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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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    Formation mechanism of lamellae during β→α transformation in polycrystalline dual-phase Ti alloys

    Jia SunMin QiJinhu ZhangXuexiong Li...
    98-108页
    查看更多>>摘要：Phase field simulations incorporating contributions from chemical free energy and anisotropic interfacial energy are presented for the β→α transformation in Ti-6Al-4 V alloy to investigate the growth mechanism ofα lamellae of various morphologies from undercooled β matrix.The α colony close to realistic microstructure was generated by coupling the Thermo-Calc thermodynamic parameters of α and β phases with the phase field governing equations.The simulations show that α lamellar side branches with feathery morphology can form under a certain combination of interfacial energy anisotropy and temperature.α lamellae tend to grow slowly at high heat treatment temperature and become wider and thicker as temperature increase from 800 to 900 ℃ provided that the interfacial energy anisotropy ratio kx: ky was set as 0.1: 0.6.Besides,higher interfacial energy anisotropy can accelerate the formation of α lamellae,and the equilibrium shape of α lamellae changes from rod to plate as the interface energy anisotropy ratio kx∶ ky vary from 0.1∶ 0A to 0.1∶ 0.8 under 820 ℃.Experiments were conducted to study the α lamellar side branches in Ti-6Al-4 V (Ti-6.01Al-3.98 V,wt.％) and Ti-4211 (Ti-4.02Al-2.52V-1.54Mo-1.03Fe,wt.％) alloys with lamellar microstructure.Electron backscatter diffraction (EBSD) results show that α lamellar side branches and their related lamellae share the same orientation.The predicted temperature range for α lamellar side branches formation under various interfacial energy anisotropy is consistent with experimental results.
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    Interlayer material technology of manganese phosphate toward and beyond electrochemical pseudocapacitance over energy storage application

    Xu BaoWei-Bin ZhangQiang ZhangLun Zhang...
    109-128页
    查看更多>>摘要：Manganese phosphates have shown excellent performances and great potential in electrochemical energy storage,which are demonstrated by research works published in recent years.For manganese phosphates,the open-framework structures with large channels and cavities endow them with good ion conductivity and charge storage capacity.In this review,we present the recent progress on manganese phosphates,by focusing on their advantages/disadvantages and potential applications as a new class of electrode materials in supercapacitors.The structural characteristics,synthesis methods,and mineral sources to prepare these manganese phosphates are investigated,together with the modification,as they strongly affect the electrochemical energy storage performance.Attentions are paid to those hybrid-type materials,where strong synergistic effects exist.In the summary,interlayer engineering for the manganese phosphates and hybrid-types are proposed and discussed.
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    Coupling phase field with creep damage to study evolution and creep deformation of single crystal superalloys

    Min YangJun ZhangWeimin GuiSongsong Hu...
    129-137页
    查看更多>>摘要：A phase-field model coupling with elastoplastic deformation and creep damage has been built to study the microstructural evolution and deformation behavior for Ni-Al single crystal alloy during the whole creep processing.The relevant experiments were conducted to verify the model validity.The simulation results show that under the tensile creep at 1223 K/100 MPa,cubic γ'phases coarsen along the direction parallel to the axis of tensile stress during the first two creep stages;and spindle-shaped and wavy γ'phases are formed during tertiary creep,similar to the experimental results.The evolution mechanism ofγ'phases is analyzed from the perspective of changes of stress and strain fields.The "island-like" γ phase is observed and its formation mechanism is discussed.With the increase of creep stress,the directional coarsening of γ'phase is accelerated,the steady-state creep rate is increased and the creep life is decreased.The comparison between simulated and experimental creep curves shows that this phase-field model can effectively simulate the performance changes during the first two creep stages and predict the influence of creep stresses on creep properties.Our work provides a potential approach to synchronously simulate the creep microstructure and property of superalloys strengthened by γ'precipitates.
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    Deformation mechanism of bimodal microstructure in Ti-6Al-4V alloy: The effects of intercritical annealing temperature and constituent hardness

    Yan ChongTilak BhattacharjeeYanzhong TianAkinobu Shibata...
    138-151页
    查看更多>>摘要：The so-called bimodal microstructure of Ti-6Al-4V alloy,composed of primary α grains (αp) and transformed β areas (βtrans),can be regarded as a "dual-phase" structure to some extent,the mechanical properties of which are closely related to the sizes,volume fractions,distributions as well as nano-hardness of the two constituents.In this study,the volume fractions of primary α grains (vol.％(αp)) were systematically modified in three series of bimodal microstructures with fixed primary α grain sizes (0.8 μm,2.4 μm and 5.0μm),by changing the intercritical annealing temperature (Tint).By evaluating the tensile properties at room temperature,it was found that with increasing Tint (decreasing vol.％(αp)),the yield strength of bimodal microstructures monotonically increased,while the uniform elongation firstly increased with Tint until 910 ℃ and then drastically decreased afterwards,thereby dividing the Tint into two regions,namely region Ⅰ (830-910 ℃) and region Ⅱ (910-970 ℃).The detailed deformation behaviors within the two regions were studied and compared,from the perspectives of strain distribution analysis,slip system analysis as well as dislocation analysis.For bimodal microstructures in region Ⅰ,due to the much lower nano-hardness of βtrans than αp,there was a clear strain partitioning between the two constituents as well as a strain gradient from the αp/βtrans interface to the grain interior of αp.This activated a large number of geometrically necessary dislocations (GNDs) near the interface,mostly with <c+a> components,which contributed greatly to the extraordinary work-hardening abilities of bimodal microstructures in region Ⅰ.With increasing Tint,the αp/βtrans interface length density gradually increased and so was the density of GNDs with <c+a> components,which explained the continuous increase of uniform elongation with Tint in this region.For bimodal microstructures in region Ⅱ,where the nano-hardness ofβtrans and αp were comparable,neither a clear strain-partitioning tendency nor a strain gradient across the αp/βtrans interface was observed.Consequently,only statistically stored dislocations (SSDs) with <a>component were activated inside αp.The absence of <c+a> dislocations together with a decreased volume fraction of αp resulted into a dramatic loss of uniform elongation for bimodal microstructures in region Ⅱ.
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    Twin crystal structured Al-10 wt.％ Mg alloy over broad velocity conditions achieved by high thermal gradient directional solidification

    Luyan YangShuangming LiKai FanYang Li...
    152-162页
    查看更多>>摘要：Twin crystal structured Al-10 wt.％ Mg alloys that were grown over a broad solidification velocity range were prepared and studied for the first time.The high thermal gradient (G) and growth velocity (V) of directional solidification resulted in the dominant solidification of twins: the twinned dendrite trunks at constant high Vs curved in the G direction with large angles in 7 mm diameter crucibles and invaded regular columnar grains because of a distinct kinetics growth advantage.Transitive deceleration experiments were designed to produce twin crystals that evolved with lower values of V (100,10,and 0.5 μm/s) and had a structural coarsening trend.Twin cell growth in the absence of arms occurred at a growth velocity of 10 μm/s.A coherency loss was observed at a growth velocity of 0.5 μm/s with straight coherent twin boundaries turning into curved incoherent boundaries.Linear theoretical analyses were performed to understand the structural evolution of the twins.These results demonstrate the possibility of producing dense and controlled twin crystals in the Al-Mg system under most industrial production conditions;thus,this approach can be a new structural choice for designing Al-Mg-based alloys that have widespread commercial applications.
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    Grain-size gradient NiTi ribbons with multiple-step shape transition prepared by melt-spinning

    Xiangguang KongYing YangShiyu GuoRan Li...
    163-168页
    查看更多>>摘要：A grain-size gradient NiTi ribbon with multiple-step shape transition was papered by means of melt-spinning.The ribbons contain coarse and fine grains in the free surface side and copper roller surface side,respectively.The grain-size gradient microstructure induces a two-stage phase transformation behavior in the ribbons during heating or cooling.After tensile deformation pre-treatment,the ribbons exhibit a back-and-forth shape change (shape A→ B-A) upon a single heating or cooling process,resulting from the sequential phase transformation through the thickness of the ribbon as dictated by gradient grain size.The activating performance of the ribbons,i.e.shape transition amplitude and speed,can be customized by controlling the pre-deformation strain.This work offers a new opportunity for innovative designs to reach a novel shape memory behavior in NiTi alloys conveniently and efficiently.
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    Analysis on fluid permeability of dendritic mushy zone during peritectic solidification in a temperature gradient

    Peng PengJinmian YueAnqiao ZhangXudong Zhang...
    169-176页
    查看更多>>摘要：Compared with the growing applications of peritectic alloys,none research on the fluid permeability K of dendritic network during peritectic solidification has been reported before.The fluid permeability K of dendritic network in the mushy zone during directional solidification of Sn-Ni peritectic alloy was investigated in this study.Examination on the experimental results demonstrates that both the temperature gradient zone melting (TGZM) and Gibbs-Thomson (G-T) effects have obvious influences on the morphology of dendritic network during directional solidification.This is realized through different stages of liquid diffusion within dendritic mushy zone by these effects during directional solidification.The TGZM effect is demonstrated to play a more important role as compared with the G-T effect during directional solidification.Besides,it is shown that the evolution of dendrite network is more complex during peritectic solidification due to the involvement of the peritectic phase.Through the specific surface Sv,analytical expression based on the Carman-Kozeny model was proposed to analyze the fluid permeability of dendritic mushy zone in directionally solidified peritectic alloys.In addition,it is interesting to find a rise in permeability K after peritectic reaction in both theoretical predication and experimental results,which is different from that in other alloys.The theoretical predictions show that this rise in fluid permeability K after pedtectic reaction is caused by the remelting/resolidification process on dendritic structure by the TGZM and G-T effects during peritectic solidification.
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    Synergistic effect of chloride ion and Shewanella algae accelerates the corrosion of Ti-6Al-4V alloy

    Zhong LiJie WangYizhe DongDake Xu...
    177-185页
    查看更多>>摘要：The increasing utilization of titanium alloys in marine environments makes their microbiologically influenced corrosion study a timely matter.This work demonstrated that the corrosion of Ti-6Al-4V alloy was accelerated by a marine bacterium Shewanella algae in 2216E medium with different Cl level.Various electrochemical,pitting morphology and passive film analyses demonstrated that S.algae weakened the passive film,which made Cl-more aggressive.The synergy of those two factors caused considerable corrosion acceleration of the titanium alloy,leading to a maximum pit depth of 3.2 μm and corrosion current density of 26.5 nA cm-2 in 2216E medium with 3.50 ％ (w/w) Cl-.
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    Patternable production of SrTi03 nanoparticles using 1-W laser directly on flexible humidity sensor platform based on ITO/SrTiO3/CNT

    Le Thai DuyJi-Ye BaekYe-Ji MunHyungtak Seo...
    186-194页
    查看更多>>摘要：Perovskite oxides like SrTiO3 at the nanoscale are of interest for emerging applications,including high-k dielectrics and sensors.However,their synthesis requires long calcination at the elevated temperature,which is a barrier of their application to flexible electronics.Here,an effective laser-assisted sol-gel method to patternably produce SrTiO3 nanoparticles (-100 nm) in selective areas on polyimide substrates (coated with ITO) is introduced.Importantly,the violet-laser power is just 1 W but sufficient to crystallize the material in a short period (a few seconds).Furthermore,developing a flexible device platform using carbon nanotubes (CNT) and SrTiO3 nanoparticles for detection of humidity changes at room temperature is proposed.The sensor platform has both capacitive and resistive sensing abilities.The resistive mode with a lower power usage (about 0.2 μW) is suitable for long monitoring of humidity in the range of 2％ RH and above.The capacitive mode with higher sensitivity,faster response/recovery time (1-3 min),and lower detection limit (0.5％ RH) can be used for calibration purposes.The performance of the flexible sensor is still maintained after 5000 bending cycles at 1.5-cm radius.Altogether,our synthesis method and the flexible sensor show chances for mass-producing perovskite oxides at low cost for wearable electronics.
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    Simultaneously improving strength and ductility through laminate structure design in Mg-8.0Gd-3.0Y-0.5Zr alloys

    Jing LiMengjie ZhaoLi JinFenghua Wang...
    195-200页
    查看更多>>摘要：The laminate structure was applied to improve the mechanical properties of Mg-8.0Gd-3.0Y-0.5Zr alloys.Two types of laminate structures only with different distribution positions of fine grains were produced by friction-stir processing.Results show that the trilayer structure sample exhibits an excellent strengthductility synergy compared to the homogenous structure and bilayer structure.The enhanced mechanical properties are resulted from the hetero-deformation induced (HDI) stress strengthening and strain hardening which would be enhanced by increasing the quantity of interface.These observations suggest a crucial role of the number of interfaces in designing the laminate structure.
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