CIRP Journal of Manufacturing Science and Technology最新文献

{"title":"Development and validation of theoretical model for nanofluid minimal quantity lubrication selection in aviation difficult-to-machine materials","authors":"Ben Wang ,&nbsp;Qi Zhang ,&nbsp;Chang Song ,&nbsp;Hao Wang ,&nbsp;Tianlong Zhu","doi":"10.1016/j.cirpj.2025.09.003","DOIUrl":"10.1016/j.cirpj.2025.09.003","url":null,"abstract":"<div><div>Difficult-to-machine aeronautical materials like ceramic matrix composites exhibit high strength and complex machinability, leading to high cutting forces, temperatures, and poor surface quality. Nanofluid minimum quantity lubrication (NMQL) offers excellent friction-reduction and heat-transfer performance, but nanofluid parameter selection remains empirical, lacking theoretical support, which limits its broader engineering application. Accordingly, a theoretical model for nanofluid selection was established by comprehensively considering tribological characteristics, thermophysical properties, dispersion stability, particle concentration, and material compatibility, and was solved using a multi-objective particle swarm optimization algorithm. The input parameters of the model include the physical properties and interfacial behavior characteristics of various base oils and nanoparticles, while the output is the optimal NMQL combination scheme. Results showed that, when applied to 2.5D SiC_f/SiC composites, the optimal solution determined and experimentally validated was palm oil-carbon nanotubes (CNTs)-vol. 2 %. In terms of machining performance, compared with dry grinding (DG), the grinding force under NMQL-CNTs-2 % condition decreased by up to 75.2 %, and the surface roughness decreased by 41.81 %. Meanwhile, the number of rough fracture surfaces was minimized, and fiber wear was minimal, indicating the high accuracy of the optimal solution. In addition, validation was performed using experimental data from existing studies on Ti6Al4V titanium alloy, GH4169 alloy, carbon fiber reinforced polymer (CFRP) composites, and quartz fiber reinforced polyimide (QFRP) composites. The predicted results from the model were consistent with the experimental findings, further demonstrating its applicability and generalizability. The study effectively guides nanofluid selection while providing theoretical support for high-efficiency, precision machining of aeronautical difficult-to-machine materials.</div></div>","PeriodicalId":56011,"journal":{"name":"CIRP Journal of Manufacturing Science and Technology","volume":"63 ","pages":"Pages 12-27"},"PeriodicalIF":5.4,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crack elimination and synergistic improvement of strength and ductility in directed energy deposited IN738 superalloy via substrate heating and heat treatment","authors":"Mingzhang Chen ,&nbsp;Lin Hua ,&nbsp;Zeqi Hu ,&nbsp;Xunchen Liu ,&nbsp;Xunpeng Qin","doi":"10.1016/j.cirpj.2025.08.009","DOIUrl":"10.1016/j.cirpj.2025.08.009","url":null,"abstract":"<div><div>During the directed energy deposition (DED) process of IN738 superalloy, elevated thermal stresses and low-ductility γ′ phase can lead to crack formation. To tackle the cracking issue, this study developed a substrate heating platform within the DED apparatus, raising the substrate temperature to 300 °C to diminish the temperature gradient and thermal stress, while also optimizing laser power and scanning speed to achieve DED crack-free IN738. On-site thermal imaging and numerical simulations indicated that the temperature gradient and thermal stress in the samples gradually diminished with rising substrate temperatures and optimized process parameters. Moreover, microstructural characterization results revealed that heating the substrate to 300 °C reduced the content of the γ′ phase, while optimizing process parameters further refined the grains. The combination of reduced thermal stress, grain refinement, and diminished γ′ phase volume fraction collectively enabled the DED of crack-free IN738. On the crack-free DED IN738, a solution treatment at 1120°C for two hours notably improved its mechanical properties. The solution treatment simultaneously eliminated the Laves phase and generated finer γ′ phases along with a bimodal structure. These strengthening mechanisms effectively enhanced strength and ductility. Digital image correlation (DIC) and fractographic analyses substantiated that the solution treatment improved the coordinated deformation ability and the solubility of certain carbides reduced defects, further enhancing strength and ductility. Interestingly, a subsequent 24-hour aging treatment at 850°C did not significantly improve properties due to γ′ phase coarsening and δ phase precipitation.</div></div>","PeriodicalId":56011,"journal":{"name":"CIRP Journal of Manufacturing Science and Technology","volume":"62 ","pages":"Pages 59-74"},"PeriodicalIF":5.4,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144932735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analytical prediction of surface morphology and residual stress induced by milling and ultrasonic surface rolling","authors":"Junfeng Xiang ,&nbsp;Aobo Song ,&nbsp;Haojie Ding ,&nbsp;Xiangping Zou ,&nbsp;Lijing Xie ,&nbsp;Jie Yi ,&nbsp;Dong Han","doi":"10.1016/j.cirpj.2025.08.005","DOIUrl":"10.1016/j.cirpj.2025.08.005","url":null,"abstract":"<div><div>Shape-controlled milling and integrity-controlled ultrasonic surface rolling processing (USRP) is an effective sequential machining method that enhances the surface integrity of metallic materials by reducing surface roughness (SR), increasing compressive residual stress (CRS), and improving fatigue resistance. However, accurately predicting the surface morphology and CRS during multi-process sequence remains a challenge. This study establishes analytical predictive models for the surface morphology and CRS of TC21 titanium alloy after milling and subsequent USRP, explicitly considering the initial surface state induced by milling. A surface morphology prediction model for USRP was then developed, incorporating the initial milled surface topography, revealing that USRP effectively eliminates surface peaks but does not fill concave valleys, necessitating the consideration of initial surface conditions for accurate predictions. By integrating milling-induced initial residual stress fields (IRSF), hardness variations, and yield strength modifications, an analytical model for CRS prediction based on Hertzian contact theory and elastoplastic deformation was formulated. The accuracy of the proposed models was verified through finite element simulation and experiment measurements. The findings highlight the necessity of incorporating initial surface integrity when modeling multi-process machining and provide a foundational approach for optimizing surface integrity in titanium alloy components.</div></div>","PeriodicalId":56011,"journal":{"name":"CIRP Journal of Manufacturing Science and Technology","volume":"62 ","pages":"Pages 38-58"},"PeriodicalIF":5.4,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of material properties in modeling maximal surface temperatures and heat distribution in milling of UD CFRP","authors":"Wolfgang Hintze,&nbsp;Ganna Shchegel,&nbsp;Jan Mehnen,&nbsp;Carsten Möller,&nbsp;Jan Dege","doi":"10.1016/j.cirpj.2025.08.002","DOIUrl":"10.1016/j.cirpj.2025.08.002","url":null,"abstract":"<div><div>In order to meet the precision requirements for components made of carbon fibre reinforced plastics (CFRP), the edges are often trimmed by milling. However, this can lead to detrimental thermal damage to the machined surface. The aim of the study was to investigate in detail the maximum temperatures and characteristic thermal parameters for various unidirectional CFRP materials under different cutting conditions. During upcut milling using a PCD cutter an infrared camera, thermocouples and a dynamometer were employed to monitor temperatures and the cutting power. An analytical heat flow model suitable for arbitrary fibre orientation angles was used to determine, based on thermal material properties, the temperature change at the machined surface and the heat flow parameters from experiments. Material influence on the cutting power was considered by its specific elastic energy at fracture depending on the volume content and mechanical properties of the fibres. At the machined surface, the resin glass transition temperatures were frequently exceeded, and the highest temperature changes were observed at a fibre orientation angle of Φ = 135°. In most cases, higher cutting speeds were accompanied by greater temperature changes. Phenomenological models of the thermal parameters of the machining process were developed, which take into account both the thermal and mechanical CFRP properties and show a good correlation with the experimental results. They provide benefits in order to predict the temperature fields for materials with differing properties and under varying cutting conditions.</div></div>","PeriodicalId":56011,"journal":{"name":"CIRP Journal of Manufacturing Science and Technology","volume":"62 ","pages":"Pages 24-37"},"PeriodicalIF":5.4,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of quasi-isothermal hot forging and isothermal roll forming on the microstructure of a wrought nickel-based superalloy","authors":"Sh.Kh. Mukhtarov,&nbsp;A.A. Ganeev,&nbsp;R.V. Shakhov,&nbsp;V.M. Imayev","doi":"10.1016/j.cirpj.2025.08.007","DOIUrl":"10.1016/j.cirpj.2025.08.007","url":null,"abstract":"<div><div>In the present work, the novel processing route including isothermal roll forming was applied for obtaining a disc workpiece intended for subsequent manufacturing of a disc, which could be used in gas turbine engines. A wrought nickel-based superalloy Ni-10.3(Al,Ti,Nb)-31.6(Co,Cr,Mo,W) (wt%) (Russian abbreviation ЭП962) was taken as a starting material. In the as-received condition, the superalloy had the microstructure with a γ grain size of about 50 µm. From the as-received superalloy the billet with a size of Ø200 × 315 mm was cut and put into a can made of a stainless steel. The canned billet was subjected to three-stage subsolvus forging under quasi-isothermal conditions with intermediate annealing. As a result, the pancake with a size of about Ø410 × 75 mm was produced. Microstructural examination showed that predominantly recrystallized and fine-grained structure (d&lt;10 µm) was formed in the central part of the pancake, while coarser microstructure was preserved near the flat surfaces of the pancake. Before roll forming, the central part of the pancake with a diameter of 70 mm was cut out and used to make small cylindrical samples, which were compressed at 1100°C with switching of the strain rate to determine the strain rate sensitivity coefficient m and thus the superplastic conditions. The obtained workpiece was then subjected to isothermal subsolvus roll forming under near superplastic conditions at T = 1100 ± 15°C and έ= 5 × 10⁻⁴-5 × 10⁻³ s⁻¹. Complex-shaped disc workpiece with a size of about Ø510 × (35−70) mm was produced. Microstructural analysis of the produced disc workpiece showed that recrystallized and gradient microstructure was formed after roll forming. The average γ grain sizes changed from d≈ 9.7 µm in the bore zone to d≈ 8.8 µm in the web zone and to d≈ 20 µm in the rim zone of the disc workpiece. The advantages of using this processing to manufacture near-net shaped discs for gas turbine engines are discussed.</div></div>","PeriodicalId":56011,"journal":{"name":"CIRP Journal of Manufacturing Science and Technology","volume":"62 ","pages":"Pages 16-23"},"PeriodicalIF":5.4,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144889308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tool trajectory planning with inter-path consistency of feedrate for freeform surface machining","authors":"Shu Wang ,&nbsp;Hui Zhang ,&nbsp;Bingran Li ,&nbsp;Peiqing Ye","doi":"10.1016/j.cirpj.2025.08.003","DOIUrl":"10.1016/j.cirpj.2025.08.003","url":null,"abstract":"<div><div>For CNC machining of freeform surfaces, inter-path inconsistency of feedrate for tool trajectories can lead to surface defects such as overcutting, undercutting, and uneven tool marks, significantly affecting the surface quality of workpieces. However, existing tool trajectory planning methods typically focus only on motion planning for a single toolpath in the feed direction while neglecting the toolpath reference information in the cross-feed direction, which limits the potential improvement in machining quality. To address this issue, a tool trajectory planning method with inter-path consistency of feedrate is proposed in this paper, which includes an inter-path mapping and consistent redistribution algorithm for tool position points, as well as a feedrate planning algorithm based on interpolation between sub-toolpaths. By referring to the position and feedrate information of adjacent sub-toolpaths, the proposed method can achieve a more uniform feedrate distribution in the cross-feed direction. Additionally, to evaluate the effectiveness of the proposed method in optimizing inter-path consistency of feedrate, two evaluation indicators, inter-path feedrate distribution cosine similarity and feedrate gradient in cross-feed direction, are introduced. Simulation and experimental results demonstrate the feasibility and effectiveness of the proposed method, showing that it can significantly improve inter-path consistency of feedrate compared to conventional methods, and finally enhance surface quality and machining efficiency.</div></div>","PeriodicalId":56011,"journal":{"name":"CIRP Journal of Manufacturing Science and Technology","volume":"62 ","pages":"Pages 1-15"},"PeriodicalIF":5.4,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144831479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unraveling stress inheritance and distribution mechanisms in the multi-stage processing of 2219 aluminum alloy tanks","authors":"Shulin Lu ,&nbsp;Jianfeng Wang ,&nbsp;Lihong Cheng ,&nbsp;Yuhang Duan ,&nbsp;Yaobang Zhao ,&nbsp;Caiyuan Lin ,&nbsp;Junchen Li ,&nbsp;Xiaohong Zhan","doi":"10.1016/j.cirpj.2025.07.011","DOIUrl":"10.1016/j.cirpj.2025.07.011","url":null,"abstract":"<div><div>Controlling residual stress during the multi-stage processing of rocket tanks is pivotal to ensuring the safety and longevity of reusable launch vehicles(RLVs). This study established a multi-stage processing model to simulate the continuous fabrication of the tank, validated experimentally for accuracy. By integrating stress zoning with predefined fields, stress inheritance across processing stages was achieved, facilitating a detailed analysis of stress redistribution and inheritance throughout the tank’s continuous processing. The results reveal that under multi-stage processing, the peak stress in the spun tank bottom undergoes an \"increase-decrease-increase\" pattern. Following heat treatment, the stress distribution becomes uniform, whereas after welding, stress concentration emerges at the edges and the dome region, reaching a peak stress of 112.7 MPa. For the barrel segment, the overall peak stress follows an \"increase-decrease\" trend. After roll bending (RB), a high stress zone appears in the middle of the wall panel. After friction stir welding (FSW) of the longitudinal weld, stress concentration occurs at the weld seam, with annular high stress zones forming at both ends. Upon completion of the FSW of the girth weld, thermomechanical effects alleviate the initial stress concentration areas, which gradually shift to the girth weld and adjacent regions. Throughout the multi-stage processing, the peak stress rises from 43.8 MPa to 126.3 MPa. To regulate the tank’s residual stress, orthogonal experiments were utilized to optimize welding parameters, resulting in a 20.8 % reduction in peak stress. These findings provide theoretical support for optimizing the manufacturing process of RLVs.</div></div>","PeriodicalId":56011,"journal":{"name":"CIRP Journal of Manufacturing Science and Technology","volume":"61 ","pages":"Pages 524-541"},"PeriodicalIF":5.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of the wall thickness effect on the solidification and mechanical properties of thin-walled SS316L built via LPBF additive manufacturing","authors":"Meysam Norouzi-Inallu ,&nbsp;Ilkka Poutiainen ,&nbsp;Kari Ullakko","doi":"10.1016/j.cirpj.2025.07.008","DOIUrl":"10.1016/j.cirpj.2025.07.008","url":null,"abstract":"<div><div>This study examines the fabrication of 316 L stainless steel (SS316L) thin-walled structures using the laser powder bed fusion (LPBF) process, with a focus on the influence of wall thickness and post-processing heat treatment on microstructural evolution and mechanical properties. As-built samples exhibited consistent epitaxial growth of the columnar grain structures aligned with the build direction in narrow dimensions. Thinner samples (0.6 mm wall thickness) showed more significant heat accumulation and slower cooling rates than thicker samples (1.0 mm wall thickness), with the former exhibiting substantial longitudinal grain growth, reduced residual stress, and lower tensile strength. Additionally, the thinner samples developed a stronger &lt; 111 &gt; texture, aligning with the build direction, which contributed to a decrease in microhardness and dislocation density. The high-temperature homogenization treatments refined the microstructure, leading to oriented coarse-grain structures with distinct crystallographic orientations. The post-processing reduced the microhardness by 36.60 % for the thicker sample and 19.83 % for the thinner sample. Furthermore, mechanical properties such as strength, hardness, ductility, and microhardness were closely linked to the observed crystallographic and grain structures. These findings highlight the significant impact of sample thickness, thermal history, and post-processing on the structural and mechanical properties of SS316L components manufactured using LPBF.</div></div>","PeriodicalId":56011,"journal":{"name":"CIRP Journal of Manufacturing Science and Technology","volume":"61 ","pages":"Pages 542-553"},"PeriodicalIF":5.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144781000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Model-free optimal spindle speed control for real-time vibration mitigation in milling","authors":"Kaan Bahtiyar,&nbsp;Burak Sencer","doi":"10.1016/j.cirpj.2025.07.010","DOIUrl":"10.1016/j.cirpj.2025.07.010","url":null,"abstract":"<div><div>Thanks to its high productivity, milling is a key subtractive process in modern metals manufacturing. Nevertheless, like other machining processes, it suffers from vibrations appearing in the form of forced and self-excited chatter. These vibrations deteriorate the surface finish quality, shorten tool life, and damage the machine components, limiting the attainable productivity. This paper presents a model-free adaptive spindle speed regulation strategy that aims to minimize overall machining vibrations in milling. The presented spindle-speed adaptation strategy is based on the model-free extremum seeking control (ESC) framework that searches the parameter space to minimize a desired cost function. The cost function is designed to penalize overall machining vibrations in the time-domain, and its gradient (search direction) is determined data-based by making use of the vibratory data collected during the machining operation. The stability of the proposed algorithm and its tuning guidance is provided to the end-users. The effectiveness of the proposed controller on minimizing overall machining vibrations is demonstrated in simulations and validated in machining tests. Results demonstrate significant reduction in RMS vibration level and lowered surface location errors (SLE) as compared to the conventional approach.</div></div>","PeriodicalId":56011,"journal":{"name":"CIRP Journal of Manufacturing Science and Technology","volume":"61 ","pages":"Pages 554-571"},"PeriodicalIF":5.4,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144781001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A real-time interpolation algorithm for five-axis linear toolpaths with convolution-based local smoothing considering consecutive short segments","authors":"Fei Lou ,&nbsp;Hengbo Li ,&nbsp;Yijie Wu","doi":"10.1016/j.cirpj.2025.07.009","DOIUrl":"10.1016/j.cirpj.2025.07.009","url":null,"abstract":"<div><div>Local smoothing stands as the most prevalent technique for optimizing linear toolpaths in CNC machining. Nevertheless, its performance deteriorates markedly when applied to consecutive short segments, severely impacting machining efficiency. This paper proposes a real-time local smoothing and interpolation algorithm, in which a post-processing toolpath smoothing based on a second-order sliding convolution window is implemented to achieve <span><math><msup><mrow><mi>C</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> continuity of the interpolated path while simultaneously satisfying constraints of tool tip and rotation smoothing errors. For consecutive short linear segments, convolution-based smoothing enables cross-segment optimization with enhanced geometric consistency, whereas linear regions in long segments are preserved which do not require an additional establishment of synchronization with the smooth region. Preceding the smoothing process, the jerk-limited feedrate scheduling operates at the level of primitive linear segments as the sole minimal unit, thereby circumventing challenges inherent in blended-path (linear and spline segments) interpolation. With adhering to the geometric constraints of the trajectory profile and the machine tool’s kinematic capabilities, this algorithm effectively enhances the scheduled feedrate by identifying the motion-limited axis of each segment. The effectiveness of the proposed algorithm is verified through simulations and experiments.</div></div>","PeriodicalId":56011,"journal":{"name":"CIRP Journal of Manufacturing Science and Technology","volume":"61 ","pages":"Pages 513-523"},"PeriodicalIF":5.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}