Effect of Laser Power on Microstructure and Micro-Galvanic Corrosion Behavior of a 6061-T6 Aluminum Alloy Welding Joints

doi:10.3390/met11010003

IMR OpenIR

	Effect of Laser Power on Microstructure and Micro-Galvanic Corrosion Behavior of a 6061-T6 Aluminum Alloy Welding Joints
	Zhou, Huiling 1; Fu, Fanglian 1; Dai, Zhixin 2; Qiao, Yanxin 1; Chen, Jian 1,3; Liu, Wen 1
Corresponding Author	Qiao, Yanxin(yxqiao@just.edu.cn) ; Chen, Jian(jchen496@uwo.ca)
	2021
Source Publication	METALS
Volume	11 Issue:1 Pages:8
Abstract	The 6061-T6 aluminum alloy welding joints were fabricated using gas metal arc welding (GMAW) of various laser powers, and the effect of laser power on the microstructure evolution of the welding joints was investigated. The corrosion behaviors of 6061-T6 aluminum alloy welding joints were investigated in 3.5 wt% NaCl solution using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The results showed that the micro-galvanic corrosion initiation from Mg2Si or around the intermetallic particles (Al-Fe-Si) is observed after the immersion test due to the inhomogeneous nature of the microstructure. The preferential dissolution of the Mg2Si and Al-Fe-Si is believed to be the possible cause of pitting corrosion. When the laser power reached 5 kW, the microstructure of the welded joint mainly consisted of Al-Fe-Si rather than the Mg2Si at 2 kW. The relatively higher content of Al-Fe-Si with increasing in laser power would increase the volume of corrosion pits.
Keyword	6061 aluminum alloy welding micro-galvanic corrosion intermetallic particles
Funding Organization	National Natural Science Foundation of China
DOI	10.3390/met11010003
Indexed By	SCI
Language	英语
Funding Project	National Natural Science Foundation of China[51975263] ; National Natural Science Foundation of China[51575252]
WOS Research Area	Materials Science ; Metallurgy & Metallurgical Engineering
WOS Subject	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS ID	WOS:000610490500001
Publisher	MDPI
Citation statistics	Cited Times:6[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/159018
Collection	中国科学院金属研究所
Corresponding Author	Qiao, Yanxin; Chen, Jian
Affiliation	1.Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Western Ontario, Dept Chem & Surface Sci Western, London, ON N6A 5B7, Canada
Recommended Citation GB/T 7714	Zhou, Huiling,Fu, Fanglian,Dai, Zhixin,et al. Effect of Laser Power on Microstructure and Micro-Galvanic Corrosion Behavior of a 6061-T6 Aluminum Alloy Welding Joints[J]. METALS,2021,11(1):8.
APA	Zhou, Huiling,Fu, Fanglian,Dai, Zhixin,Qiao, Yanxin,Chen, Jian,&Liu, Wen.(2021).Effect of Laser Power on Microstructure and Micro-Galvanic Corrosion Behavior of a 6061-T6 Aluminum Alloy Welding Joints.METALS,11(1),8.
MLA	Zhou, Huiling,et al."Effect of Laser Power on Microstructure and Micro-Galvanic Corrosion Behavior of a 6061-T6 Aluminum Alloy Welding Joints".METALS 11.1(2021):8.

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