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Fast strength-ductility synergistically adjusting of cold spray additive manufactured Cu deposits via electric pulse processing

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Chinese Journal of Aeronautics 2024年第5期37卷 558-569页

作者： Dong WU Yaxin XU wenya LI Xiawei YANG Yu su State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory of Friction Welding Technologies School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Electric Pulse Processing(EPP)treatment was innovatively introduced to optimize the strength and ductility of the CSAMed Cu *** results show that EPP is an efficient and fast post-treatment to improve the strength and ductility(within tens of seconds).The larger the pulse current and number of pulses,the better the mechanical ***,this research found that when the heat input determined by pulse current and number of pulses exceeds a certain threshold(pulse current intensity is 2000 A,number of pulses is 10),increasing the number of repeat time could also effectively improve the mechanical properties.A tensile strength of 210 MPa and a ductility of 14.0%could be obtained with reasonable EPP parameters(pulse current intensity is 2000 A,number of pulses is 10,and repeat number is 2),which is similar to those of conventional annealing(e.g.,tensile strength is 272 MPa,elongation is 28.3%).The microstructure evolution analysis shows that EPP can effectively improve the bonding quality between the deposited particles by recrystallization,promote grain growth and the formation of twins,which is the main reason for the improvement of mechanical properties.

关键词： Cold spray additive manufacturing Copper deposit Mechanical property Electric pulse processing Post treatment

Strengthening mechanism and forming control of linear friction welded GH4169 alloy joints

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Chinese Journal of Aeronautics 2024年第4期37卷 609-626页

作者： Yu su Xiawei YANG Tingxi MENG Xinyuan HE Dong WU wenya LI Shuo YIN State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory of Friction Welding Technologies School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Mechanical Manufacturing and Biomedical EngineeringParsons BuildingTrinity College DublinThe University of DublinDublin 2Ireland

Numerical simulation and experimental research on Linear Friction Welding(LFW) for GH4169 superalloy were carried out. Based on the joint microstructure and mechanical properties,a suitable welding process was determined, which provided an important theoretical basis for the manufacture and repair of aeroengine components such as the superalloy blisk. The results show that the joint strain rate gradually increases with the increase of welding frequency, and the deformation resistance of the thermoplastic metal increases in the welding process, resulting in the interface thermoplastic metal not being extruded in time to form a flash, so the joint shortening amount gradually decreases. The thermoplastic metal in the center of the welding surface is kept at high welding temperature for a long time, resulting in the decrease of the joint strength. The microhardness of the joint shows a “W” distribution perpendicular to the weld, and most of the joints break in the Thermo-Mechanically Affected Zone(TMAZ) with high tensile strength and low *** the welding area is increased without changing the aspect ratio of the welding surface, the interface peak temperature increases gradually, and the joint shortening amount decreases with the increase of the welding interface size.

关键词： Linear Friction Welding(LFW) Microstructure Mechanical properties Numerical simulation Joint shortening amount

“互联网+”备赛提升护生创新创业能力的效果评价

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创新创业理论研究与实践 2024年第11期7卷 193-198页

作者：梁西凤苏文雅吕娅宁张书翰王文军迟诚山东第二医科大学济宁医学院山东第一医科大学潍坊护理职业学院

目的探讨“互联网+”大赛培训在护理本科生创新创业能力中应用的效果。方法选取山东省某高校177名全日制统招在校护理本科生为研究对象，有针对性地进行“互联网+”大赛培训，分别于培训前和培训后采用问卷星的方式，应用大学生创新... 详细信息

目的探讨“互联网+”大赛培训在护理本科生创新创业能力中应用的效果。方法选取山东省某高校177名全日制统招在校护理本科生为研究对象，有针对性地进行“互联网+”大赛培训，分别于培训前和培训后采用问卷星的方式，应用大学生创新创业能力自评量表对学生的创新创业能力展开调查。结果 “互联网+”大赛培训后学生的创新创业能力总分及4个维度（创业人格、基本创业能力、核心创业能力和社会应对能力）均显著高于培训前（P<0.05）。结论有针对性地进行“互联网+”大赛培训可有效提升护理本科生的创新创业能力。

关键词： “互联网+” “互联网+”大赛培训创新创业大赛创新创业能力护理护理本科生

Effect of linear friction welding process on microstructure evolution,mechanical properties and corrosion behavior of GH4169 superalloy

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Chinese Journal of Aeronautics 2024年第6期37卷 504-520页

作者： Yu su Xiawei YANG Tingxi MENG Dong WU Rui XU Haiyu XU wenya LI Shuo YIN State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Mechanical Manufacturing&Biomedical EngineeringParsons BuildingTrinity College DublinThe University of DublinDublin 2Ireland

Linear Friction Welding(LFW)technology was used to realize the welding of GH4169 superalloy,and the effect of welding parameters on the microstructure,mechanical properties and corrosion behavior of the joint was *** results show that there is a positive correlation between the weld hardness and the tensile *** the gradual increase of heat input and welding pressure,the joint quality is gradually improved,but the heat affected zone is not significantly *** smaller the grain size of the weld,the higher the strength and plasticity of the *** the increase of the joint shortening amount,the corrosion resistance of the weld first gradually ***,when the shortening reaches a certain level,the corrosion resistance of the joint becomes little *** the increase of solution temperature,the corrosion current density increases and the polarization impedance *** higher the corrosion temperature,the worse the corrosion resistance of the *** is no significant correlation between the joint strength and the corrosion *** corrosion resistance of the joint can be enhanced without changing the joint mechanical properties by reducing the welding frequency and amplitude or increasing the welding pressure.

关键词： Linear Friction Welding(LFW) GH4169 superalloy Microstructure Mechanical properties Corrosion behavior

A review of linear friction welding of Ni -based superalloys

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1382-1391页

作者： Xiawei Yang Tingxi Meng Qiang Chu Yu su Zhenguo Guo Rui Xu Wenlong Fan Tiejun Ma wenya Li State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Friction Welding TechnologiesNorthwestern Polytechnical UniversityXi’an 710072China Xi’an Aerospace Engine Co.Ltd. Xi’an 710100China

Ni-based superalloys are one of the most important materials employed in high-temperature applications within the aerospace and nuclear energy industries and in gas turbines due to their excellent corrosion,radiation,fatigue resistance,and high-temperature *** friction welding(LFW)is a new joining technology with near-net-forming characteristics that can be used for the manu-facture and repair of a wide range of aerospace *** paper reviews published works on LFW of Ni-based superalloys with the aim of understanding the characteristics of frictional heat generation and extrusion deformation,microstructures,mechanical proper-ties,flash morphology,residual stresses,creep,and fatigue of Ni-based superalloy weldments produced with LFW to enable future optim-um utilization of the LFW process.

关键词： Ni-based superalloys linear friction welding microstructures mechanical properties flash morphology

Diagnostic value of combination of rapid on-site evaluation and radial endobronchial ultrasound for peripheral pulmonary infectious lesions

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Chinese Medical Journal 2022年第23期135卷 2869-2871页

作者： Min Li Jiaqi Cao Qian He Ming Zhang Qianqian Xu wenya su Chunlai Feng Department of Respiratory and Critical Care Medicine The Third Affiliated Hospital of Soochow UniversityChangzhouJiangsu 213003

Peripheral pulmonary lesions(PPLs)are surrounded by lung parenchyma and invisible under an *** detection rate of PPLs by routine bronchoscopy is *** endobronchial ultrasound(R-EBUS)can overcome those limitations,as it can locate peripheral bronchial lesions through a characteristic ultrasound *** on-site evaluation(ROSE)is a real-time rapid cytological interpretation technology accompanied by tissue *** helpful in improving the diagnostic rate of R-EBUS for PPLs,especially lung cancer.[1]However,the utility of ROSE during R-EBUS for peripheral pulmonary infectious lesions(infectious PPLs)is *** study aimed to analyze the diagnostic value and safety of R-EBUS combined with ROSE in infectious *** study was approved by the Ethics Committee of the Third Affiliated Hospital of Soochow University(No.2019-017).The informed consent form was signed by the patient or his or her authorized legal representative.

关键词： lesions routine legal

东非女性书写的开拓者——肯尼亚作家格雷斯·奥戈特创作论

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外国语文研究 2022年第3期8卷 22-28页

作者：苏文雅北京外国语大学非洲学院

肯尼亚作家格雷斯·奥戈特是东非女性书写的开拓者。60年代起,她用细腻的笔触描摹殖民前肯尼亚女性的传统生活,着重刻画殖民和后殖民社会中她们遭遇的多重困境,反映了她们奋起反抗、艰难成长的抗争历程,塑造了一系列坚毅果敢的非洲女性... 详细信息

肯尼亚作家格雷斯·奥戈特是东非女性书写的开拓者。60年代起,她用细腻的笔触描摹殖民前肯尼亚女性的传统生活,着重刻画殖民和后殖民社会中她们遭遇的多重困境,反映了她们奋起反抗、艰难成长的抗争历程,塑造了一系列坚毅果敢的非洲女性形象,扭转了同时代非洲作家笔下负面的女性形象。在美学层面,奥戈特采用“颠覆”以往的男性形象的叙事技巧,为女性构筑空间。奥戈特的开创性写作,为东非女性文学史画上了浓墨重彩的一笔。

关键词：格雷斯·奥戈特女性书写肯尼亚文学

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伊维德及其对中国文学的译介

外国语文研究 2021年第2期7卷 79-86页

作者：苏文雅胡安江上海师范大学人文学院上海200234 四川外国语大学翻译学院重庆400031

伊维德是著名荷兰汉学家,一生致力于中国话本小说、戏曲和古代通俗文学研究。多年来,他用荷兰语和英语向世界读者译介中国文学,在西方汉学界产生深远影响。伊维德非常重视版本,翻译时总是以戏曲的最早版本为底本进行翻译。他还发现了中... 详细信息

伊维德是著名荷兰汉学家,一生致力于中国话本小说、戏曲和古代通俗文学研究。多年来,他用荷兰语和英语向世界读者译介中国文学,在西方汉学界产生深远影响。伊维德非常重视版本,翻译时总是以戏曲的最早版本为底本进行翻译。他还发现了中国古代说唱文学的重要价值,是西方译介中国古代通俗文学最多的汉学家之一。伊维德的译介活动对中国文学在海外的传播起到了不可小觑的推动作用。

关键词：伊维德戏曲通俗文学汉学

文本的改写与主体的重构——诺奖作家古尔纳小说《多蒂》创作论

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广东外语外贸大学学报 2022年第4期33卷 52-63,158页

作者：朱振武苏文雅上海师范大学上海师范大学上海市世界文学多样性与文明互鉴创新团队

2021年诺贝尔文学奖得主坦桑尼亚作家古尔纳的第三部长篇小说《多蒂》以出生在英国的黑人女孩多蒂为主人公,讲述其在伦敦艰难谋生、自强奋斗的立志故事,但文本的深处却是对殖民问题及其后果的深切关怀。小说取得成功的一个重要原因是作... 详细信息

2021年诺贝尔文学奖得主坦桑尼亚作家古尔纳的第三部长篇小说《多蒂》以出生在英国的黑人女孩多蒂为主人公,讲述其在伦敦艰难谋生、自强奋斗的立志故事,但文本的深处却是对殖民问题及其后果的深切关怀。小说取得成功的一个重要原因是作者继承并改写了以狄更斯为代表的英国经典成长小说传统,同时又重构了以非洲人为主体的成长小说,进而完成了帝国叙事的后殖民逆写。

关键词：古尔纳《多蒂》成长小说改写与重构

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