.1%, and the energy costs are 1756.7 kJ (approximately 50% of the remaining electrical energy).</p></div>","PeriodicalId":55631,"journal":{"name":"Chinese Journal of Aeronautics","volume":"37 1","pages":"Pages 64-76"},"PeriodicalIF":5.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1000936123003291/pdfft?md5=4d11da86a30d9286585f0a753d6d64db&pid=1-s2.0-S1000936123003291-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134915407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Technologies and studies of gas exchange in two-stroke aircraft piston engine: A review 二冲程航空活塞发动机气体交换技术与研究综述

IF 5.7 1区工程技术

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI: 10.1016/j.cja.2022.08.012

Yu ZHOU , Xueyu LI , Shuiting DING , Shuai ZHAO , Kun ZHU , Longtao SHAO , Farong DU , Gerui WANG , Zheng XU

引用次数: 5

Precision motion control for electro-hydraulic axis systems under unknown time-variant parameters and disturbances 未知时变参数和扰动下电液轴系统的精确运动控制

IF 5.7 1区工程技术

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI: 10.1016/j.cja.2023.06.001

Xiaowei YANG, Yaowen GE, Wenxiang DENG, Jianyong YAO

{"title":"Precision motion control for electro-hydraulic axis systems under unknown time-variant parameters and disturbances","authors":"Xiaowei YANG, Yaowen GE, Wenxiang DENG, Jianyong YAO","doi":"10.1016/j.cja.2023.06.001","DOIUrl":"10.1016/j.cja.2023.06.001","url":null,"abstract":"<div><p>This article focuses on asymptotic precision motion control for electro-hydraulic axis systems under unknown time-variant parameters, mismatched and matched disturbances. Different from the traditional adaptive results that are applied to dispose of unknown constant parameters only, the unique feature is that an adaptive-gain nonlinear term is introduced into the control design to handle unknown time-variant parameters. Concurrently both mismatched and matched disturbances existing in electro-hydraulic axis systems can also be addressed in this way. With skillful integration of the backstepping technique and the adaptive control, a synthesized controller framework is successfully developed for electro-hydraulic axis systems, in which the coupled interaction between parameter estimation and disturbance estimation is avoided. Accordingly, this designed controller has the capacity of low-computation costs and simpler parameter tuning when compared to the other ones that integrate the adaptive control and observer/estimator-based technique to dividually handle parameter uncertainties and disturbances. Also, a nonlinear filter is designed to eliminate the “explosion of complexity” issue existing in the classical back-stepping technique. The stability analysis uncovers that all the closed-loop signals are bounded and the asymptotic tracking performance is also assured. Finally, contrastive experiment results validate the superiority of the developed method as well.</p></div>","PeriodicalId":55631,"journal":{"name":"Chinese Journal of Aeronautics","volume":"37 1","pages":"Pages 463-471"},"PeriodicalIF":5.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1000936123001875/pdfft?md5=051c8dfc08e15727c3ac9f4927fd11c3&pid=1-s2.0-S1000936123001875-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43434709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Matched Volterra reduced-order model for an airfoil undergoing periodic translation 翼型周期平移的匹配Volterra降阶模型

IF 5.7 1区工程技术

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI: 10.1016/j.cja.2023.02.034

Lianrui NIE, Ziniu WU

{"title":"Matched Volterra reduced-order model for an airfoil undergoing periodic translation","authors":"Lianrui NIE, Ziniu WU","doi":"10.1016/j.cja.2023.02.034","DOIUrl":"10.1016/j.cja.2023.02.034","url":null,"abstract":"<div><p>This paper is devoted to application of the Reduced-Order Model (ROM) based on Volterra series to prediction of lift and drag forces due to airfoil periodic translation in transonic flow region. When there is large amplitude oscillation of the relative Mach number, as appeared in helicopter rotor movement in forward flight, the conventional Volterra ROM is found to be unsatisfactory. To cover such applications, a matched Volterra ROM, inspired from previous multistep nonlinear indicial response method based on Duhamel integration, is thus considered, in which the step motions are defined inside a number of equal intervals with both positive and negative step motions to match the airfoil forward and backward movement, and the kernel functions are constructed independently at each interval. It shows that, at least for the translation movement considered, this matched Volterra ROM greatly improves the accuracy of prediction. Moreover, the matched Volterra ROM, with the total number of step motions and thus the computational cost close to those of the conventional Volterra ROM method, has the additional advantage that the same set of kernels can match various translation motions with different starting conditions so the kernels can be predesigned without knowing the specific motion of airfoil.</p></div>","PeriodicalId":55631,"journal":{"name":"Chinese Journal of Aeronautics","volume":"37 1","pages":"Pages 19-23"},"PeriodicalIF":5.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1000936123000559/pdfft?md5=5da9373187652f983626d2790dcbf2fd&pid=1-s2.0-S1000936123000559-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48903314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cooperative game penetration guidance for multiple hypersonic vehicles under safety critical framework 安全关键框架下多高超音速飞行器的协同博弈突防制导

IF 5.7 1区工程技术

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI: 10.1016/j.cja.2023.08.023

Jieqing CHEN, Ruisheng SUN, Yu LU

{"title":"Cooperative game penetration guidance for multiple hypersonic vehicles under safety critical framework","authors":"Jieqing CHEN, Ruisheng SUN, Yu LU","doi":"10.1016/j.cja.2023.08.023","DOIUrl":"10.1016/j.cja.2023.08.023","url":null,"abstract":"<div><p>The rapid development of the anti-missile weapon technology brings new challenges to the cooperative penetration strategy solution and the guidance law design for Hypersonic Vehicles (HVs). This paper studies the coordinated game penetration guidance problem for multiple hypersonic vehicles faced with space threat areas. A scheme for seeking cooperative game penetration guidance strategy under safety critical control framework is presented. In this scheme, a multi-HV cooperative game model is proposed in a minimum optimization form which can simplify the solving process and accelerate the computing speed. Then, a second-order control barrier function is developed to transform the implicit nonlinear constraints of the proposed model into linear ones. In order to obtain better performance of guidance strategy, a composite guidance law under the safety critical control framework is presented to allocate guidance strategies appropriately in the whole process. It is shown that the proposed scheme can guarantee successful penetration while avoiding threat areas. Finally, a comparative simulation with a two-on-three game is conducted to verify the effectiveness of the proposed method.</p></div>","PeriodicalId":55631,"journal":{"name":"Chinese Journal of Aeronautics","volume":"37 1","pages":"Pages 247-255"},"PeriodicalIF":5.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1000936123003035/pdfft?md5=34aa327c6045c8b26e23592819e76460&pid=1-s2.0-S1000936123003035-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49599807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust multi-sensor image matching based on normalized self-similarity region descriptor 基于归一化自相似性区域描述符的稳健多传感器图像匹配

IF 5.7 1区工程技术

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI: 10.1016/j.cja.2023.10.003

Xuecong LIU , Xichao TENG , Jing LUO , Zhang LI , Qifeng YU , Yijie BIAN

{"title":"Robust multi-sensor image matching based on normalized self-similarity region descriptor","authors":"Xuecong LIU , Xichao TENG , Jing LUO , Zhang LI , Qifeng YU , Yijie BIAN","doi":"10.1016/j.cja.2023.10.003","DOIUrl":"10.1016/j.cja.2023.10.003","url":null,"abstract":"<div><p>Multi-modal image matching is crucial in aerospace applications because it can fully exploit the complementary and valuable information contained in the amount and diversity of remote sensing images. However, it remains a challenging task due to significant non-linear radiometric, geometric differences, and noise across different sensors. To improve the performance of heterologous image matching, this paper proposes a normalized self-similarity region descriptor to extract consistent structural information. We first construct the pointwise self-similarity region descriptor based on the Euclidean distance between adjacent image blocks to reflect the structural properties of multi-modal images. Then, a linear normalization approach is used to form Modality Independent Region Descriptor (MIRD), which can effectively distinguish structural features such as points, lines, corners, and flat between multi-modal images. To further improve the matching accuracy, the included angle cosine similarity metric is adopted to exploit the directional vector information of multi-dimensional feature descriptors. The experimental results show that the proposed MIRD has better matching accuracy and robustness for various multi-modal image matching than the state-of-the-art methods. MIRD can effectively extract consistent geometric structure features and suppress the influence of SAR speckle noise using non-local neighboring image blocks operation, effectively applied to various multi-modal image matching.</p></div>","PeriodicalId":55631,"journal":{"name":"Chinese Journal of Aeronautics","volume":"37 1","pages":"Pages 271-286"},"PeriodicalIF":5.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1000936123003473/pdfft?md5=a64f5705109bcee34e8657b32a0d680b&pid=1-s2.0-S1000936123003473-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135660806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructure, mechanical and fracture properties of friction stir welded 2195 Al-Li alloy joints 摩擦搅拌焊接 2195 Al-Li 合金接头的微观结构、机械性能和断裂性能

IF 5.7 1区工程技术

Chinese Journal of Aeronautics Pub Date : 2024-01-01 DOI: 10.1016/j.cja.2023.10.017

Guangda SUN , Weizhao SUN , Li ZHOU , Sanfeng LUO , Zili ZHANG , Debo LIU , Huiqiang WU

{"title":"Microstructure, mechanical and fracture properties of friction stir welded 2195 Al-Li alloy joints","authors":"Guangda SUN , Weizhao SUN , Li ZHOU , Sanfeng LUO , Zili ZHANG , Debo LIU , Huiqiang WU","doi":"10.1016/j.cja.2023.10.017","DOIUrl":"10.1016/j.cja.2023.10.017","url":null,"abstract":"<div><p>The 8 mm-thick 2195 Al-Li alloy joints were achieved by Friction Stir Welding (FSW). The microstructural evolution, temperature-dependent mechanical properties, and fracture properties were studied. The T<sub>1</sub>, δ′/β′ and θ′ precipitates were observed in the Base Metal (BM) and the Heat Affected Zone (HAZ). Most of the precipitates, except for re-precipitated δ′/β′ phases, were dissolved in the Nugget Zone (NZ). The tensile specimens that failed at cryogenic temperatures (–196 °C) had the maximum Ultimate Tensile Strength (UTS), and the fracture surface showed the inter-granular fracture characteristics. Compared to those at room temperature (25 °C), the decreasing tensile properties at high temperature (180 °C) were related to microstructure and strain hardening effects. The NZ presented the optimal fracture toughness, and the Crack Tip Opening Displacement (CTOD) was mutually dominated by microhardness and grain size. Analysis on Fatigue Crack Growth (FCG) rates indicates that the Thermal-Mechanically Affected Zone (TMAZ) exhibited the most superior fatigue resistance performance at stress intensity range below 17 MPa·m<sup>1/2</sup> due to compressive residual stress and the crack closure effect. The fatigue fracture surfaces reveal that the crack propagation zone was characterized by the striations and secondary cracks. Also, inter-granular fracture behavior was responsible for the fastest FCG rates in the NZ.</p></div>","PeriodicalId":55631,"journal":{"name":"Chinese Journal of Aeronautics","volume":"37 1","pages":"Pages 345-361"},"PeriodicalIF":5.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1000936123003667/pdfft?md5=38675d545e22fb55b543aff4a5c4737b&pid=1-s2.0-S1000936123003667-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136093902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0