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文摘
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成功实现了2A14-T6高强铝合金的双轴肩搅拌摩擦焊,获得了表面成形良好,无内部缺陷的优质接头. 试验发现,在焊缝的焊核内存在一个由上、下轴肩和搅拌针所驱动的材料塑性流动交汇区,该交汇区靠近焊缝下表面. 微观分析表明,焊核上部的晶粒尺寸要小于其中部和下部的晶粒尺寸. 焊缝各区的块状第二相在焊接中发生了溶解和粗化,导致接头内出现了宽度近乎轴肩直径二倍的软化区; 焊缝各层硬度分布接近,没有出现常规搅拌摩擦焊中常见的接头各层异性现象. 经拉伸测试证实,双轴肩焊接接头的强度系数达到了71%,拉伸时断在了焊核内的材料流动交汇区处. |
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其他语种文摘
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A 2A14-T6 aluminum alloy was successfully bobbin tool friction stir welded. The defect-free sound joint with good surface and inner formation was produced. It was found that a converging zone of material plastic flow,composed of upperand lower-shoulder-driven flows as well as pin-driven flow,was formed at the lower part of weld nugget zone. Microstructural analysis indicated that the grain size of the upper part was smaller than that of the middle and lower parts in the weld nugget zone. A softening region,whose width was approximately twice that of the shoulder diameter,was formed in the joint due to the coarsening and dissolution of the block-shaped second phases. The hardness distributions of the three layers of the joint were nearly the same,indicating that the heterogeneity of joint properties commonly occurred in conventional friction stir welding was not present in bobbin tool friction stir welding. The tensile test results showed that the strength efficiency of the bobbin tool friction stir welded joint can reach 71%. The joint was fractured through the converging zone of material flow in the weld nugget zone. |
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来源
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焊接学报
,2015,36(12):65-68,104 【核心库】
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关键词
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高强铝合金
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双轴肩搅拌摩擦焊
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焊缝成形
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微观组织
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力学性能
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地址
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中国科学院沈阳自动化研究所, 机器人学国家重点实验室, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-360X |
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学科
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金属学与金属工艺 |
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基金
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国家重大科技专项
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文献收藏号
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CSCD:5621419
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1.
Marie F. Investigation on bobbin tool friction stir welding of 2000 series aluminum thin sheets.
7th International Symposium on Friction Stir Welding,2008:20-22
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被引
1
次
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|
|
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2.
Marie F. Development of the bobbin tool technique on various aluminum alloys.
5th International Symposium on Friction Stir Welding,2004:14-16
|
被引
1
次
|
|
|
|
|
3.
张健. 2219-T4铝合金双轴肩FSW与常规FSW接头性能对比研究.
焊接,2008(11):50-52
|
被引
9
次
|
|
|
|
|
4.
赵衍华. 2219铝合金双轴肩搅拌摩擦焊接头组织与性能分析.
宇航材料工艺,2012(6):70-75
|
被引
6
次
|
|
|
|
|
5.
邢丽. 铝合金LD10的搅拌摩擦组织及性能分析.
焊接学报,2002,23(6):55-58
|
被引
30
次
|
|
|
|
|
6.
Lin S B. Integral and layered mechanical properties of friction stir welded joints of 2014 aluminum alloy.
Materials Science and Technology,2006,22(8):995-998
|
被引
3
次
|
|
|
|
|
7.
周鹏展. 2219-T87厚板搅拌摩擦焊沿厚度方向的性能差异.
焊接学报,2007,28(10):5-8
|
被引
13
次
|
|
|
|
|
8.
董继红. 常规FSW与双轴肩FSW对铝合金接头组织和性能的影响.
焊接学报,2013,34(7):85-88
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被引
5
次
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