东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (10): 1422-1426.DOI: 10.12068/j.issn.1005-3026.2014.10.013

• 材料与冶金 • 上一篇    下一篇

多道次搅拌摩擦加工对5083-O铝合金组织性能的影响

陈雨1,李晓华2,付明杰2,丁桦1   

  1. (1 东北大学 材料与冶金学院, 辽宁 沈阳110819;2 中航工业北京航空制造工程研究所, 北京100024)
  • 收稿日期:2013-11-18 修回日期:2013-11-18 出版日期:2014-10-15 发布日期:2014-05-19
  • 通讯作者: 陈雨
  • 作者简介:陈雨(1989-),男,辽宁沈阳人,东北大学博士研究生;丁桦(1958-),女,安徽合肥人,东北大学教授,博士生导师.
  • 基金资助:
    航空支撑项目(61901110301).

Effect of Multipass Friction Stir Processing on Microstructures and Mechanical Properties of 5083O Aluminum Alloy

CHEN Yu1, LI Xiaohua2, FU Mingjie2, DING Hua1   

  1. 1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China; 2. AVIC Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China.
  • Received:2013-11-18 Revised:2013-11-18 Online:2014-10-15 Published:2014-05-19
  • Contact: DING Hua
  • About author:-
  • Supported by:
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摘要: 在不同轴肩直径、搅拌头转速和搅拌头行进速度下,对27mm厚5083-O铝合金进行了多道次搅拌摩擦加工(multipassfrictionstirprocessing),搭接率为100%,共进行3道次搅拌摩擦加工.研究结果表明,加工区由细小的再结晶组织组成;随着加工道次的增加,加工区内部缺陷体积减少,晶粒进一步细化,析出相细化并均匀分布,力学性能提高,加工区最高抗拉强度可达360MPa,延伸率也优于母材;其中,第二道次加工对材料组织和性能的影响最为明显.

关键词: 多道次, 搅拌摩擦加工, 5083-O铝合金, 微观组织, 力学性能

Abstract: Multipass friction stir processing (3pass FSP with 100% overlap) was conducted under different diameters of shoulders, rotation speeds and travel speeds to investigate the effect of processing parameters on the microstructures and the mechanical properties of 5083O aluminum alloy. The results showed that the fine and dynamically recrystallized grains are observed in the FSP zone. With increasing the number of passes, the grain size and the tunnel defects decrease, the second phase particles are refined and distributed uniformity, the ultimate tensile strength reaches up to 360 MPa, and the elongation is higher than that of the base metal. The effect of the 2ndpass on the microstructures and mechanical properties is most obvious.

Key words: multipass, friction stir processing, 5083O aluminum alloy, microstructure, mechanical property

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