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Journal of Rare Earths 2020年第9期38卷 1030-1038,I0005页

作者： fuxing yin Lu Wang Zhixia Xiao Jianhang Feng Lin Zhao School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China Research Institute for Energy Equipment Materials Hebei University of TechnologyTianjin 300130China Tianjin Key Laboratory of Materials Laminating Fabrication and Interfacial Controlling Technology Tianjin 300130China Central Iron and Steel Research Institute Beijing 100081China

The effects of RE and Ti microalloying during electroslag remelting(ESR)process on the microsegregation and morphology of eutectic M2C carbides in M2 high speed steel were *** results show that the addition of 0.2 wt%RE can alleviate the segregation of C,W,Mo,V and Cr,while the morphology of eutectic M2C carbides hardly *** microalloying with the addition of 0.5 wt%Ti has the lowest degree of microsegregation due to the improvement of primary dendrites by the effective heterogeneous nucleating agent of(Ti,V)(C,N)*** addition of Ti makes the mo rphology of M2C carbides change from rod-like or maze-like shape into a coarse feathery shape,exhibiting anisotropic facet growth *** the microalloying of 0.2 wt%RE and 0.5 wt%Ti,the segregation of the main metal alloying elements is slightly more severe than that of the addition of only RE or *** the combined action of RE and Ti,the feathery eutectic M2C becomes thinner and shorter and tends to be isolated or distributed in a discontinuous network.

关键词： Microsegregation Morphology Eutectic carbides High speed steel Electroslag remelting Rare earths

Effects of Solid Solution Treating on the Microstructureand Damping Behaviour of MnCuNiFe Alloys

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Journal of Materials Science & Technology 1998年第4期14卷 299-307页

作者： yin, fuxing Ohsawa, Y. Sato, A. Kawahara, K. National Research Institute for Metals Tsukuba Ibaraki 305-0047 Japan B.B.Materia Co. Ltd. Chiba-Shi Chiba 267-0066 Japan

A high damping condition is easily obtained in Mn-(16-24) Cu-(4-6) Ni-2Fe (at. pct) alloys, when cooling rate is controlled after the solid solution treatment at 1173 K. It was observed that the temperature dependent changes of logarithmic decrement in 10 h cooled samples are sensitive to the alloy composition. As compared with water quenching treatment, controlled 10 h cooling improves T//N temperature of the alloys extensively by producing a Mn-enriched matrix portion in the alloys. Calculations suggest that the relative decreases of Cu and Ni content in the matrix portion be dominated by the Ni content in the original alloys, and therefore, the volume fraction of the Cu, Ni-enriched precipitates is estimated to be about 20% and 10% in the 4Ni and 6Ni alloys, respectively. As a result, the T//N temperature for each alloy, corresponding to the rising temperature of logarithmic decrement, has been related to the Cu, and Ni in the Mn-enriched matrix. The existence of left brace 110 right brace twinning boundaries is confirmed in the microstructure of both 4Ni and 6Ni alloys. However, the relative lattice strains, which the twinning boundaries act to accommodate, were found largely different in the two alloys. It is considered that boundaries with smaller orientation deviation can coordinate the external stresses easily by cyclic moving, and therefore, the broader damping peak which occurs in the 10 h cooled 6Ni alloy becomes feasible. Electron diffraction results also indicate possible formation of many sub-crystals in the matrix phase, which are relatively rotated on some invariant planes. Those sub-crystal boundaries might play some attenuation roles in the temperature range between T//N and room temperature. (Edited author abstract) 9 Refs.

关键词： Manganese alloys

High Damping Alloys and Their Application

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材料科学与工程学报 2000年第z1期20卷 48-55页

作者： fuxing yin National Research Institute for Metals Tsukuba 305-0047 Japan

Damping alloys show prospective applications in the elimination of unwanted vibrations and acoustic noise. The basic definitions and characterization methods of damping capacity are reviewed in this paper. Several physical mechanisms controlled by the alloy microstructure are responsible for the damping behavior in the damping alloys. Composite, dislocation, ferromagnetic and planar defect types are commonly classified for the alloys, which show the different damping behavior against temperature, frequency of vibration,amplitude of vibration and damping modes. Development of practically applicable damping alloys requires the higher mechanical properties and adequate workability, besides the high damping capacity. A new Mn-Cu damping alloy, named as M2052 alloy, is recently developed with possible industrial applications.

关键词： damping capacity damping behavior industrial applications mechanical properties alloy microstructure physical mechanisms damping alloy methods of

Three‑Dimensional Ordered Mesoporous Carbon Spheres Modified with Ultrafine Zinc Oxide Nanoparticles for Enhanced Microwave Absorption Properties

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Nano-Micro Letters 2021年第5期13卷 61-76页

作者： Yan Song fuxing yin Chengwei Zhang Weibing Guo Liying Han Ye Yuan School of Materials Science and Engineering Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control TechnologyHebei University of TechnologyTianjin 300130People’s Republic of China

Currently,electromagnetic radiation and interference have a significant effect on the operation of electronic devices and human health ***,developing excellent microwave absorbers have a huge significance in the material research ***,a kind of ultrafine zinc oxide(ZnO)nanoparticles(NPs)supported on three-dimensional(3D)ordered mesoporous carbon spheres(ZnO/OMCS)is prepared from silica inverse opal by using phenolic resol precursor as carbon *** prepared lightweight ZnO/OMCS nanocomposites exhibit 3D ordered carbon sphere array and highly dispersed ultrafine ZnO NPs on the mesoporous cell walls of carbon ***/OMCS-30 shows microwave absorbing ability with a strong absorption(−39.3 dB at 10.4 GHz with a small thickness of 2 mm)and a broad effective absorption bandwidth(9.1 GHz).The outstanding microwave absorbing ability benefits to the well-dispersed ultrafine ZnO NPs and the 3D ordered mesoporous carbon spheres *** work opened up a unique way for developing lightweight and high-efficient carbon-based microwave absorbing materials.

关键词： Three-dimensional ordered structure Mesoporous carbon spheres Zinc oxide nanoparticles Microwave absorption

Microstructure and mechanical properties of CoCrNi-Mo medium entropy alloys:Experiments and first-principle calculations

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Journal of Materials Science & Technology 2021年第3期62卷 25-33页

作者： Ruobin Chang Wei Fang Jiaohui Yan Haoyang Yu Xi Bai Jia Li Shiying Wang Shijian Zheng fuxing yin Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology Tianjin 300132China Research Institute for Energy Equipment Materials School of Materials Science and EngineeringHebei University of TechnologyTianjin 300132China School of Science Hebei University of TechnologyTianjin 300132China School of Materials Science and Engineering Changzhou UniversityChangzhou 213164China

The effect of Mo additions on the microstructures and mechanical properties of CoCrNi alloys was investigated,meanwhile,ab initio calculations are performed to quantitatively evaluate the lattice distortion and stacking fault energy(SFE).The yield strength,ultimate tensile strength,and elongation of(CoCrNi)_(97)Mo_(3)alloy are 475 MPa,983 MPa and 69%,*** yield strength is increased by~30%and high ductility is maintained,in comparison with CoCrNi *** the nano-twins and dislocations,the higher density of stacking faults is induced during the tensile deformation for(CoCrNi)_(97)Mo_(3)*** initio calculation results indicate the mean square atomic displacement(MSAD)and SFE value of(CoCrNi)_(97)Mo_(3)alloy is 42.6 pm^(2)and-40.4 mJ/m^(2)at 0 K,*** relationship between mechanical properties and MSAD,SFE for various multiple principal element alloys is discussed.

关键词： Medium entropy alloys Severe lattice distortion Stacking fault energy Single phase Mechanical properties Ab initio calculations High entropy alloys

Microstructural Evolution of Co_(35)Cr_(25)Fe_(30)Ni_(10) TRIP Complex Concentrated Alloy with the Addition of Minor Cu and Its Effect on Mechanical Properties

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Acta Metallurgica Sinica(English Letters) 2022年第8期35卷 1291-1300页

作者： Haoyang Yu Wei Fang Jinfei Zhang Jiaxin Huang Jiaohui Yan Xin Zhang Juan Wang Jianhang Feng fuxing yin School of Materials Science and Engineering Hebei University of TechnologyTianjin 300132China Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology Tianjin 300132China Institute of Materials and Processing Guangdong Academy of SciencesGuangzhou 510650China

The influences of minor Cu addition(2 and 4 at.%)on the microstructural evolution and room-temperature mechanical property of metastable Co_(35)Cr_(25)Fe_(30)Ni_(10)are systemically investigated in the present *** results indicate that the thermally induced hexagonal close-packed(HCP)phase is absent when Cu was added,due to the increase in stacking fault energy(SFE).The 2%-Cu-added alloys showed the largest total elongation of 69%among the three *** the addition of Cu content reaching 4 at.%,heterogeneous grain structures composed of coarse grains(~9μm)and fine grains(~4μm)and Cu-rich precipitates near the grain boundary are observed,showing the highest yield ***,the segregation state of Cu was quantitatively characterized by electron probe microanalysis(EPMA).And effects of Cu addition on microstructures and tensile properties of(Co_(35)Cr_(25)Fe_(30)Ni_(10))_(100-x) Cu _(x) are also *** findings are beneficial to comprehensively understand the Cu-containing complex concentrated alloys.

关键词： Complex concentrated alloy High entropy alloy Cu addition Microstructures Mechanical properties

Effect of Austenite Pre-deformation on Isothermal Martensite Transformation in an Fe-20.5Ni-4.8Mn Alloy

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Journal of Materials Science & Technology 1995年第1期11卷 61-66页

作者： fuxing yin Jianxin ZHANG and Nanju GU(Hebei Institute of Technology, Tianjin, 300132, China)Tsukio Tadaki(Institute of Science and Industrial Research, Osaka University, Japan)Ken,ichi Shimizu(Kanazawa Institute of Technology, Ishigawa 921, Japan) HEBEI INST TECHNOL TIANJIN 300132PEOPLES R CHINA OSAKA UNIV INST SCI & IND RESOSAKAJAPAN KANAZAWA INST TECHNOL KANAZAWAISHIKAWA 921JAPAN

With electron microscopy the investigation on isothermal martensite transformation in an Fe20.5Ni-4.8Mn alloy has been carried out to clarify the effect of austenite state on the transformation, by applying pre-deformation to austenite before isothermal holding. Under the condition without pre-deformation, the isothermal martensite products are lath martensite with {111}fhabit planes. Dislocations in austenite seem to contribute to nucleation of martensite, and in this nascent Stage austenite substructure has no obvious effect on martensite growth. The consequent thickening of martensite laths is apparently influenced by local austenite states, resulting in the changes in orientation, morphology as well as substructure of martensite lath. The kinetics of isothermal martensite transformation is controlled by intedece dislocation determined nucleation of martensite in primary stage, but to a larger extent, by the austenite accommodation for the shape strain of martensite in the thickening Stage

关键词： Mn Ni Fe Effect of Austenite Pre-deformation on Isothermal Martensite Transformation in an Fe-20.5Ni-4.8Mn Alloy Figure

EFFECT OF SELF-ACCOMMODATION FOR TWINNED MARTENSITE AND INVARIANT HABIT PLANE

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Acta Metallurgica Sinica(English Letters) 1991年第6期4卷 419-425页

作者： GU Nanju WANG Ruixiang yin fuxing Hebei Institute of Technology,Tianjin,China

The shear components of strain tensors for matrix and twin crystal of winned martensite were roughly opposite after calculation,and the strain energy would be *** growth of martensitic plates along the normal direction of the twin plane may depend upon the effect of self-accommodation between the matrix and twin *** upon the analysis on the displacement vectors of the normals for different habit planes,the{10,3,15}_f plane could form the macroscopic invariant habit plane;but the(55)_f,(22)_f,and(11)_f planes are difficult to become the invariant planes.

关键词： self-accommodation invariant habit planes displacement vector

MORPHOLOGY OF MARTENSITE IN 7CrSiMnMoV STEEL AND ITS STRENGTH-TOUGHNESS

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Acta Metallurgica Sinica(English Letters) 1991年第6期4卷 462-466页

作者： WANG Ruixiang GU Nanju yin fuxing Hebei Institute of Technology,Tianjin,China

The morphology and substructure of martensites in 7CrSMnMoV steel were observed under optical or electron microscope,and martensitic transformation with its morphology was also *** the normally quenched steel three types of martensites are found,including the wide lath one of dislocation substructure formed preferentially along grain boundaries,the thinner inner laths and the twinning martensite plate in interior of ***,an at- tempt was made to substitute lower bainite,formed by short-term isothermal *** intergranular martensite,it is believed that the morphology would be very influential to the stength-toughness of the steel.

关键词： 7CrSiMnMoV steel martensite strengthening

Faceted Kurdjumov-Sachs interface-induced slip continuity in the eutectic high-entropy alloy,AlCoCrFeNi_(2.1)

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Journal of Materials Science & Technology 2021年第6期65卷 216-227页

作者： Ting Xiong Wenfan Yang Shijian Zheng Zhaorui Liu Yiping Lu Ruifeng Zhang Yangtao Zhou Xiaohong Shao Bo Zhang Jun Wang fuxing yin Peter K.Liaw Xiuliang Ma Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Material Science and Engineering.University of Science and Technology of China Hefei 230026China Tianjin Key Laboratory of Materials Lamninating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjin 300130China School of Materials Science and Engineering Beihang UniversityBeijing 100191China Center for Integrated Computational Materials Engineering(International Research Institute for Multidisciplinary Science)and Key Laboratory of High-Temperature Structural Materials 8 Coatings Technology(Ministry of Industry and Informnation Technology) Beihang UniversityBeijing 100191China Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072.China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN37996USA School of Material Science and Engineering Lanzhou University of TechnologyLanzhou 730050China

Recently,the eutectic high-entropy alloy(EHEA),AlCoCrFeNi_(2.1),can reach a good balance of strength and *** dual-phase alloy exhibits a eutectic lamellar microstructure with large numbers of ***,the role of the interfaces in plastic deformation have not been revealed *** the present work,the orientation relationship(OR)of the interfaces has been clarified as the Kurdjumov-Sachs(KS)interfaces presenting〈111〉_(B2) 〈110〉_(FCC)and {110} _(B2){111}_(FCC) independent of their *** exist three kinds of interfaces in the EHEA,namely,The dominating interface and the secondary interface are both non-slip planes and atomistic-scale faceted,facilitating the nucleation and slip transmission of the *** formation mechanism of the preferred interfaces is revealed using the atomistic geometrical analysis according to the criteria of the low interfacial energy based on the coincidence-site lattice(CSL)*** particular,the ductility of the dual-phase alloy originates from the KS interface-induced slip continuity across interfaces,which provides a high slip-transfer geometric ***,the strengthening effect can be attributed to the interface resistance for the dislocation transmission due to the mismatches of the moduli and lattice parameters at the interfaces.

关键词： High-entropy alloy AICoCrFeNi_(2.1) Interface Kurdjumov-Sachs(KS) Dislocation