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材料科学技术（英文版）
材料科学技术（英文版）

胡壮麟

月刊

1005-0302

jmst@imr.ac.cn

024-83978208

110016

沈阳市沈河区文化路72号

材料科学技术（英文版）/Journal Journal of Materials Science & TechnologyCSCDCSTPCD北大核心EISCI
查看更多>>本刊简称《JMST》，（ISSN 1005-0302，CN 21-1315/TG）。1985年创刊。是中国科协主管，中国金属学会，中国材料研究学会和中国科学院金属研究所联合主办的国际性英文期刊，以“加强国际交流，扩大学术影响，服务经济建设”为办刊宗旨，刊登世界各国的具有创新性和较高学术水平的原始性论文，并设有物约综述、快报、简讯及国内外材料界杰出学者简介等栏目，内容包括金属材料、无机非金属材料、复合材料及有机高分子材料等。
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    High-strength diffusion bonding of oxide-dispersion-strengthened tungsten and CuCrZr alloy through surface nano-activation and Cu plating

    Yuanyuan ChenYuan HuangFei LiLu Han...
    186-194页
    查看更多>>摘要：Oxide-dispersion-strengthened tungsten(ODS-W)and a CuCrZr alloy were bonded by a three-step pro-cess:(i)surface nano-activation,(ii)copper plating followed by annealing,and(iii)diffusion bonding.The morphological and structural evolutions of ODS-W and the interface of the ODS-W/CuCrZr joint during these processes have been thoroughly studied by X-ray diffraction,scanning electron microscopy,en-ergy dispersive spectrometry,and high-resolution transmission electron microscopy.After surface nano-activation,a nanoporous structure of ODS-W with an average pore size of～100 nm was obtained,and the Y2O3 particles therein remained unchanged.A Cu coating was tightly bonded with the surface nano-activated ODS-W after Cu plating and annealing.An interaction layer embedded with nanosized W par-ticles was formed at the interface between ODS-W and plated Cu after the three-step process.Conse-quently,well-cohesive ODS-W/Cu and ODS-W/Y2O3/Cu interfaces were formed.The ODS-W/CuCrZr joint showed high shear strengths(up to 201 MPa)and effective bonded area ratios(＞98％).The developed three-step bonding process between ODS-W and the CuCrZr alloy provides an effective support for future plasma-facing components in nuclear fusion reactor applications.
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    • 维普
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    Hierarchical grain size and nanotwin gradient microstructure for improved mechanical properties of a non-equiatomic CoCrFeMnNi high-entropy alloy

    Zibing AnShengcheng MaoYinong LiuHao Zhou...
    195-207页
    查看更多>>摘要：This study explored a multi-mechanism approach to improving the mechanical properties of a CoCr-FeMnNi high-entropy alloy through non-equiatomic alloy design and processing.The alloy design en-sures a single-phase face-centered cubic structure while lowering the stacking fault energy to encour-age the formation of deformation twins and stacking faults by altering the equiatomic composition of the alloy.The processing strategy applied helped create a hierarchical grain size gradient microstructure with a high nanotwins population.This was achieved by means of rotationally accelerated shot peen-ing(RASP).The non-equiatomic CoCrFeMnNi high-entropy alloy achieved a yield strength of 750 MPa,a tensile strength of 1050 MPa,and tensile uniform elongation of 27.5％.The toughness of the alloy was 2.53×1010 kJ/m3,which is about 2 times that of the same alloy without the RASP treatment.The strength increase is attributed to the effects of grain boundary strengthening,dislocation strengthening,twin strengthening,and hetero-deformation strengthening associated with the heterogeneous microstruc-ture of the alloy.The concurrent occurrence of the multiple deformation mechanisms,i.e.,dislocation deformation,twining deformation and microband deformation,contributes to achieving a suitable strain hardening of the alloy that helps to prevent early necking and to assure steady plastic deformation for high toughness.
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    The relationship between slip behavior and dislocation arrangement for large-size Mo-3Nb single crystal at room temperature

    Benqi JiaoQinyang ZhaoYongqing ZhaoLaiping Li...
    208-213页
    查看更多>>摘要：The slip behavior and mechanism of large-size Mo-3Nb single crystal have been investigated and dis-closed comprehensively at room temperature by quasi-static compression with various strains.With the increase of deformation,the slip traces change from shallow non-uniform slip lines to dense and uniform slip bands.Different slip traces in the same deformation condition were observed,suggesting that the slip traces in the single crystal are controlled by different types and arrangement mechanisms of mo-bile dislocation.To clarify the relationship between slip behavior and dislocation arrangement,TEM and AFM analyses were performed.Significant discrepancy between the mobility of screw segments and edge segments caused by double cross-slip multiplication mechanism is the reason why different slip features were witnessed.During the whole slip deformation process,screw dislocations play a dominant role and they are inclined to form wall-substructures by interaction and entanglement.With the development of dislocation accumulation,the entangled dislocation walls evolve into dislocation cells with higher stabil-ity.
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    Deteriorated corrosion performance of micro-alloyed Mg-Zn alloy after heat treatment and mechanical processing

    Yiming JinCarsten BlawertHong YangBj?rn Wiese...
    214-224页
    查看更多>>摘要：The corrosion performances of the as-cast and solution-treated Mg-0.5Zn samples were investigated in 0.9％NaCl solution and compared.From the electrochemical measurement results and corrosion morphol-ogy observations,it is found that the corrosion resistance of Mg-0.5Zn deteriorated with the extension of solution treatment duration.The main reason was the formation of Fe-Si precipitates with higher Fe concentrations during heat treatment.The Fe-Si precipitates,especially the ones with high Fe contents influenced the corrosion initiation and propagation significantly.In regard of corrosion performance,the solution-treated and then extruded sample was also performing not as good as the cast and then directly extruded sample.
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    One-pot scalable in situ growth of highly corrosion-resistant MgAl-LDH/MBT composite coating on magnesium alloy under mild conditions

    Ting HuYuejun OuyangZhi-Hui XieLiang Wu...
    225-235页
    查看更多>>摘要：Current corrosion-resistant layered double hydroxide(LDH)coating on Mg alloy is usually in situ grown in autoclave by hydrothermal methods under high temperature and high-pressure conditions,which is unfavorable for industrial application.We report that an inhibitor(2-mercaptobenzothiazole,MBT)incor-porated composite(MgAl-LDH/MBT)coating can be in situ deposited on bare AZ31 Mg alloy surface with the assistance of a chelating agent(ethylenediaminetetraacetic acid)under a relatively low temperature(95℃)and ambient pressure by a one-pot method.The successful formation of LDH/MBT composite coating is confirmed by a series of characterizations,such as X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and energy dispersive spectroscopy(EDS).The corrosion resistance of the compos-ite coating is evaluated by means of hydrogen evolution measurement,electrochemical impedance spec-troscopy(EIS),Tafel polarization curves,and neutral salt spray test.The tests show that the LDH/MBT composite coating has a very low corrosion current density(1.73 10-8 A cm-2),an extremely high charge transfer resistance(2.336 MΩ cm2),and does not show any corrosion pits even after 15 d of exposure to a NaCl solution or 7 d of exposure to salt fog environment,manifesting the good and robust corrosion protection.Lastly,the deposition and corrosion protection mechanisms of the MgAl-LDH/MBT composite coating are also discussed and proposed based on the EDS characterization of the coating after long-time exposure.
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