Role of bead shape and dispersed intermetallic phases in determining the strength of CMT brazed DP780 lap joints

Singh, Jaivindra; Arora, Kanwer Singh; Shajan, Nikhil; Shukla, Dinesh Kumar; Shome, Mahadev

doi:10.1016/j.jmapro.2019.06.007

Cited by 27 publications

(4 citation statements)

References 22 publications

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“…This was due to the low energy necessary to melt the filler metal. The phase transformations in the HAZ are owing to the GMAW-P-brazing process, which reaches a maximum temperature of 850 • C. The ERCuAl-A2 electrode used in the current study produces a cooling rate in the range of 35-120 • C/s; by virtue of this, the transformation of phases found in the HAZ takes place [13,14,25].…”

Section: Microstructural Characterization Of Lap Weldmentsmentioning

confidence: 85%

“…The authors found that there is a maximum in the hardness profile at the edge of the DP-600 steel and the CuSi 3 welding material [12]. Singh et al evaluated the CMT welding process for lap joining of zinc-coated DP-780 steel with a CuAl 10 Fe filler wire and observed that the heat input increased the concentration of intermetallic compounds from 13.9% to 15.6% [13]. Varol et al analyzed the evaporation of zinc for a TRIP-800 steel with a CuAl8 filler metal; a low heat input was seen to decrease the evaporation of zinc from the joint of the galvanized steel [14].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Microstructural and Mechanical Behavior of AHSS CP780 Steel Welded by GMAW-Pulsed and GMAW-Pulsed-Brazing Processes

Romero-Orozco

Taha‐Tijerina

Luna-Alanís³

et al. 2022

Metals

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Joints of complex phase 780 (CP-780) advanced high strength steel (AHSS) were carried out by using an ER-CuAl-A2 filler metal for the gas metal arc welding pulsed brazing (GMAW-P- brazing) process and the ER-80S-D2 for the GMAW-P process employing two levels of heat input. The phases in the weld bead and HAZ were analyzed, and the evaporation of zinc by means of scanning electron microscopy (SEM) was also monitored. The mechanical properties of the welded joints were evaluated by tension, microhardness and vertical impact tests. It was found that there was greater surface Zn evaporation in the joints welded with the GMAW-P process as compared to the GMAW-P-brazing process. The best results in tensile strength were observed in the joints welded with GMAW-P-brazing process, which increased by ~68% with respect to those of the GMAW-P. This behavior can be attributed to the formation of an intermetallic complex compound Cu-Al-Fe in the fusion line.

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Section: Microstructural Characterization Of Lap Weldmentsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Evaluation of Microstructural and Mechanical Behavior of AHSS CP780 Steel Welded by GMAW-Pulsed and GMAW-Pulsed-Brazing Processes

Romero-Orozco

Taha‐Tijerina

Luna-Alanís³

et al. 2022

Metals

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“…Un ángulo cercano a la vertical produce una mayor fusión de la chapa superior, y por otro lado una velocidad menor genera una mayor deposición mejorando el mojado y extendiendo el ablandamiento del metal base por el mayor HI. Asimismo, la continuidad y espesor del intermetálico formado también contaría con un efecto sobre la integridad de la interfaz [36]. Para la condición óptima de operatividad y mojado, donde la fractura se produjo en la ZAC, se pudo establecer una eficiencia de junta del 83%.…”

Section: Ensayo De Arrancamientounclassified

Efecto de los Parámetros de Proceso sobre las Propiedades Mecánicas de Uniones GMAW-Brazing de Acero DP 1000

et al. 2020

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Resumen: Los aceros de fase dual (DP) ofrecen una buena combinación de resistencia, conformabilidad y soldabilidad y son de gran aplicación en la industria automotriz. La incorporación de estos nuevos materiales exige el desarrollo de nuevos procedimientos de soldadura. Actualmente, es cada vez más utilizado el proceso Gas Metal Arc Welding - Brazing (GMAW-B), debido a su buen aspecto superficial y a la ausencia de fusión de los materiales a unir, lo que limita la degradación microestructural en los aceros tipo DP. El objetivo de este trabajo es analizar el efecto de los parámetros de soldadura GMAW-B sobre las características de las juntas soldadas en aceros DP. Se soldaron probetas de chapa acero DP de 1000 MPa de resistencia a la tracción. Se analizó el efecto del ángulo de trabajo, del aporte térmico a través de la velocidad de soldadura y el modo operativo. Sobre las probetas soldadas se determinaron los aspectos geométricos del depósito, la generación de defectos y la evolución microestructural a lo largo de la junta soldada. Se realizaron ensayos de arrancamiento por tracción y perfiles de microdureza. Al disminuir la velocidad de soldadura y con un ángulo de trabajo de 30º aumentaron las longitudes de mojado del material de aporte sobre las chapas de acero DP y consecuentemente mejoró la resistencia de la junta soldada. Con el modo pulsado mejoró sustancialmente el aspecto superficial de los cordones, las características geométricas y el mojado, determinando así la ocurrencia de la fractura fuera del cordón, en la zona afectada por el calor (ZAC). Se determinó una longitud crítica de mojado mínima sobre ambas chapas que produce que la fractura se ubique en ZAC y se maximice la carga de rotura. Se desarrolló un modelo simple que permite predecir la carga de rotura a partir de las dimensiones del cordón y las propiedades del material en las distintas zonas

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“…Geleneksel MIG (Metal Inert Gas) kaynak yöntemi ile ince galvanizli çelik sacların birleştirilmesinde; kaynak elektrot telinin erime sıcaklığı, çinkonun 910°C buharlaşma sıcaklığından daha yüksek olduğundan, çinkonun kaynak bölgesinde ve çevresinde buharlaşmasına neden olmaktadır. Bu sebeple galvanizli çeliklerin ısı nedeniyle korozyon koruması da dahil olmak üzere bazı özellikleri kaybolur [10][11][12]. MIG lehimleme yöntemi ile ergime sıcaklığı çinkonun buharlaşma sıcaklığına yakın veya düşük olan kaynak elektrot telleri kullanılarak MIG kaynak yöntemine göre kaynak bölgesine düşük ısı girdisi verilir, ve böylece kaynağa bitişik minimum miktarda çinko korozyon koruması (galvanizleme) yanmış olur.…”

Section: Introductionunclassified

Influence of Different Shielding Gas Flow Rate in MIG-Brazed Joints of TRIP 800 Steel Plates

Ferik¹,

Varol²,

Aslanlar³

2022

acperpro

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Bu çalışmada, 1,5 mm kalınlığa sahip TRIP 800 çelik plakaları bakır esaslı S Cu 6100 (CuAl8) teliyle gaz metal ark lehimleme yöntemiyle birleştirilmiştir. Numuneler, bindirme birleştirme formunda hazırlanmıştır. Koruyucu gaz olarak argon kullanılmıştır ve lehimleme işlemleri 8, 10, 12, 14 ve 16 L/dk koruyucu gaz çıkış hızında yapılmıştır. Birleştirme noktalarının çekme dayanımı belirlenmiştir ve TRIP 800 çeliğinin gaz metal ark lehimleme tekniğiyle farklı koruyucu gaz çıkış hızlarında birleşebilirliğini görmek için birleştirme noktalarının mikro ve makroyapıları optik mikroskopta incelenmiştir.

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Role of bead shape and dispersed intermetallic phases in determining the strength of CMT brazed DP780 lap joints

Cited by 27 publications

References 22 publications

Evaluation of Microstructural and Mechanical Behavior of AHSS CP780 Steel Welded by GMAW-Pulsed and GMAW-Pulsed-Brazing Processes

Evaluation of Microstructural and Mechanical Behavior of AHSS CP780 Steel Welded by GMAW-Pulsed and GMAW-Pulsed-Brazing Processes

Efecto de los Parámetros de Proceso sobre las Propiedades Mecánicas de Uniones GMAW-Brazing de Acero DP 1000

Influence of Different Shielding Gas Flow Rate in MIG-Brazed Joints of TRIP 800 Steel Plates

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