Fatigue Properties and Fracture Behavior of 5052 Aluminum Alloys Welded by High Frequency Micro-Vibration Laser

Wei Zhang; Qinghua Lu; Xinhuai Ren; Yongzhen Bai; Jiewen Jin; Yangling Ou

doi:10.3788/CJL201946.0302012

Chinese Journal of Lasers, Volume. 46, Issue 3, 0302012(2019)

Fatigue Properties and Fracture Behavior of 5052 Aluminum Alloys Welded by High Frequency Micro-Vibration Laser

Wei Zhang^1、*, Qinghua Lu^1,2、*, Xinhuai Ren¹, Yongzhen Bai¹, Jiewen Jin¹, and Yangling Ou¹

Author Affiliations

¹ College of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

² Shanghai Research and Development Center for Key Technologies of Ultra-Intense Laser Processing,Shanghai University of Engineering Science, Shanghai 201620, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(10)

Fig. 1. Schematic of experimental platform for high frequency micro-vibration laser welding

Download full size

Fig. 2. Schematic of residual stress test point and fatigue sample

Download full size

Fig. 3. Microstructures at fusion lines. (a) Weld fusion line 1; (b) weld fusion line 5

Download full size

Fig. 4. Residual stress of double-line welded sheet

Download full size

Fig. 5. S-N curves of base metal and double-line sample

Download full size

$BM fatigue fracture morphology of 5052 aluminum alloy. (a) Fracture morphology and position diagram; (b) fatigue step; (c) secondary crack; (d) dimple$

Fig. 6. BM fatigue fracture morphology of 5052 aluminum alloy. (a) Fracture morphology and position diagram; (b) fatigue step; (c) secondary crack; (d) dimple

Download full size

$Fatigue fracture morphologies of welded joints. (a) Fracture of multiple fatigue sources; (b) fracture of single fatigue source; (c) hole; (d) fatigue striations; (e) crack tip junctions$

Fig. 7. Fatigue fracture morphologies of welded joints. (a) Fracture of multiple fatigue sources; (b) fracture of single fatigue source; (c) hole; (d) fatigue striations; (e) crack tip junctions

Download full size

Table 1. Chemical compositions of 5052 aluminum alloy
View table
Table 1. Chemical compositions of 5052 aluminum alloy
Element Si Fe Mn Mg Ti other Al
Mass fraction /% 0.4 0.2 0.15 2.0 0.15 0.15 Bal.

Table 2. Parameters for test (P=5 kW; v=0.03 m/s; DDA=-15 mm)

View table

Table 2. Parameters for test (P=5 kW; v=0.03 m/s; DDA=-15 mm)

No. of plate(weld number/weld number)	Weld line 1		Weld line 2
No. of plate(weld number/weld number)	Frequency /Hz	Acceleration /(m·s^-2)	Frequency /Hz	Acceleration /(m·s^-2)
A(1/2)	0	0	545	66.5
B(3/4)	0	0	967	33.4
C(5/6)	550	92.2	970	34.3
D(7/8)	0	0	0	0
E(9/10)	549	77	545	52.5
F(11/12)	977	54.1	976	94

Table 3. Residual stress and fatigue strength coefficient
View table
Table 3. Residual stress and fatigue strength coefficient
Sample A B C E F
Fatigue strength coefficient b 0.107 0.114 0.072 0.096 0.069
Residual stress of fracture weld /MPa 297.5 321 196.5 238.5 240.5

Tools

Get Citation

Copy Citation Text

Wei Zhang, Qinghua Lu, Xinhuai Ren, Yongzhen Bai, Jiewen Jin, Yangling Ou. Fatigue Properties and Fracture Behavior of 5052 Aluminum Alloys Welded by High Frequency Micro-Vibration Laser[J]. Chinese Journal of Lasers, 2019, 46(3): 0302012

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites