中国激光, 2019, 46 (4): 0402003, 网络出版: 2019-05-09
6016和5182铝合金激光焊接接头的组织与织构 下载: 1342次
Microstructures and Textures of 6016 and 5182 Aluminum Laser Welded Joints
激光技术 织构 铝合金 激光填丝焊接 微观组织 laser technology texture aluminum alloy laser welding with wire microstructure
摘要
基于电子背散射衍射(EBSD)技术,对6016和5182铝合金在相同工艺条件下的激光填丝焊接接头的组织与织构进行分析研究。结果表明:6016和5182焊缝均由柱状晶与等轴晶组成,且柱状晶区域沿<100>方向均存在强烈的织构;焊接接头受成分过冷和异质形核的共同影响;6016铝合金接头受到异质形核的作用较大,等轴晶占比较大且晶粒取向呈随机分布的状态,柱状晶的主要织构为立方织构(<100>{001});5182铝合金接头受异质形核的影响不大,等轴晶存在沿<100>方向的织构,且主要由柱状晶构成,柱状晶的主要织构为纤维织构(<100>∥RD)、立方织构(<100>{001})和高斯织构(<100>{011})。
Abstract
The laser welding with wire is respectively carried out with 6016 and 5182 aluminum alloy plates to study the microstructure and texture under same welding process based on the electron backscattered diffraction (EBSD) technique. The results show that the weld seams of 6016 and 5182 alloys consist of columnar dendrites and equiaxed dendrites, and strong texture along the crystallographic direction <100> is observed in columnar dendrite area. The constitutional supercooling and heterogeneous nucleation have common effect on welded joints. Because the heterogeneous nucleation has large effect on the 6016 aluminum alloy joint, the ratio of the equiaxed dendrites in 6016 aluminum alloy is relatively large, the grain orientation randomly distributes, and the main texture of the columnar dendrites is cube texture (<100>{001}). While the heterogeneous nucleation has little effect on the 5182 aluminum alloy joint, the texture of the equiaxed dendrites distributes along <100> direction, the 5182 aluminum alloy joint is mainly consisted of the columnar dendrites, and the textures of the columnar dendrites are the fiber texture (<100>∥RD), cube texture (<100>{001}) and Goss texture (<100>{011}).
黄毅, 黄坚, 聂璞林. 6016和5182铝合金激光焊接接头的组织与织构[J]. 中国激光, 2019, 46(4): 0402003. Yi Huang, Jian Huang, Pulin Nie. Microstructures and Textures of 6016 and 5182 Aluminum Laser Welded Joints[J]. Chinese Journal of Lasers, 2019, 46(4): 0402003.