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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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    Enhanced strength-ductility combination in the aluminum-gold system by heterogeneous distribution of nanoparticles via ultra-severe plastic deformation and reactive interdiffusion

    Abbas MohammadiXavier SauvageFabien CuvillyKaveh Edalati...
    269-281页
    查看更多>>摘要：Ultrafine-grained aluminum alloys are of interest due to their high strength-to-weight ratio,but they usually suffer from poor uniform ductility.In this study,an Al-Au alloy with a good combination of strength and ductility is produced by the heterogeneous distribution of Al2Au nanoparticles in an alu-minum matrix.To generate such heterogeneity,the alloy is synthesized by ultra-severe plastic deforma-tion of aluminum and gold powders via the high-pressure torsion(HPT)method.Reactive interdiffusion occurs during the process leading to the heterogeneous formation of intermetallic particles and a good strength-ductility synergy(200 MPa yield stress and 15％uniform elongation).Nanoparticles gradually distribute within the matrix and once a uniform nanoparticle distribution is achieved,the alloy shows no further increase in strength,but it completely loses its ductility.It is concluded that not only the pres-ence of nanoparticles but more importantly the heterogeneity of their distribution can positively influ-ence the strength-ductility combination in ultrafine-grained aluminum alloys.The findings of this study suggest that future studies on heterogeneous precipitation hardening can be a solution to achieve ductile precipitation-hardened alloys.
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