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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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    Understanding grain refining and anti Si-poisoning effect in Al-10Si/Al-5Nb-B system

    Yang LiYing JiangBin LiuQun Luo...
    190-201页
    查看更多>>摘要：Grain refinement is critical for fabricating high-quality Al-Si casting components in the application of automobile and aerospace industries,while the well-known Si-poisoning effect makes it difficult.Nbbased refiners offer an effective method to refine Al-Si casting alloys,but their anti Si-poisoning capability is far from being understood.In this work,the grain refining mechanism and the anti Si-poisoning effect in the Al-10Si/Al-5Nb-B system were systematically investigated by combining transmission electron microscope,first-principles calculations,and thermodynamic calculations.It is revealed that NbB2 provides the main nucleation site in the Al-10Si ingot inoculated by 0.1 wt.％Nb Al-5Nb-B refiner.The exposed Nb atoms on the (0001) NbB2 and (1-100) NbB2 surface can be substituted by Al to form (Al,Nb)B2 intermedia layers.In addition,a layer of NbAl3-like compound (NbAl3') can cover the surface of NbB2 with the orientation relation of(1-100)[11-20]NbB2//(110)[110]NbAl3'.Both of the (Al,Nb)B2 and NbAl3'intermedia layers contribute to enhancing the nucleation potency of NbB2 particles.These discoveries provide fundamental insight to the grain refining mechanism of the Nb-B based refiners for Al-Si casting alloys and are expected to guide the future development of stronger refiners for Al-Si casting alloys.
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    Supermodulus effect by grain-boundary wetting in nanostructured multilayers

    Jing wangLu HanXiaohu LiDongguang Liu...
    202-209页
    查看更多>>摘要：The effect of thermal treatments on mechanical properties was systematically investigated in Ni/Mo multilayers with a constant modulation period (160 nm) prepared by magnetron sputtering deposition.A supermodulus effect was found in the annealed multilayers as compared to the as-deposited state.A large tensile stress development was observed in the multilayers.The evolution of grain-boundary (GB) wetting was observed at the interfaces of the multilayers,which results in an enhanced modulus based on the mechanism of GB-wetting-induced interfacial stress/strain.The GB wetting phenomenon was further supported by a thermodynamic calculation.The results not only bring clear evidence of the important role of interracial structures in governing the elastic behavior of metallic multilayers,but also allow designing the multilayers with special properties through atomic diffusion and wetting at the interfaces based on the thermodynamic calculation.
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    Simultaneous enhancement in strength and ductility of Fe50Mn30Co10Cr10 high-entropy alloy via nitrogen alloying

    Yu HanHuabing LiHao FengKemei Li...
    210-215页
    查看更多>>摘要：The effect of nitrogen on microstructural evolution and tensile properties of transformation-induced plasticity (TRIP) Fe50Mn30Co10Cr10 HEAs was investigated.Nitrogen was fully introduced in solid solution by pressure-induced melting technique.Nitrogen addition turned the TRIP alloy to a twinning-induced plasticity (TWlP) alloy,and simultaneously improved the strength and elongation.For the nitrogen-doped HEA,the high yield strength is mainly resulted from the friction stress via interstitial strengthening effect,and the high ductility is originated from retained high strain-hardening capability via the successive onset of dislocation accumulation and deformation twinning.The strain-hardening behavior and microstructural evolution at specified strains were revealed.
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    Faceted Kurdjumov-Sachs interface-induced slip continuity in the eutectic high-entropy alloy, AlCoCrFeNi2.1

    Ting XiongWenfan YangShijian ZhengZhaorui Liu...
    216-227页
    查看更多>>摘要：Recently,the eutectic high-entropy alloy (EHEA),AlCoCrFeNi2.1,can reach a good balance of strength and ductility.The dual-phase alloy exhibits a eutectic lamellar microstructure with large numbers of interfaces.However,the role of the interfaces in plastic deformation have not been revealed deeply.In 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 morphologies.There exist three kinds of interfaces in the EHEA,namely,(321)B2]](112)FCC,(01(1))B2‖(33(2))FCC,and (23(1))FCC‖(552)FCC.The dominating (321)FCC‖(112)Fcc interface and the secondary (01(1))B2‖(33(2))FCC interface are both non-slip planes and atomistic-scale faceted,facilitating the nucleation and slip transmission of the dislocations.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) theory.In 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 factor.Moreover,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.
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    In-situ microstructural investigations of the TRIP-to-TWIP evolution in Ti-Mo-Zr alloys as a function of Zr concentration

    Bingnan QianJinyong ZhangYangyang FuFan Sun...
    228-237页
    查看更多>>摘要：Aiming at overcoming the strength-ductility trade-off in structural Ti-alloys,a new family of TRIP/TWIP Ti-alloys was developed in the past decade (TWIP: twinning-induced plasticity;TRIP: transformationinduced plasticity).Herein,we study the tunable nature of deformation mechanisms with various TWIP and TRIP contributions by fine adjustment of the Zr content on ternary Ti-12Mo-xZr (x =3,6,10) alloys.The microstructure and deformation mechanisms of the Ti-Mo-Zr alloys are explored by using in-situ electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM).The results show that a transition of the dominant deformation mode occurred,going from TRIP to TWIP major mechanism with increasing Zr content.In the Ti-12Mo-3Zr alloy,the stress-induced martensitic transformation (SIM) is the major deformation mode which accommodates the plastic flow.Regarding the Ti-12Mo-6Zr alloy,the combined deformation twinning (DT) and SIM modes both contribute to the overall plasticity with enhanced strain-hardening rate and subsequent large uniform ductility.Further increase of the Zr content in Ti-12Mo-10Zr alloy leads to an improved yield stress involving single DT mode as a dominant deformation mechanism throughout the plastic regime.In the present work,a set of comprehensive in-situ and ex-situ microstructural investigations clarify the evolution of deformation microstructures during tensile loading and unloading processes.
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