Microstructure and mechanical properties of K-TIG welded dissimilar joints between TC4 and TA17 titanium alloys

Ou, Peng; Cao, Zengqiang; Hai, Minna; Qiang, Jianfeng; Wang, Yongmei; Wang, Jianhong; Zheng, Gengfeng; Zhang, Junlei

doi:10.1016/j.matchar.2023.112644

Cited by 17 publications

(3 citation statements)

References 59 publications

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“…Unevenly sized equiaxial twins connected, and the austenite grains of the base metal at the melting boundary directly contacted the welded molten pool cell to generate epitaxial nucleation, as shown in Figure 3 a. In addition, the homogenization caused by solid diffusion was small due to the matrix of the fusion zone on the TP304H side still being austenite and the structure being tightly arranged [ 9 ]. Close to the fusing line side, the austenite grains grew epitaxially from the base metal to the weld recrystallization zone.…”

Section: Microstructure Of Welded Jointsmentioning

confidence: 99%

“…Zhang [ 8 ] characterized semicircular and linear layered textures in fusion zone and tensile fracture features based on the microstructure. Ou [ 9 ] paid more attention to the evolutionary process of the microstructural morphology of the welded joint and obtained the structure–property relationship of the joint. Zhai [ 10 ] further investigated the effect of the microstructural evolution on the creep properties.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural and Performance Analysis of TP304H/T22 Dissimilar Steel Welded Joints

et al. 2023

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In the power plant boiler industry, dissimilar steel welding is widely used in the connection of thermal power generation units. As an important component of the unit, research on the organizational properties of dissimilar steel welded joints has significant guidance for the life design of the joint. For the long-term service state of TP304H/T22 dissimilar steel welded joints, the microstructure’s morphological evolution, the microhardness, and the tensile properties of tube samples were analyzed using tests and numerical simulations. The results show that the microstructure of each part of the welded joint was free of damaged features, such as a creep cavity and intergranular cracks. The microhardness of the weld was higher than that of the base metal. In the tensile test, the welded joints broke at the weld metal at room temperature and at the side of the TP304H base metal at a temperature of 550 °C. The tensile fracture morphology demonstrated a change from a ductile fracture to a hybrid fracture when the temperature rose. The fusion zone and base metal on the TP304H side were the stress concentration areas of the welded joint, which easily sprouted cracks. This study holds significant reference value in assessing the safety and reliability of dissimilar steel welded joints in superheater units.

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Section: Microstructure Of Welded Jointsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructural and Performance Analysis of TP304H/T22 Dissimilar Steel Welded Joints

et al. 2023

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“…This because filler rods have low melting point for aluminium and when it is too close to the arc, there is possibility of its melting before the actual contact is made with the weld. More so, it is important that the arc current is reduced as it approaches completion to allow the weld crater sodify and reduce cracks at the end of the process [3].…”

Section: Tungsten Inert Gas (Tig) Weldingmentioning

confidence: 99%

Tungsten inert gas (TIG) and metal inert gas (MIG) welding applications - critical review

et al. 2023

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The review focused on the applications of tungsten inert gas a (TIG) metal inert gas (MIG) welding processes. Each of the welding process was critical studied to understand the operations and the need to maintain safety and reliable weld with adequate mechanical properties. In addition, the various applications in the aerospace, aeronautic, automotive and food packaging industries were critically highlighted. However, there potentials as well as problems highlighted have been critically reviewed and reported especially porosity which usually result into hole defects at the weld joint as well as plastic deformation due to the frictional heat induced have been reported in this study. Furthermore, the study further recommended friction stir processes integrated with TIG/MIG welding as an alternative method that will solve the problems associated with fatigue behaviour of welded joint. Thus, the study provided potential information to all stakeholders especially the professional welders on the need-to-know which method is applicable to aluminium alloy welding

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Mechanical properties and corrosion resistance of TC4 titanium alloy joints by plasma arc welding + gas tungsten arc welding combination welding

Zhang,

Wu,

et al. 2024

J Mater Sci

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Microstructure and mechanical properties of K-TIG welded dissimilar joints between TC4 and TA17 titanium alloys

Cited by 17 publications

References 59 publications

Microstructural and Performance Analysis of TP304H/T22 Dissimilar Steel Welded Joints

Microstructural and Performance Analysis of TP304H/T22 Dissimilar Steel Welded Joints

Tungsten inert gas (TIG) and metal inert gas (MIG) welding applications - critical review

Mechanical properties and corrosion resistance of TC4 titanium alloy joints by plasma arc welding + gas tungsten arc welding combination welding

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