Effect of Laser Welding Parameters on Forming Behavior of Tailor Welded Blanks

A tailor welded blank (TWB) includes two or more blanks joined together in order to make a single blank. Different welding methods are used to join blanks with different characteristics and form TWBs. In this study, a comparison is made among the effects of three different welding methods namely CO2 laser welding, friction stir welding (FSW), and friction stir vibration welding (FSVW) on mechanical and formability properties of developed TWBs. AA6061 alloy sheets with different thicknesses (1.2 and 0.8 mm) are joined to get TWBs. The forming limit diagram (FLD) and limiting dome height (LDH) are applied to assess the formability. The Taguchi method is applied to find the optimum values of welding parameters. It is concluded that TWBs made by FSVW have higher mechanical properties and formability compared to TWBs made by FSW and CO2 laser welding. The results also indicate that FLD for TWBs made by FSW is higher than FLD for TWBs made by CO2 laser welding and FLD0, for TWBs made by FSVW, increases as vibration frequency increases.

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Effect of Laser Welding Parameters on Forming Behavior of Tailor Welded Blanks

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.445.406 ◽

2012 ◽

Vol 445 ◽

pp. 406-411 ◽

Cited By ~ 2

Author(s):

R. Safdarian Korouyeh ◽

Hassan Moslemi Naeini ◽

M.J. Torkamany ◽

J. Sabaghzadee

Keyword(s):

Laser Welding ◽

Nd:Yag Laser ◽

Dissimilar Materials ◽

Uniaxial Tensile ◽

Welding Parameters ◽

Uniaxial Tensile Test ◽

Tailor Welded Blanks ◽

Weld Properties ◽

Single Sheet

Tailor Welded Blanks (TWB) are blanks in which two or more sheets of similar or dissimilar materials, thicknesses, coatings etc. are welded together to form a single sheet before forming. Forming behavior of TWBs is affected by thickness ratio, strength ratio, weld conditions such as weld properties, weld orientation, weld location etc. In this work, Nd:YAG laser welding will be use to weld TWB with different thickness in experimental test. Nd:YAG laser welding parameters such as pulse duration, welding velocity, frequency and peak power will affect formability of TWBs. Taguchis design of experiments methodology is followed to design of experiment and obtain the percentage contribution of factors considered. Erichsen formability test and uniaxial tensile test (ASTM-E8) will be use in experiment setup to compare result of different welding parameters on formability quality of TWBs.

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Effect of Intermetallic Compounds Content on Laser Welding Performance of Al-Fe Alloy Sheets

Materials Science Forum ◽

10.4028/www.scientific.net/msf.794-796.401 ◽

2014 ◽

Vol 794-796 ◽

pp. 401-406 ◽

Cited By ~ 1

Author(s):

Pi Zhi Zhao ◽

Yan Feng Pan ◽

Jiang Tao ◽

Xiang Jun Shi ◽

Qi Zhang

Keyword(s):

Thermal Conductivity ◽

Laser Welding ◽

Intermetallic Compounds ◽

Nonuniform Distribution ◽

Welding Parameters ◽

Lower Content ◽

Absorbed Energy ◽

Size Uniformity ◽

Distribution Uniformity ◽

Weld Pools

The present study investigated the laser welding performance of Al-Fe aluminum alloy sheets with different contents of intermetallic compounds. Under the same welding parameters, the alloy of higher intermetallic compounds content has wide and deep weld pools with uniform sizes. The alloy of lower intermetallic compounds content has narrow and shallow weld pools with nonuniform sizes. The higher content of intermetallic compounds results in higher laser absorptivity and lower thermal conductivity, and then increases the effective absorbed energy during welding, which is beneficial to the formation of wide and deep weld pools. The distribution uniformity of intermetallic compounds influences the size uniformity of weld pools. In the alloy with lower content of intermetallic compounds, the nonuniform distribution of intermeallic compounds results in the formation of abnormal weld pool, leading to the nonuniform size of the weld pools. In the alloy with higher content of intermetallic compounds, uniform distribution of intermetallic compounds make the size of weld pools more uniform.

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Effect of steel to aluminum laser welding parameters on mechanical properties of weld beads

Optics & Laser Technology ◽

10.1016/j.optlastec.2018.09.060 ◽

2019 ◽

Vol 111 ◽

pp. 387-394 ◽

Cited By ~ 15

Author(s):

Qianqian Guan ◽

Jiangqi Long ◽

Ping Yu ◽

Shunchao Jiang ◽

Wenhao Huang ◽

...

Keyword(s):

Mechanical Properties ◽

Laser Welding ◽

Welding Parameters

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Effects of welding parameters on weld geometry during high-power laser welding of thick plate

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-015-6813-z ◽

2015 ◽

Vol 79 (1-4) ◽

pp. 177-182 ◽

Cited By ~ 25

Author(s):

Shichun Li ◽

Genyu Chen ◽

Cong Zhou

Keyword(s):

Laser Welding ◽

High Power ◽

Thick Plate ◽

Welding Parameters ◽

High Power Laser ◽

Power Laser ◽

Weld Geometry

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Characteristics of the Keyhole and Energy Absorption during YAG Laser Welding of Al-Li Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.2401 ◽

2011 ◽

Vol 287-290 ◽

pp. 2401-2406 ◽

Cited By ~ 1

Author(s):

Ai Qin Duan ◽

Shui Li Gong

Keyword(s):

Laser Welding ◽

Heat Input ◽

High Speed ◽

Laser Energy ◽

Welding Parameters ◽

High Speed Camera ◽

Welding Time ◽

Welding Condition ◽

Yag Laser ◽

Temperature Area

In this paper, the keyhole of YAG laser welding 5A90 Al-Li alloy was observed and measured through the high speed camera. The characteristics of the keyhole and the effects of welding parameters were studied. The characteristics of the absorption of laser energy and the susceptivity for heat input in welding 5A90 were given. The results show that in this welding condition, the keyhole of laser welding 5A90 is nearly a taper and the highest temperature area is in the bottom. There are clear effects of heat input on the characteristics, especially the surface radius of keyhole and plasma/vapor in keyhole. Another phenomena is observed that sometime plasma/vapor could disappear in 0.3ms welding time, and this feature will be more remarkable as decrease of heat input. It shows that the absorption of energy is unsteady. It is known that when this instability reaches a certain value, an unsteady weld will be formed.

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