Improvement in the Design of Welded Joints of EN 235JR Low Carbon Steel by Multiple Response Surface Methodology

Gas metal arc welding (GMAW) is a joining process that is controlled by several inputs or welding parameters. However, speed, current and voltage are the parameters that are most frequently used in setting this process. Cord area, yield stress, tensile strength, residual stresses, hardness and rough...

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Bibliographic Details
Published in:Metals (Basel ) 2016-09, Vol.6 (9), p.205-205
Main Authors: Lostado Lorza, Ruben, Escribano García, Ruben, Martínez Calvo, María, Múgica Vidal, Rodolfo
Format: Article
Language:English
Subjects:
Butt joints
Design optimization
Design parameters
Electric potential
Gas metal arc welding
Grooves
hardness
Low carbon steel
Low carbon steels
Manufacturing
Metals
modelling and optimizing welded joints
multiple response surface methodology
Parameters
Process parameters
Residual stress
residual stresses
Response surface methodology
roughness
Strength
Surface finish
Tensile strength
Voltage
Welded joints
Welding parameters
Yield stress
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Summary:Gas metal arc welding (GMAW) is a joining process that is controlled by several inputs or welding parameters. However, speed, current and voltage are the parameters that are most frequently used in setting this process. Cord area, yield stress, tensile strength, residual stresses, hardness and roughness are considered to be outputs or welded joints parameters. They are widely used when the design requirements are based on the cost, manufacturing speed, strength and surface finish. This paper seeks to determine the relationship between the welding parameters and the welded joint parameters of speed, current and voltage in butt joints (X-groove) of EN 235JR by the response surface method (RSM). The optimal joints when considering the design requirements of cost, manufacturing speed, strength and surface finish were achieved by using the multi-response surface (MRS). The optimal welding parameters reached when considering the design requirements of cost were 140.593 amps, 8.192 mm/s and 29.999 volts, respectively, whereas the design requirements of manufacturing speed were 149.88 amps, 9.261 mm/s and 29.999 volts. Finally, the welding parameters for the design requirements of joint strength and surface finish were 149.086 amps, 7.139 mm/s and 28.541 volts and 150.372 amps, 8.561 mm/s and 29.877 volts, respectively.
ISSN:2075-4701
2075-4701
DOI:10.3390/met6090205