Microscopic Analysis of Heat Affected Zone (HAZ) of Submerged Arc Welding (saw) Joint for 1018 Mild Steel Sheet

Tadavi, Tanvir; Jogi, Bhagwan F.; Dhende, Shahaji; Banait, S.; Wagh, Pranita

doi:10.2991/iccasp-16.2017.32

Cited by 2 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The HAZ refers to the area of base metal adjacent to the weld but not melted during the welding process. As depicted in Figure 2 a,b, according to the peak temperature and cooling time during welding, the HAZ can be divided into several sub-regions, including the coarse-grained heat-affected zone (CGHAZ), fine-grained heat-affected zone (FGHAZ), inter-critical heat-affected zone (ICHAZ), and subcritical heat-affected zone (SCHAZ) [ 30 , 31 ]. An interesting sub-region, the inter-critical reheated coarse-grained heat-affected zone (ICCGHAZ), is formed due to the tempering of the preformed CGHAZ by subsequent welding passes [ 32 , 33 ], which results in a structure that differs from the typical CGHAZ.…”

Section: Resultsmentioning

confidence: 99%

Inhomogeneous Strain Behaviors of the High Strength Pipeline Girth Weld under Longitudinal Loading

Zhang,

Ma,

Liu

et al. 2024

Materials

View full text Add to dashboard Cite

Unforeseen failures in girth welds present a significant challenge for the pipeline industry. This study utilizes 3D Digital Image Correlation (DIC) assisted cross-weld tensile testing to analyze the strain response of high-strength thick-walled pipelines, providing essential insights into the strain migration and fracture mechanisms specific to girth welds. The results reveal that the welding process significantly affects the mechanical distribution within the girth weld. The tested Shielded Metal Arc Welded (SMAW-ed) pipe exhibited undermatched girth welds due to high heat input, while Gas Metal Arc Welding (GMAW) introduced a narrower weld and Heat-Affected Zone (HAZ) with higher hardness than the base metal, indicative of overmatched girth welds. Strain migration, resulting from a combination of metallurgical heterogeneous materials and geometrical reinforcement strengthening, progressed from the softer HAZ to the base metal in the SMAW-ed sample with reinforcement, ultimately leading to fracture in the base metal. In contrast, the GMAW-ed sample shows no strain migration. Reinforcement significantly improves the tensile strength of girth welds and effectively prevents failure in the weld region. Sufficient reinforcement is crucial for minimizing the risk of failure in critical areas such as the weld metal and HAZ, particularly in SMAW-ed pipes.

show abstract

Section: Resultsmentioning

confidence: 99%

Inhomogeneous Strain Behaviors of the High Strength Pipeline Girth Weld under Longitudinal Loading

Zhang,

Ma,

Liu

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…In this process, heat generated between the workpiece and the consumable electrode is fed continuously from a wire electrode roll, which is quite enough to produce the welding arc. A type of granular flux is used to protect the welding region, reduce the cooling rate and heat energy losses, and prevent most welding defect types [2]. In recent decades, the development of the surface and mechanical properties for AISI 1020 low-carbon steel has been studied as they are commonly used in engineering applications, especially in welding applications [3].…”

Section: Introductionmentioning

confidence: 99%

Influence of Welding Parameters on Optimization of the Tensile Strength and Peak Temperature in AISI 1020 Alloy Joints Welded by SAW

Jassim

Lieth

Al-Sabur

et al. 2022

Preprint

View full text Add to dashboard Cite

Submerged Arc Welding (SAW) is a safe and efficient process for joining thick plates AISI 1020. A high-quality weld joint is a critical objective in a series of optimization studies. The current study focuses on maximizing the ultimate tensile strength and minimizing the peak temperature using Taguchi, Genetic Algorithm (GA), and Simulated Annealing (SA) algorithms. The input parameters in the three techniques were voltage (V), welding speed (S), and wire feed rate (F). At a 95% confidence level, the regression models were combined using the ANOVA to predict tensile strength and peak temperature. The maximum ultimate tensile strength was 599MPa achieved at a welding speed of 30 mm/s, an arc voltage of 30 V, and a wire feed rate of 120 mm/s, while the minimal peak temperature was 417C under the same conditions. With the increase of the welding parameters (welding speed, arc voltage, and feed rate), the ultimate tensile strength was increased. Furthermore, the average hardness achieved was 250 at welding metal and 292 at HAZ, while it was 275 at the base metal. The results were supported with an examination of microstructure. In the heat-affected zone (HAZ), the grain was finer while its grain size was larger in specimens with high tensile strength. It was noticed that the HAZ contains pearlite and some colonies of ferrite.

show abstract

Microscopic Analysis of Heat Affected Zone (HAZ) of Submerged Arc Welding (saw) Joint for 1018 Mild Steel Sheet

Cited by 2 publications

References 4 publications

Inhomogeneous Strain Behaviors of the High Strength Pipeline Girth Weld under Longitudinal Loading

Inhomogeneous Strain Behaviors of the High Strength Pipeline Girth Weld under Longitudinal Loading

Influence of Welding Parameters on Optimization of the Tensile Strength and Peak Temperature in AISI 1020 Alloy Joints Welded by SAW

Contact Info

Product

Resources

About