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不扎透上板对2024-T4铝合金搅拌摩擦搭接焊力学性能的影响

叶结和1,刘雪松2,王素环1

叶结和1,刘雪松2,王素环1. 不扎透上板对2024-T4铝合金搅拌摩擦搭接焊力学性能的影响[J]. 焊接学报, 2018, 39(2). DOI: 10.12073/j.hjxb.2018390044
引用本文: 叶结和1,刘雪松2,王素环1. 不扎透上板对2024-T4铝合金搅拌摩擦搭接焊力学性能的影响[J]. 焊接学报, 2018, 39(2). DOI: 10.12073/j.hjxb.2018390044

不扎透上板对2024-T4铝合金搅拌摩擦搭接焊力学性能的影响

  • 摘要: 钩状缺陷是影响搅拌摩擦搭接焊接头性能的重要因素. 为了尽可能的避免钩状缺陷的产生,利用不扎透上板的方式对2024-T4铝合金进行焊接,重点分析不同转速下的接头横截面形貌及力学性能. 结果表明,利用不扎透上板的方式所得搭接界面保持连续且主要呈水平方向分布. 由于搅拌针长度较小,焊核区底部的宽度远大于搅拌针尖端直径,使有效连接宽度增加,导致搭接接头在承受拉剪载荷时呈拉伸断裂模式. 与转速为500 r/min相比,600 r/min下接头的有效连接宽度与剪切拉伸强度均有小幅度地增加,最大剪切拉伸强度为143 MPa.
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  • 收稿日期:  2017-09-23

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