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Article . 2024 . Peer-reviewed
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Article . 2024
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Experimental Evaluation to Characterize Welded A36 Steel Joints Using the FCAW Process

Authors: C Ramos Hernández; C Serrano Aguiar; A Noguera Cundar;

Experimental Evaluation to Characterize Welded A36 Steel Joints Using the FCAW Process

Abstract

The objective of this investigation was the evaluation of mechanical properties and metallographic characterization of welded joints of ASTM A-36 steel through the FCAW process with cored wire E71T11 of 1.2 mm in diameter; applying the AWS D1.1 2020 welding code. Variations were made in voltage, current intensity, and feed speed. The welding process was carried out using Lincoln Arc R3S equipment. The joints were welded in 3 thickness groups, and each group had four variations in the weld seam. In addition, the welding processes have a WPS backup. Once the weld beads were made, ultrasound tests and visual inspection were applied to rule out discontinuities, surface imperfections, and incomplete fusion. In the corresponding test tubes for micrographs, it was possible to identify the filler material, base material, and the zone affected by heat, the same in which the microstructure was identified and then compared with the base material. A hardness profile was determined in the base material, ZAC, and the filler material. It is concluded that after applying the non-destructive and destructive tests, better conditions were achieved with the parameters established in the WPS of the following coupons FCAW-230-6, FCAW-225-8, FCAW-300-8, and FCAW-225- 10, evidencing that its mechanical and metallographic properties did not change significantly. It is recommended that the specimens obtained from the weld coupons have a cooled cut to avoid variations in the mechanical and metallographic properties. Keywords: FCAW process, ASTM A-36 steel, ASW D1.1 Standard, ZAC, mechanical properties, metallographic analysis. Resumen Esta investigación tuvo como objetivo la evaluación de propiedades mecánicas y caracterización metalográfica de juntas soldadas de acero de ASTM A-36 mediante el proceso FCAW con alambre tubular E71T11 de 1.2 mm de diámetro; aplicando el código de soldadura AWS D1.1 2020. Se realizó variaciones en el voltaje, intensidad de corriente y velocidad de alimentación. El proceso de soldadura se lo realizó con un equipo Lincoln Arc R3S. Las juntas fueron soldadas en 3 grupos de espesores, cada grupo cuenta con 4 variaciones en el cordón de soldadura. Además, los procesos de soldadura cuentan con un WPS de respaldo. Una vez realizados los cordones de soldadura se aplicaron ensayos de ultrasonido e inspección visual para descartar discontinuidades, imperfecciones superficiales y fusión incompleta. En las probetas correspondientes para micrografías se logró identificar el material de aporte, material base y la zona afectada por el calor, misma en la que se identificó la microestructura y luego fue comparada con el material base. Se determinó un perfil de dureza en el material base, ZAC y el material de aporte. Se concluye que luego de aplicar los ensayos no destructivos y destructivos, se consiguieron mejores condiciones con los parámetros establecidos en los WPS de los siguientes cupones FCAW-230- 6, FCAW-225-8, FCAW-300-8 y FCAW-225-10, evidenciando que sus propiedades mecánicas y metalográficas no cambian de manera significativa. Se recomienda, que las probetas obtenidas de los cupones de soldadura tengan un corte refrigerado para para evitar variaciones en las propiedades mecánicas y metalográficas. Palabras Clave: Proceso FCAW (Flux Core Arc Welding), Acero ASTM A-36, Norma AWS D1.1, ZAC, Propiedades mecánicas, Análsis metalografico.

Keywords

Q1-390, Science (General), fcaw process, astm a-36 steel, asw d1.1 standard, zac, mechanical properties, metallographic analysis.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold