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    张昭

    • 教授     博士生导师   硕士生导师
    • 主要任职:Professor in Process Mechanics
    • 性别:男
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:工程力学系
    • 学科:制造工艺力学. 工程力学. 计算力学
    • 办公地点:综合实验1号楼619
    • 联系方式:0411-84708432
    • 电子邮箱:zhangz@dlut.edu.cn

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    INTEGRATED MODELLING OF TOOL WEAR AND MICROSTRUCTURAL EVOLUTION INTERNAL RELATIONS IN FRICTION STIR WELDING WITH WORN PIN PROFILES

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    论文类型:期刊论文

    第一作者:Zhang, Zhao

    通讯作者:Zhang, Z (reprint author), Dalian Univ Technol, Dept Engn Mech, 2 Linggong Rd, Dalian 116024, Peoples R China.

    合写作者:Tan, Zhijun

    发表时间:2019-07-01

    发表刊物:JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES

    收录刊物:SCIE

    卷号:14

    期号:4

    页面范围:537-548

    ISSN号:1559-3959

    关键字:friction stir welding; wear; Monte Carlo

    摘要:An adaptive remeshing model was coupled with the Archard equation to calculate the tool wear in friction stir welding (FSW). The Monte Carlo method was used to simulate recrystallization in FSW with worn tools. In addition, experiments were used to validate the predicted temperatures and microstructures. As indicated by the results, appropriate tool wear can lead to self-optimization of the tool in FSW. This wear mechanism is controlled by the change in the average strain rate during the FSW process. The average strain rate first increases and then decreases with tool wear, which is the key factor when determining the final grains. An appropriate amount of tool wear can lead to smaller grains in the stirring zone of FSW whereas excess tool wear can lead to larger grains.