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    郑勇刚

    • 教授     博士生导师   硕士生导师
    • 主要任职:力学与航空航天学院副院长
    • 其他任职:工程力学系副主任(分管本科生、研究生培养)
    • 性别:男
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:力学与航空航天学院
    • 学科:工程力学. 计算力学. 生物与纳米力学
    • 办公地点:一号综合实验楼626房间
    • 电子邮箱:zhengyg@dlut.edu.cn

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    Vibration-Induced Property Change in the Melting and Solidifying Process of Metallic Nanoparticles

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    论文类型:期刊论文

    第一作者:Zheng, Yonggang

    通讯作者:Chen, Z (reprint author), Dalian Univ Technol, Dept Engn Mech, Int Res Ctr Computat Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China.; Chen, Z (reprint author), Univ Missouri, Dept Civil & Environm Engn, Columbia, MO 65211 USA.

    合写作者:Ding, Liquan,Ye, Hongfei,Chen, Zhen

    发表时间:2017-04-26

    发表刊物:NANOSCALE RESEARCH LETTERS

    收录刊物:SCIE、EI、PubMed

    卷号:12

    期号:1

    页面范围:308

    ISSN号:1556-276X

    关键字:Additive manufacturing; Nanoparticles; Molecular dynamics

    摘要:Tuning material properties in the 3-D printing process of metallic parts is a challenging task of current interests. Much research has been conducted to understand the effects of controlling parameters such as the particle geometry (size and shape), heating, and cooling ways on the outcome of the printing process. However, nothing has been done to explore the system vibration effect. This letter reports our findings on the vibration-induced property change in the melting and solidifying process of silver nanoparticles with the use of molecular dynamics simulation. We find that the increase of system vibration magnitude would increase the number fraction of disordered atoms, which in turn changes the nanostructure of solidified products. For a given system vibration magnitude, the number fraction of disordered atoms reaches the maximum around the system natural frequency so that the stiffness of solidified products becomes the minimum. Since this trend is not affected by the system size, the above findings reveal a feasible path toward the real-time tuning of material properties for advancing additive manufacturing.