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非对称交叉轧制对AZ31镁合金微观组织的影响

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热加工工艺 2024年第13期53卷 126-129页

作者：王岭赵一权王轶农李璞营口理工学院辽宁省化学助剂合成与分离重点实验室辽宁营口115014 海南科技职业大学化学与材料工程学院海南海口330044 中汽研汽车检验中心(天津)有限公司天津300300 大连理工大学材料科学与工程学院辽宁大连116024 国合通用测试评价认证股份公司北京101140

采用金相显微镜、背散射电子衍射仪(EBSD)研究了对称交叉轧制和非对称交叉轧制对AZ31镁合金微观组织的影响。结果表明:非对称交叉轧制在晶粒细化方面明显优于对称交叉轧制。经4道次非对称交叉轧制退火后,AZ31镁合金平均晶粒尺寸为10μm... 详细信息

采用金相显微镜、背散射电子衍射仪(EBSD)研究了对称交叉轧制和非对称交叉轧制对AZ31镁合金微观组织的影响。结果表明:非对称交叉轧制在晶粒细化方面明显优于对称交叉轧制。经4道次非对称交叉轧制退火后,AZ31镁合金平均晶粒尺寸为10μm,而经4道次对称交叉轧制后AZ31镁合金平均晶粒尺寸为20μm。与对称交叉轧制AZ31板材相比,非对称交叉轧制AZ31板材(0002)基面织构强度较低,且极轴偏离ND方向20°左右。

关键词： AZ31镁合金非对称交叉轧制微观组织

Ni_(3)Al基高温合金的成分设计及室温性能

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金属热处理 2024年第3期49卷 209-214页

作者：滕宗延许雅南王轶农刘林徐朝晖大连理工大学材料科学与工程学院辽宁大连116024

为改善Ni_(3)Al基高温合金的室温性能,基于“团簇加连接原子模型”对Ni_(3)Al基合金进行了成分设计,考察了合金的显微组织、力学性能和耐蚀性。结果表明,退火前后合金均由β相、α相和基体γ′相组成。1050℃×24 h退火后Ni5Co5Cr2Al2.5... 详细信息

为改善Ni_(3)Al基高温合金的室温性能,基于“团簇加连接原子模型”对Ni_(3)Al基合金进行了成分设计,考察了合金的显微组织、力学性能和耐蚀性。结果表明,退火前后合金均由β相、α相和基体γ′相组成。1050℃×24 h退火后Ni5Co5Cr2Al2.5Ti1.5合金中β相和α相在基体中分布均匀,不仅使其呈现出更优的力学性能(最大压缩率为29.35%,屈服强度为1796 MPa,硬度为546.35 HV),还诱导合金发生电偶腐蚀,增强了合金的钝化效果,使合金呈现出更好的耐蚀性(阻抗为7.74×10^(4)Ω,自腐蚀电位为-0.055 V(vs SCE),自腐蚀电流密度为5.93×10^(-7)A/cm^(2))。本文所设计合金的室温力学性能和耐蚀性与Ni_(3)Al相比均有显著改善,为高温合金的成分设计提供了新的研究思路。

关键词： Ni_(3)Al基合金团簇加连接原子模型退火处理显微组织

Influence of Texture on Hall-Petch Slope in Hot-extruded AZ31 Magnesium Alloys

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Journal of Wuhan University of Technology(Materials Science) 2023年第4期38卷 917-923页

作者：王岭 ZHAO Yiquan wang Yanmeng SUN Chao CHEN Hongmei ZHANG Jing ZHAO Mei LIU Ying wang yinong Liaoning Key Laboratory of Chemical Additive Synthesis and Separation Yingkou Institute of TechnologyYingkou115014China CATARC Automotive Test Center(Tianjin)Co. LtdTianjin300399China School of Electrical Engineering Dalian University of TechnologyDalian116024China Provincial Key Lab of Advanced Welding Technology Jiangsu University of Science and TechnologyZhenjiang212003China School of Metallurgy and Materials Engineering Jiangsu University of Science and TechnologyZhangjiagang215600China School of Materials Science and Engineering Dalian University of TechnologyDalian116024China

To study the influence of texture on Hall-Petch slope,the Hall-Petch relationships of two hot-extruded AZ31 alloys(A117 and A189)were determined by the measurement of yield strength at room *** determine the real texture difference,the texture changes were facilitated by the variation of extrusion ratio and demonstrated by the actual grain orientation *** A117 alloys exhibited higher Hall-Petch slope in comparison of A187 in the condition of tension and compression,because A117 alloys had lower volume fraction of grains in the range of basal pole 75°-90°.The Hall-Petch slope differences for both alloys were analyzed and discussed by boundary obstacle against deformation propagation in grains with various *** to the higher volume fraction of grains in the range of basal pole 75°-90°in A189,the effect of hindering dislocation slip or twinning propagation by grains boundary was weaker than of A117.

关键词： Hall-Petch relationship AZ31 texture

Microstructure and Mechanical Properties of AZ31 Alloys Processed by Residual Heat Rolling

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Journal of Wuhan University of Technology(Materials Science) 2021年第4期36卷 588-594页

作者： LIU Yang ZHAO Yiquan wang Ling JIN Xiuying SUN Chao wang Xiaomin wang Gang DAI Shiyu wang yinong School of Materials Science and Engineering Yingkou Institute of TechnologyYingkou 115014China College of Chemistry and Materials Engineering Hainan Vocational University of Science and TechnologyHaikou 330044China CATARC Automotive Test Center(Tianjin)Co. LtdTianjin 300300China School of Electrical Engineering Dalian University of TechnologyDalian 116024China School of Materials Science and Engineering Dalian University of TechnologyDalian 116024China

To produce high strength and ductility Mg alloys with high productivity and low energy consumption,the residual heat rolling (RHR) process was initially *** microstucture and mechanical properties of AZ31 processed by RHR were investigated by optical micrscopy (OM),electron backscatter diffraction (EBSD),and electron universal testing *** yield strength (YS),ultimate tensile strength (UTS),and elongation to failure of RHRed AZ31 sheet were 194 MPa,311 MPa,and 22%,*** RHRed AZ31 alloys after annealing have very fine and homogeneous *** symmetrical rolled (SR) and RHRed AZ31 exhibit typical {0002} basal *** RHRed AZ31 has double-peak basal texture *** basal poles of RHRed AZ31 split from normal direction (ND) to rolling direction (RD).There are few hard orientation distributions on the basal slip and more soft orientation distributions on the prismatic slip in the RHRed AZ31 sheets than those in the SRed AZ31sheets.

关键词： magnesium alloys microstructure texture grain refinement mechanical properties residual heat rolling

Quantitative analysis on friction stress of hot-extruded AZ31 magnesium alloy at room temperature

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Journal of Materials Science & Technology 2018年第10期34卷 1765-1772页

作者： Ling wang Yiquan Zhao Jing Zhang Ru Ma Yandong Liu yinong wang Qun Zhang Weigang Li Yuan Zhang School of Materials Science and Engineering Northeastern University Shenyang 110819 China School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China Yingkou Institute of Technology Yingkou 115014 China School of Metallurgy and Materials Engineering Jiangsu University of Science and Technology Zhangjiagang 215600 China Bayuquan Entry-Exit inspection and Quarantine Bureau Yingkou 115000 China

Mg alloy AZ31 with ~79% （volume fraction of scattering less than 30°） basal-fiber texture through hot extrusion exhibits strong grain-size dependent yield strength, Samples with grain sizes varying from 4,5 to 22,3 μm were obtained by altering annealing time durations, The Hall-Petch relations of tension and compression are σ.2 = 86＋200d^-1/2 and σ0.2 = 17 ＋ 327d^-1/2, respectively, Considering the correlation between grain orientation and deformation modes, a novel weighted average method of calculating friction stress Cro was proposed, and results of calculation agreed with the experimental ones, which can reasonably understand the yielding behavior in tension and compression,

关键词： Mg alloy A731 Hot extrusion Basal-fiber texture Hall-Petch relation

电子束精炼FGH4096合金夹杂物冶金机制

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特殊钢 2024年第4期45卷 47-54页

作者：董立阳游小刚董庚益王轶农谭毅大连理工大学材料科学与工程学院大连116024 郑州大学中原关键金属实验室郑州450001

研究了不同电子束精炼参数对熔体凝固过程中夹杂物的类型、数量和尺寸分布等影响机制。通过对不同功率精炼后FGH4096合金中O和N含量以及夹杂物的类型、数量和尺寸分布进行了统计分析,结合夹杂物生长动力学揭示了电子束精炼功率对夹杂物... 详细信息

研究了不同电子束精炼参数对熔体凝固过程中夹杂物的类型、数量和尺寸分布等影响机制。通过对不同功率精炼后FGH4096合金中O和N含量以及夹杂物的类型、数量和尺寸分布进行了统计分析,结合夹杂物生长动力学揭示了电子束精炼功率对夹杂物生长的影响。电子束精炼制备的FGH4096合金中碳氮化合物和复合相夹杂物的数量密度在夹杂物中占比最大,两者占比达到了95.53%。在碳氮化合物和复合相夹杂物中,TiN-TiC、TiN-(Ti,M)C和Al_(2)O_(3)-TiN-(Ti,M)C的占比较大。夹杂物生长动力学计算结果表明,功率从9 kW增加到12 kW时,由于功率的增加提升了夹杂物形成元素的去除效率,限制夹杂物生长所需的元素含量、降低夹杂物的形成温度从而缩短其生长温度区间。此外,由于冷速变化较小导致夹杂物的生长时间较短,夹杂物尺寸减小。而当功率从12 kW增加到15 kW时,O和N含量降幅较小而熔体冷速的降幅较大,导致夹杂物的生长时间延长。这降低了杂质元素含量去除所带来的影响,夹杂物尺寸增大。

关键词：电子束精炼 FGH4096 夹杂物动力学

Interface evolution in the platelet-like SiC@C and SiC@ SiO2 monocrystal nanocapsules

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Nano Research 2017年第8期10卷 2644-2656页

作者： Jian Gao Jieyi Yu Lei Zhou Javid Muhammad Xinglong Dong yinong wang Hongtao Yu Xie Quan Shaojie Li Youngguan Jung Key Laboratory of Materials Modification by Laser Ion and Electron Beams (Ministry of Education) School of Materials Science and Engineering Dalian University of Technology Dalian 115023 China Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) School of Environmental Science and Technology Dalian University of Technology Dalian 116024 China InstrumentalAnalysis and Research Center Dalian University of Technology Panjin 124221 China Department of Mechanical Engineering Kumoh National Institute of Technology Daeharkro 53 Gumi Gyeong-Buk 730-701 Republic of Korea

Carbon-coated SiC@C nanocapsules （NCs） with a hexagonal platelet-like morphology were fabricated by a simple direct current （DC） arc-discharge plasma method. The SiC@C NCs were monocrystalline, 120-150 nm in size, and approximately 50 nm thick. The formation of the as-prepared SiC@C NCs included nucleation of truncated octahedral SiC seeds and subsequent anisotropic growth of the seeds into hexagonal nanoplatelets in a carbon-rich atmosphere. The disordered carbon layers on the SiC@C NCs were converted into SiO2 shells of SiC@SiO2 NCs by heat treatment at 650 ℃ in air, during which the shape and inherent characteristics of the crystalline SiC core were obtained. The interface evolution from carbon to SiO2 shells endowed the SiC@SiO2 NCs with enhanced photocatalytic activity due to the hydrophilic and transparent nature of the SiO2 shell, as well as to the photosensitive SiC nanocrystals. The band gap of the nanostructured SiC core was determined to be 2.70 eV. The SiC@SiO2 NCs degraded approximately 95% of methylene blue in 160 min under visible light irradiation.

关键词： silicon carbide silicon oxide nanocapsule monocrystal photocatalyst

A Soft Sensor with Light and Efficient Multi-scale Feature Method for Multiple Sampling Rates in Industrial Processing

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Machine Intelligence Research 2024年第2期21卷 400-410页

作者： Dezheng wang Yinglong wang Fan Yang Liyang Xu yinong Zhang Yiran Chen Ning Liao School of Automation Southeast UniversityNanjing 210096China Software and Artificial Intelligence College Chongqing Institute of EngineeringChongqing 400056China Beijing National Research Center for Information Science and Technology(BNRist) Department of AutomationTsinghua UniversityBeijing 100084China Liangjiang International College Chongqing University of TechnologyChongqing 401135China Smart City College Beijing Union UniversityBeijing 100101China

In industrial process control systems,there is overwhelming evidence corroborating the notion that economic or technical limitations result in some key variables that are very difficult to measure *** data-driven soft sensor is an effective solution because it provides a reliable and stable online estimation of such *** paper employs a deep neural network with multiscale feature extraction layers to build soft sensors,which are applied to the benchmarked Tennessee-Eastman process(TEP)and a real wind farm *** comparison of modelling results demonstrates that the multiscale feature extraction layers have the following advantages over other ***,the multiscale feature extraction layers significantly reduce the number of parameters compared to the other deep neural ***,the multiscale feature extraction layers can powerfully extract dataset ***,the multiscale feature extraction layers with fully considered historical measurements can contain richer useful information and improved representation compared to traditional data-driven models.

关键词： Multi-scale feature extractor deep neural network(DNN) multirate sampled industrial processes prediction

TENSILE FRACURE IN AN Al-Li ALLOY 8090

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中国有色金属学会会刊：英文版 1995年第2期5卷 106-108页

作者： Jiang, Daming wang,yinong Hong, Bande Lei, Tingquan(Harbin Institute of Technology, Harbin 150080)Sun Fenglian(Harbin University of Science and Technology, Harbin 150001) Harbin Inst of Technology Harbin China

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关键词： Al-Li alloy tensile fracture dimple rupture cleavage