压印接头典型失效形式及机理
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昆明理工大学机电工程学院

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TG453

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Typical Failure Modes and Mechanisms of Clinched Joints
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    摘要:

    选取1420 铝锂合金(1420)和镀锌钢进行不同组合压印连接ꎬ对所得接头进行静态力学性能试
    验ꎬ并运用扫描电子显微镜对接头拉伸断口进行微观分析ꎮ 结果表明:镀锌钢-1420 接头的静拉伸强度和能量
    吸收值最大(3 119.3 Nꎬ4.757 J)ꎻ1420-1420 接头最小(2 243.4 Nꎬ0.598 J)ꎮ 1420-1420 接头为颈部断裂失效ꎬ
    镀锌钢-镀锌钢接头为混合失效ꎬ两种接头同时存在韧性断裂和脆性断裂两种特征ꎻ镀锌钢-1420 接头为上板
    拉脱失效ꎬ接头断口为韧性断裂ꎮ

    Abstract:

    Selecting 1420 aluminum lithium alloy and galvanized steelꎬthe technology of clinching was applied to
    join the single lap ̄jointed joints in different sequence.The static mechanical behavior text were carried out to examine
    the mechanical behavior of 1420-1420ꎬgalvanized steel-1420 and galvanized steel ̄galvanized steel joints.Scanning e ̄
    lectron microscope was used to analyze the tensile fracture of the joints.It can be seen from experiments that the ten ̄
    sile ̄shear strength and energy absorption of galvanized steel-1420 joint are the biggest (3 119.3 Nꎬ4.757 J)ꎬ and
    much greater than that of 1420-1420 joints(2 243.403 Nꎬ0.598 J).The failure modes of 1420-1420 joints are neck ̄
    fractureꎬthe failure modes of galvanized steel ̄galvanized steel joints are mixed failure.Microscopic analysis showed that
    the two type of joints both had cleavage and dimple morphological features.The failure modes of galvanized steel-1420
    joints are button separationꎬthe fracture of joints are ductile fracture

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高爱凤 何晓聪 张 越 余童欣.压印接头典型失效形式及机理[J].宇航材料工艺,2016,46(3).

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  • 在线发布日期: 2016-11-28
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