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纳秒激光清洗6005A铝合金的焊接缺陷与力学性能

Welding Defect and Mechanical Properties of Nanosecond Laser Cleaning 6005A Aluminum Alloy.

作者信息

Zhang Yuelai, Yao Qi, Long Weifeng, Wang Chunming, Lin Ji, Liu Zehui

机构信息

CRRC Zhuzhou Locomotive Co., Ltd., Zhuzhou 412000, China.

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

出版信息

Materials (Basel). 2022 Nov 7;15(21):7841. doi: 10.3390/ma15217841.

DOI:10.3390/ma15217841
PMID:36363433
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9657713/
Abstract

Nanosecond laser cleaning effectively removes oxide film and dirt from the surface of aluminum body parts for rail transit, as well as improving surface properties. The effect of laser cleaning on the quality of weld was studied in detail for different scanning frequencies and cleaning speeds. The effect of post-weld laser cleaning on weld quality was investigated. After laser cleaning at different parameters, the surface oxygen content was decreased and the surface roughness and surface hardness were increased. Variation of surface oxygen content was related to energy density and spot density. The lowest oxygen content was obtained at 150 W, 100 Hz and 0.8 m/min. Laser-generated craters changed surface morphology and improved surface roughness. The mechanical properties of the welded joints were slightly improved, which relates to a decrease in porosity. The minimum porosity of the laser-cleaned weld was 0.021%. This work provides new ideas for the nanosecond laser cleaning of aluminum alloy and its welding properties.

摘要

纳秒激光清洗能有效去除轨道交通铝制车身部件表面的氧化膜和污垢，同时改善表面性能。针对不同的扫描频率和清洗速度，详细研究了激光清洗对焊接质量的影响。研究了焊后激光清洗对焊接质量的影响。在不同参数下进行激光清洗后，表面氧含量降低，表面粗糙度和表面硬度增加。表面氧含量的变化与能量密度和光斑密度有关。在150W、100Hz和0.8m/min时获得最低氧含量。激光产生的凹坑改变了表面形貌并提高了表面粗糙度。焊接接头的力学性能略有改善，这与孔隙率的降低有关。激光清洗焊缝的最小孔隙率为0.021%。这项工作为铝合金的纳秒激光清洗及其焊接性能提供了新思路。

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本文引用的文献

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Penetrating the oxide barrier in situ and separating freestanding porous anodic alumina films in one step.原位穿透氧化阻挡层并一步分离出独立的多孔阳极氧化铝薄膜。
Nano Lett. 2005 Apr;5(4):697-703. doi: 10.1021/nl0501112.
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Characterization of an effective cleaning procedure for aluminum alloys: surface enhanced Raman spectroscopy and zeta potential analysis.铝合金有效清洁程序的表征：表面增强拉曼光谱和zeta电位分析。
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