Mechanical Properties of Laser Overlap Welded Joints of Stainless Steel Sheets

Hang Liang; Ying Kan; Yunlu Jiang; Huaining Chen

doi:10.3788/CJL201845.0602001

Chinese Journal of Lasers, Volume. 45, Issue 6, 0602001(2018)

Mechanical Properties of Laser Overlap Welded Joints of Stainless Steel Sheets

Hang Liang^1,2, Ying Kan¹, Yunlu Jiang¹, and Huaining Chen^1、*

¹ Department of Material Special Preparing and Processing Technology, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China

² School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, Liaoning 110016, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(18)

Fig. 1. Schematic of experimental setup

Download full size

Fig. 2. Schematic of specimen preparation

Download full size

Fig. 3. Schematic of weld morphology

Download full size

Fig. 4. (a) Surface morphology of 3-1# joint; (b) cross section of 3-1# weld; (c) surface morphology of 2# joint; (d) cross section of 2# weld

Download full size

Fig. 5. Fatigue test curves of specimens with different widths. (a) 1#; (b) 2#

Download full size

Fig. 6. Tensile-shear test results of non-penetration joints

Download full size

Fig. 7. Fatigue performance test results of non-penetration joint with a width of 80 mm

Download full size

$Shear-fracture morphologies of different specimens. (a) 3-1#; (b) 3-2#; (c) 3-3#$

Fig. 8. Shear-fracture morphologies of different specimens. (a) 3-1#; (b) 3-2#; (c) 3-3#

Download full size

Fig. 9. Weld toe shapes of different specimens. (a) 3-1#; (b) 3-2#; (c) 3-3#

Download full size

Fig. 10. Schematics of stress on weld toes with different shapes. (a) 3-1#; (b) 3-2#; (c) 3-3#

Download full size

Fig. 11. Tensile performance test results of joints with different base metals

Download full size

Fig. 12. Fatigue performance test results of joints with different base metals

Download full size

Table 1. Chemical compositions of SUS301L plate (mass fraction, %)
View table
Table 1. Chemical compositions of SUS301L plate (mass fraction, %)
Element C Si Mn P S Ni Cr N Fe
Value 0.02 0.43 1.08 0.04 0.003 7.10 17.70 0.02 Bal.

Table 2. Mechanical properties of SUS301L plate
View table
Table 2. Mechanical properties of SUS301L plate
Materialtype Yieldstrength /MPa Tensilestrength /MPa Elongation /% Fatiguelimit /MPa
DLT >350 >700 43.2 265.8
ST >420 >770 35.0 287.5
MT >420 >420 30.0 319.2
HT >700 >950 27.4 359.0
2G >350 >750 35.0 300.0

Table 3. Process parameters in welding experiments

View table

Table 3. Process parameters in welding experiments

Sample No.	Plate thickness /mm	Incidence angle /(°)	Gap /mm	Laser power /kW	Welding speed /(m·min^-1)
1#	3(MT)+2(2G)	0	0	5.5	3.8
2#	1.5(HT)+0.8(DLT)	0	0	3.6	3.5
3-1#	2(2G)+2(2G)	0	0	3.8	3.6
3-2#	2(2G)+2(2G)	0	0.2	3.8	3.6
3-3#	2(2G)+2(2G)	20	0	3.8	3.6
4#	1.5(HT)+2(2G)	0	0	3.1	3.3
5#	1.5(ST)+2(2G)	0	0	3.1	3.3

Table 4. Tensile-shear test results of 1# and 2# joints

View table

Table 4. Tensile-shear test results of 1# and 2# joints

SampleNo.	Specimenwidth /mm	Averagetensile-shearstrength /MPa	σ_x /MPa		σ_y /MPa
SampleNo.	Specimenwidth /mm	Averagetensile-shearstrength /MPa	Upper plateweld seam	Lower plateweld seam	Upper plateweld seam	Lower plateweld seam
1#	10	736	0	0	0	0
	80	706	252	155	-21	-12
2#	10	596	0	0	0	0
	80	542	367	237	-39	-5

Table 5. Tensile-shear test results of 3-1#, 3-2#, and 3-3# specimens

View table

Table 5. Tensile-shear test results of 3-1#, 3-2#, and 3-3# specimens

SampleNo.	Specimenwidth /mm	Averagetensile-shearstrength /MPa	σ_x /MPa		σ_y /MPa
SampleNo.	Specimenwidth /mm	Averagetensile-shearstrength /MPa	Upper plateweld seam	Lower plateweld seam	Upper plateweld seam	Lower plateweld seam
3-1#	80	736	206	206	-36	-10
3-2#	80	671	196	155	14	-73
3-3#	80	764	147	147	-84	-42

Table 6. Tensile-shear test results of 4# and 5# specimens
View table
Table 6. Tensile-shear test results of 4# and 5# specimens
SampleNo. Specimenwidth /mm Averagetensile-shearstrength /MPa σ_x /MPa σ_y /MPa
Upper plateweld seam Lower plateweld seam Upper plateweld seam Lower plateweld seam
4# 80 804 303 168 -73 -54
5# 80 764 236 185 -32 -48

Tools

Get Citation

Copy Citation Text

Hang Liang, Ying Kan, Yunlu Jiang, Huaining Chen. Mechanical Properties of Laser Overlap Welded Joints of Stainless Steel Sheets[J]. Chinese Journal of Lasers, 2018, 45(6): 0602001

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites