Investigating the effects of welding process on residual stresses, microstructure and mechanical properties in HSLA steel welds

Alipooramirabad, Houman; Paradowska, Anna; Ghomashchi, Reza; Reid, Mark

doi:10.1016/j.jmapro.2017.04.030

Cited by 85 publications

(37 citation statements)

References 21 publications

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“…However, the impact toughness of the underwater dry welding specimens was much higher than that of the underwater local cavity welding specimens. Alipooramirabad et al [13] implied that one of the important steps in design and fabrication of welded structures is selection of the welding process and the filler consumables. Furthermore, it is concluded that this is because those two factors are controlling the mechanics of thermal distribution and the chemistry of the weld.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Selected Properties of Welded Joints of the HSLA Steels

et al. 2020

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This paper presents research of the impact toughness and hardness distribution in specific zones of a ‘single V’butt multiple-pass welded joints of the high-strength low-alloyed steels. Obtained values of the impact toughness are analyzed in correlation with a microstructure in specific zones of the welded joint, together with the micro hardness distribution found in the related zones. Based on the carried out analysis and results obtained in experiments, the applied technology of welding was evaluated. The original conclusions on influence of the selected welding procedure manual metal arc (MMA) for the root passes and metal active gas (MAG) for the filling and covering passes) on impact toughness of the high-strength low-alloyed steels are drawn. The paper also presents discussion on the valid standards and recommendations related to welding of those steels, from the aspect of applications in design of steel welded constructions.

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Section: Introductionmentioning

confidence: 99%

Analysis of Selected Properties of Welded Joints of the HSLA Steels

et al. 2020

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“…Multi-pass welding is used in high-pressure and thick-walled pipes in natural gas and oil pipelines and other industries [1,2]. The X80 pipeline steel is used extensively in pipeline construction as a base metal in multi-pass welded joints.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Changes and Impact Toughness of Fill Pass in X80 Steel Weld Metal

Bai

Ding

Tong

et al. 2019

Metals

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Multi-pass welding is used in high-pressure and thick-walled pipes in natural gas and oil pipelines. When a welding layer of a welded joint is subjected to different welding thermal cycles, its microstructure and properties change, thereby affecting the overall welding performance. In this study, the temperature and microstructural variations of the fill pass 2 (FP2) in the entire welding process were investigated by combining the thermal cycle with the cascade welding method. The original FP2 and FP2 after double thermal cycles had the worse deformation ability by tensile test. The toughness of FP2 improved after a single thermal cycle, decreased after double thermal cycles, and improved again after triple thermal cycles. The content of martensite–austenite (M–A) constituents and the average grain size of FP2 in the cascade samples were inversely proportional to FP2 toughness. Massive M–A constituents and their unique distribution at the inter-critical temperature were harmful to weld metal toughness. Controlling the size and fraction of M–A constituents can improve weld metal toughness.

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“…Consequently, the cooling rate gradient remains low giving the sufficient time for grain growth, therefore, the relatively large ferrite is observed, as shown on Figure 2(a). By increasing the welding current level up to 120 A, the peak temperature of HAZ is increased making the greater cooling rate gradient, therefore, the smaller (Figure 2c) and or even sharper grain ( Figure 2e) are noticed to be appeared indicating the presence of bainite phase which dominantly contributing the hard nature of steel [12,13] Figure 2 (b), (d), and (f) show the microstructural view of weld metal of sample welded with 80, 100, and 120 A describing the development of dark area along with the increase of welding current. This indicates that the carbon distribution played an important role to determine the weld metal property.…”

Section: Resultsmentioning

confidence: 99%

Hardness analysis on carburized steel weld joint by SMAW using different welding current

et al. 2018

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Low-cost weld joint on wear-resist gear train component was introduced for replacing conventional bolted connection to avoid its additional material and holes requirement. This study was concerned on the hardness analysis of carburized steel weld joint generated from SMAW with different welding currents, namely 80, 100, and 120 A. The results indicated that the hardness is decreased at HAZ and subsequently increased at weld metal for all samples. On the other hand, the highest welding current applied during welding shows the highest hardness curve among the other currents up to 226.5±2 HV at weld metal. By micro-and macrostructural analyses, phases evolution during thermal cycle on welding process played the crucial role to determine the hardness of HAZ, while the weld metal hardness was dominantly driven by the carbon-rich element distribution.

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Investigating the effects of welding process on residual stresses, microstructure and mechanical properties in HSLA steel welds

Cited by 85 publications

References 21 publications

Analysis of Selected Properties of Welded Joints of the HSLA Steels

Analysis of Selected Properties of Welded Joints of the HSLA Steels

Microstructural Changes and Impact Toughness of Fill Pass in X80 Steel Weld Metal

Hardness analysis on carburized steel weld joint by SMAW using different welding current

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