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6016和5182铝合金激光焊接接头的组织与织构

Microstructures and Textures of 6016 and 5182 Aluminum Laser Welded Joints

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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}).

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中图分类号:TG456.7

DOI:10.3788/cjl201946.0402003

所属栏目:激光制造

收稿日期:2018-10-10

修改稿日期:2018-12-04

网络出版日期:2019-01-08

作者单位    点击查看

黄毅:上海交通大学上海市激光制造与材料改性重点实验室, 上海 200240
黄坚:上海交通大学上海市激光制造与材料改性重点实验室, 上海 200240
聂璞林:上海交通大学上海市激光制造与材料改性重点实验室, 上海 200240

联系人作者:黄坚(jhuang@sjtu.edu.cn)

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引用该论文

Huang Yi,Huang Jian,Nie Pulin. Microstructures and Textures of 6016 and 5182 Aluminum Laser Welded Joints[J]. Chinese Journal of Lasers, 2019, 46(4): 0402003

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

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