检索结果-南通市图书馆

Journal of Materials Science & Technology 2020年第3期38卷 28-38页

作者： Guang-Jian Yuan Xian-Cheng Zhang Bo Chen Shan-Tung Tu Cheng-Cheng Zhang Key Laboratory of Pressure Systems and Safety Ministry of EducationSchool of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China The Institute for Advanced Manufacturing and Engineering Faculty of EngineeringEnvironment and ComputingCoventry UniversityCoventry CV65LZUK AECC Commercial Aircraft Engine Co.LTD Shanghai Engineering Research Center for Commercial Aircraft EngineShanghai 201108China

A crystal plasticity model is developed to predict the cyclic plasticity during the low-cycle fatigue of GH4169 *** plastic slip and energy dissipation as fatigue indicator parameters(FIPs)are used to predict fatigue crack initiation and the fatigue life until *** show that fatigue damage is most likely to initiate at triple points and grain boundaries where severe plastic slip and energy dissipation are *** predicted fatigue life until failure is within the scatter band of factor 2 when compared with experimental data for the total strain amplitudes ranging from 0.8%to 2.4%.Microscopically,the adjacent grain arrangements and their interactions account for the stress *** addition,different sets of grain orientations with the same total grain numbers of 150 were generated using the present *** show that different sets have significant influence on the distribution of stresses between each individual grain at the meso-scale,although little effect is found on the macroscopic length-scale.

关键词： Crystal plasticity Fatigue Finite element Life prediction Micro-mechanics nickel-base superalloy

Thermal desorption characteristic of helium ion irradiated nickel-base alloy

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第4期29卷 67-71页

作者： Shasha Lv Rui Zhu Yumeng Zhao Mingyang Li Guojing Wang Menglin Qiu Bin Liao Qingsong Hua Jianping Cheng Zhengcao Li Key Laboratory of Beam Technology and Material Modification Ministry of EducationCollege of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China Department of Engineering Physics Tsinghua UniversityBeijing 100084China School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

The nickel-base alloy is one of the leading candidate materials for generation IV nuclear reactor pressure *** evaluate its stability of helium damage and retention,helium ions with different energy of 80 keV and 180 keV were introduced by ion implantation to a certain dose(peak displacement damage 1-10 dpa).Then thermal desorption spectroscopy(TDS)of helium atoms was performed to discuss the helium desorption characteristic and trapping *** desorption peaks shift to a lower temperature with increasing dpa for both 80 keV and 180 keV irradiation,reflecting the reduced diffusion activation energy and faster diffusion within the *** main release peak temperature of 180 keV helium injection is relatively higher than that of 80 keV at the same influence,which is because the irradiation damage of 180 keV,helium formation and entrapment occur *** broadening of the spectra corresponds to different helium trapping sites(He-vacancies,grain boundary)and desorption mechanisms(different Hen Vm size).The helium retention amount of 80 keV is lower than that of 180 keV,and a saturation limit associated with the irradiation of 80 keV has been *** relatively low helium retention proves the better resistance to helium bubbles formation and helium brittleness.

关键词： nickel-base alloys helium ion irradiation thermal desorption spectroscopy

A united tension/compression asymmetry micro-mechanical model for nickel-base single-crystal alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2019年第6期26卷 621-630页

作者： Jian-feng Xiao Hai-tao Cui Hong-jian Zhang Wei-dong Wen Jiangsu Province Key Laboratory of Aerospace Power System State Key Laboratory of Mechanics and Control of Mechanical Structures College of Energy & Power Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 Jiangsu China

In recent years, the micro-deformation mechanisms of the tension/compression behavior for nickel-base single-crystal superalloys have been studied extensively and general agreements have been derived. based on these researches, a new model called united tension/compression asymmetry micro-mechanical model (UTCAM) has been proposed, which can effectively estimate the initial yield strength of nickel-base single-crystal (SC) superalloys under different loading directions. Considering the combined effects of octahedral slip system and cubic slip system, slip control factor is introduced in the UTCAM to determine the type of the open slip system of nickel-base single-crystal superalloys during deformation, thus making this model cover a rather wide range of application. Furthermore, the UTCAM is applied to hot tension and compression tests of three typical nickel-base SC superalloys (PWA1480-593 ℃, RENE N4-760 ℃ and DD407-760 ℃). The predicted initial yield strengths of the nickel-base SC superalloys are in good agreement with the experimental results, and the UTCAM proves to be effective.

关键词： nickel-base single-crystal superalloy Initial yield strength Tension compression asymmetry Micro/mechanical model

High temperature creep-rupture features of nickel-base single crystal superalloy

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2005年第S3期15卷 77-81页

作者：水丽金涛田素贵胡壮麒 Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China School of Materials Science and Engineering Shenyang University of Technology Shenyang 110023 ChinaSchool of Materials Science and Engineering Shenyang Institute of Technology Shenyang 110168 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China School of Materials Science and Engineering Shenyang University of Technology Shenyang 110023 China

The creep and rupture behavior of a nickel-base single crystal superalloy with [001] orientation was investigated at temperature of 10001040℃ and stress in the range of 150320MPa. The creep features and microstructure were studied by means of the measurement of creep curves and TEM observation. The results show that all creep curves exhibit a short primary and a dominant accelerated creep stage. From the creep parameters and TEM observations, it is suggested that the primary deformation mechanism has a change from precipitatation shearing by pairs of dislocation in the high applied stress region to dislocations climb around the γ′ particles in the low applied stress region. Furthermore, the detailed failure process and fracture surfaces were analyzed by SEM observation.

关键词： single crystal nickel-base superalloy tensile creep microstructure fracture

Hot Cracking Susceptibility of 800H and 825 nickel-base Superalloys during Welding via Spot Varestraint Test

在线全文

学校读者我要写书评

暂无评论

Journal of Metallic Material Research 2019年第1期2卷 19-29页

作者： Chih-Chun Hsieh Ching-Yi Pao Weite Wu Department of Aircraft Engineering Air Force Institute of TechnologyNo.1Julun Rd.Gangshan Dist.Kaohsiung City 820Taiwan Department of Materials Science and Engineering National Chung Hsing University145 Xingda Rd.Taichung 402Taiwan

Hot cracking susceptibility of fillers 52 and 82 in 800H and 825 nickel-base superalloys was discussed using the Spot Varestraint *** fillers of 52 and 82 were added into nickel-base superalloys via a gas tungsten arc welding(GTAW).Experimental results showed that the hot cracking sensitivity of the nickel-base superalloys with filler at high temperature was lower than that without *** hot cracking sensitivity had a slight effect when the filler 82 was *** total length of crack was increased,the liquid-solid(L-S)two-phase range is higher so that the hot cracking susceptibility will be *** morphologies of cracks included the intergranular crack in the molten pool,molten pool of solidification cracking,heat-affected zone of intergranular cracks,and transgranular crack in the heat-affected zone.

关键词： Gas tungsten arc welding Hot cracking sensitivity nickel-base superalloys Heat-affected zone

New Technology for Optimizing Melting Pool and Regulating Grain Formation in Laser Surface Remelting of Single Crystal Superalloys

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料导报 2019年第4期33卷 569-570页

作者：金国 College of Material Science and Chemical Engineering Harbin Engineering University

nickel-base superalloys are materials of choice for manufacturing hot-section components in gas turbines due to their superior mechanical properties at high temperatures [1]. For maintaining and improving the properties, this kind of materials are often cast into single crystal form. Nevertheless, severe service conditions of high temperature and high pressure, often cause tip and platform damages.

关键词： nickel-base manufacturing hot-section