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钛合金与铝合金复合接头的搅拌摩擦焊

张振华, 沈以赴, 冯晓梅, 李博, 胡伟叶

张振华, 沈以赴, 冯晓梅, 李博, 胡伟叶. 钛合金与铝合金复合接头的搅拌摩擦焊[J]. 焊接学报, 2016, 37(5): 28-32.
引用本文: 张振华, 沈以赴, 冯晓梅, 李博, 胡伟叶. 钛合金与铝合金复合接头的搅拌摩擦焊[J]. 焊接学报, 2016, 37(5): 28-32.
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ZHANG Zhenhua, SHEN Yifu, FENG Xiaomei, LI Bo, HU Weiye. Dissimilar fiction stir welding of titanium alloy and aluminum alloy employing a modified butt joint configuration[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(5): 28-32.
Citation: ZHANG Zhenhua, SHEN Yifu, FENG Xiaomei, LI Bo, HU Weiye. Dissimilar fiction stir welding of titanium alloy and aluminum alloy employing a modified butt joint configuration[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(5): 28-32.
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钛合金与铝合金复合接头的搅拌摩擦焊

  • 1.

    南京航空航天大学材料科学与技术学院, 南京 210016

  • 2.

    中国航天科工集团南京晨光厂工艺研究所, 南京 210012

基金项目: 国家自然科学基金资助项目(51475232);江苏高校优势学科建设工程资助项目

Dissimilar fiction stir welding of titanium alloy and aluminum alloy employing a modified butt joint configuration

  • 1.

    College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

  • 2.

    Technology Research Institute of Nanjing Chenguang Group Co., Ltd (NCGC

摘要

    摘要
  • 摘要: 为了避免搅拌头轴肩磨损及防止根部未焊透工艺缺陷,设计一种Ti/Al复合式接头,采用组合式搅拌头偏置扎入TC4钛合金与5A06铝合金对接界面进行焊接,研究其搅拌摩擦焊(FSW)工艺及组织性能. 在最佳FSW工艺条件下,完成对Ti/Al异种接头的组织结构及机械拉伸性能分析. 结果表明,接头拉伸强度达到铝合金母材强度的88.3%,断裂主要发生在铝侧焊核区内. 根据对接界面的形貌特征分析,重点讨论了Ti/Al对接界面的形成机制,认为采用较低的搅拌头转速和较小的搅拌针钛侧偏置量,可获得焊接质量较高的Ti/AlFSW接头.
    Abstract: The present research employed a modified butt joint configuration into the FSW of TC4 titanium alloy and 5A06 aluminum alloy with an excess pin offset setup towards titanium alloy butt side, aiming to reduce the tool shoulder attrition, avoid butt root flaws, and study the effects of the process variables on the weld interfaces and tensile properties. Under the best FSW process condition, the examinations and analyses of macro/micro-structures, mechanical tensile properties of the dissimilar joints were conducted. The experiment results show that the joint mechanical tensile strength can reach 88.3 % of the parent aluminum alloy strength,and the tensile fracture path mainly within the stir nugget zone at aluminum alloy butt side. The formation mechanisms of the Ti/Al butt-welded interface structures were detailed according to the analyses of the characteristics at the butt interface. A high-quality Ti/Al FSW butt joint could be obtained when lower tool rotating speed and lower pin-offset value towards titanium alloy butt side were used.
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    • 参考文献(10)
  • [1] Simoncini M, Forcellese A. Effect of the welding parameters and tool configuration on micro-and macro-mechanical properties of similar and dissimilar FSWed joints in AA5754 and AZ31 thin sheets[J]. Materials and Design, 2012, 41: 50-60.
    [2] Osokin A A. Technological characteristics of the fusion welding of aluminum alloys to titanium alloys[J]. Welding Production, 1976, 23: 18-20.
    [3] Thomas W M, Nicholas E D, Needham J C, et al. Friction stir butt welding[P]. International Patent Application No. PCT/GB92/02203, 1991.
    [4] 张 海, 封小松, 刘仁培. 2219铝合金FSW-VPPA交叉焊缝组织与力学性能[J]. 焊接学报, 2012, 33(7): 77-80. Zhang Hai, Feng Xiaosong, Liu Renpei. Microstructure and mechanical properties of 2219 aluminum alloy intersection weld by FSW and VPPA[J]. Transactions of the China Welding Institution, 2012, 33(7): 77-80.
    [5] 周冠南, 沈以赴, 李 博, 等. 搅拌摩擦点焊下压量对界面畸变的影响[J]. 焊接学报, 2013, 34(9): 75-78. Zhou Guannan, Shen Yifu, Li Bo,et al. Effect of plunge depth on interface distortion in friction stir spot welding[J]. Transactions of the China Welding Institution, 2013, 34(9): 75-78.
    [6] Dressler U, Biallas G, Mercado U A. Friction stir welding of titanium alloy TiAl6V4 to aluminum alloy AA2024-T3[J]. Materials Science and Engineering A, 2009, 526: 113–117.
    [7] Chen Y, Ni Q, Ke L. Interface characteristic of friction stir welding lap joints of Ti/Al dissimilar alloys[J]. Transactions of Nonferrous Metals Society of China, 2012, 22: 299-304.
    [8] Chen Y C, Nakata K. Microstructural characterization and mechanical properties in friction stir welding of aluminum and titanium dissimilar alloys[J]. Materials and Design, 2009, 30: 469-474.
    [9] Nandan R, DebRoy T, Bhadeshia H. Recent advances in friction-stir welding-Process, weldment structure and properties[J]. Progress in Materials Science, 2008, 53: 980-1023.
    [10] Edwards P, Ramulu M. Peak temperatures during friction stir welding of Ti–6Al–4V[J]. Science and Technology of Welding and Joining, 2010, 15: 468-72.
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  • 收稿日期:  2013-10-01

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