高级检索

焊接参数对7A04铝合金搅拌摩擦焊接头组织与力学性能的影响

郑小茂, 张大童, 张文, 邱诚

郑小茂, 张大童, 张文, 邱诚. 焊接参数对7A04铝合金搅拌摩擦焊接头组织与力学性能的影响[J]. 焊接学报, 2016, 37(1): 76-80.
引用本文: 郑小茂, 张大童, 张文, 邱诚. 焊接参数对7A04铝合金搅拌摩擦焊接头组织与力学性能的影响[J]. 焊接学报, 2016, 37(1): 76-80.
shu
ZHENG Xiaomao, ZHANG Datong, ZHANG Wen, QIU Cheng. Effect of processing parameters on microstructure and mechanical properties of friction stir welded 7A04 aluminum alloy joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(1): 76-80.
Citation: ZHENG Xiaomao, ZHANG Datong, ZHANG Wen, QIU Cheng. Effect of processing parameters on microstructure and mechanical properties of friction stir welded 7A04 aluminum alloy joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(1): 76-80.
shu

焊接参数对7A04铝合金搅拌摩擦焊接头组织与力学性能的影响

  • 华南理工大学 国家金属材料近净成形工程技术中心, 广州 510640

基金项目: 中央高校基本科研业务费专项资金资助项目(2014ZG0028)

Effect of processing parameters on microstructure and mechanical properties of friction stir welded 7A04 aluminum alloy joints

  • School of Mechanical and Automotive Engineering, National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China

摘要

    摘要
  • 摘要: 采用不同的焊接参数对3 mm厚7A04铝合金板进行焊接,并对接头的组织、沉淀相、力学性能及断口形貌进行了分析. 结果表明,焊核区组织发生动态再结晶,形成细小的等轴晶粒,热影响区晶粒发生明显粗化. TEM分析结果显示,经搅拌摩擦焊后,焊核区部分沉淀相溶解. 焊核区晶粒尺寸随焊接速度增大而减小. 当焊接速度为120 mm/min,旋转速度为800 r/min时,接头强度达到最大值 454.2 MPa,为母材的95%,断后伸长率为3.97%,为母材的70%. 硬度测试显示搅拌摩擦焊接头发生软化,焊缝区域硬度低于母材,硬度值最低点出现在热影响区;拉伸断口形貌SEM图像表明接头断裂方式为韧性和脆性混合型断裂.
    Abstract: 7A04 aluminum plates with a thickness of 3mm were welded by friction stir welding (FSW). The microstructure, precipitates mechanical properties and fractured surfaces of the joints were investigated. The results show that the microstructure of the nugget zone consists of fine equiaxed grains due to dynamic recrystallization with precipitates dissolved,and the average grain size of the nugget zone decreases with welding speed increasing. According to the microhardness test, the hardness of the nugget zone is lower than that of the parent material and the lowest hardness locates at HAZ. The ultimate tensile strength (UTS) reaches its peak value (454.2 MPa), at a welding speed of 120 mm/min, which is 95% of the parental material. The elongation of the joint is 3.97% under this parameter. The SEM observed fracture morphologies indicate that the joint fails through a mixture ductile and brittle mode.
    • HTML全文
    • 参考文献(12)
  • [1] 王祝堂, 田荣璋. 铝合金及其加工手册[M]. 长沙: 中南工业大学出版社, 1996.
    [2] 刘静安. 研制超高强铝合金材料的新技术及其发展趋势[J]. 铝加工, 2004, 154(1): 9-13. Liu Jing'an, The new technology for development of ultra-high-strength aluminum alloy materials and its developing tendency[J]. Aluminum Fabrication. 2004, 154(1): 9-13.
    [3] Mishra R S, Ma Z Y. Friction stir welding and processing[J]. Materials Science and Engineering: R: Reports, 2005, 50(1): 1-78.
    [4] 张 华, 林三宝, 吴 林, 等. 搅拌摩擦焊研究进展及前景展望[J]. 焊接学报, 2003, 24(3): 91-96. Zhang Hua, Lin Sanbao, Wu Lin, et al. Current progress and prospect of friction stir welding[J]. Transactions of the China welding institution, 2003, 24(3): 91-96.
    [5] Su J Q, Nelson T W, Mishra R, et al. Microstructural investigation of friction stir welded 7050-T651 aluminium[J]. Acta Materialia, 2003, 51(3): 713-729.
    [6] Mahoney M W, Rhodes C G, Flintoff J G, et al. Properties of friction-stir-welded 7075 T651 aluminum[J]. Metallurgical and Materials Transactions A, 1998, 29(7): 1955-1964.
    [7] 傅志红, 贺地求, 周鹏展, 等. 7A52铝合金搅拌摩擦焊焊缝的组织分析[J]. 焊接学报, 2006, 27(5): 65-68. Fu Zhihong, He Diqiu, Zhou Zhanpeng, et al. Structure investigation of friction stir welding of 7A52 aluminum alloy[J]. Transactions of the China welding institution, 2006, 27(5): 65-68.
    [8] 赵军军, 张 平, 王卫欣, 等. 7A52铝合金搅拌摩擦焊的焊缝成形[J]. 焊接学报, 2005, 26(5): 61-64. Zhao Junjun, Zhang Ping, Wang Weixin, et al. Weld bead shaping of friction stir welded 7A52 aluminum alloy[J]. Transactions of the China welding institution, 2005, 26(5): 61-64.
    [9] 梁志芳, 史清宇, 康 旭. 7A52铝合金搅拌摩擦焊工艺优化[J]. 焊接学报, 2011, 32(2): 17-20. Liang Zhifang, Shi Qingyu, Kang Xu. Friction stir welding process parameter optimization of 7A52 aluminum alloy[J]. Transactions of the China welding institution, 2011, 32(2): 17-20.
    [10] 王希靖, 孙桂苹, 张 杰, 等. 焊后热处理对高强铝合金搅拌摩擦焊接头的影响 [J]. 中国有色金属学报, 2009, 19(3): 484-489. Whang Xijing, Sun Guiping, Zhang Jie, et al. Effects of high-strength aluminum alloy[J]. The Chinese Journal of Nonferrous Metals. 2009, 19(3): 484-489.
    [11] Mahoney M W. Friction stir welding for aluminum aerospace structure[J]. Welding and Joining, 1997(1/2): 18-20.
    [12] Seidel T U, Reynolds A P. Visualization of the material flow in AA2195 friction-stir welds using a marker insert technique[J]. Metallurgical and materials Transactions A, 2001, 32(11): 2879-2884.
    • 相关文章
    • 施引文献
    • 资源附件(0)
计量
  • 文章访问数:  930
  • HTML全文浏览量:  12
  • PDF下载量:  684
  • 被引次数: 0
出版历程
  • 收稿日期:  2014-03-30

目录

摘要
HTML全文
    参考文献(12)
    相关文章
    施引文献
    资源附件(0)

    /

    返回文章
    返回

    网站版权 © 焊接杂志社焊接学报编辑部电话：0451-86323218地址：哈尔滨市松北区创新路2077号

    本系统由 北京仁和汇智信息技术有限公司 开发  百度统计