The material flow and texture-weakening mechanism in double-sided friction stir welded Mg alloy

Zhou, Mengran; Sun, Yingjuan; Morisada, Yoshiaki; Shi, Qingyu; Fujii, Hidetoshi

doi:10.1080/13621718.2022.2139451

Cited by 8 publications

(2 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cross sections of all joints show a dumbbell shape with a wide top and bottom and narrow middle section, and can be divided into four typical zones related to the thermal cycle and plastic deformation experienced: stir zone (SZ), thermo-mechanically affected zone (TMAZ), heat-affected zone (HAZ), and BM, as shown in Figure 2(c). Intense plastic deformation occurs in the SZ, which produces dynamic recrystallization (see Figure 3) [20][21][22][23]. The expanded shoulder of the pin causes the surface of the plates to deform further.…”

Section: Microstructurementioning

confidence: 99%

A comparative study of microstructure and mechanical properties of conventional and synergistic double-sided FSW joints of 6061 zxaluminium alloy

Zou

Tang

et al. 2023

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

In this study, synergistic double-sided friction stir welding (DS-FSW) is proposed to solve the problems of large deformation and the time-consuming of traditional DS-FSW. The microstructure, mechanical properties, and fracture paths of novel and conventional joints are studied under different welding parameters. Results show that defects in novel joints have been improved. However, the grain size in the stir zone of novel joints is larger than that of conventional joints. The microhardness map of the novel joint shows a more uniform distribution compared to that of the conventional joint. At a rotational speed of 1800 rpm and transverse speed of 1000 mm min −1 , the distortion of the novel joint and conventional joint is 0.1 and 1 mm, respectively. The tensile force of novel joints is higher than that of conventional joints for the same welding parameters. The maximum tensile force of novel and conventional joints is 36.8 and 34.9 kN, respectively.

show abstract

Section: Microstructurementioning

confidence: 99%

A comparative study of microstructure and mechanical properties of conventional and synergistic double-sided FSW joints of 6061 zxaluminium alloy

Zou

Tang

et al. 2023

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

show abstract

“…With the improvement in the welding energy input, the use of TiN and Ti oxides to improve the toughness of the welding HAZ is no longer suitable for actual production [11]. Therefore, by adding Ca elements, a sufficient number of micron-scale inclusions were introduced into the steels [12,13]. Elements such as Ca or micron-scale compound inclusions formed with other elements play a very beneficial role in inducing the nucleation and growth of the IAF microstructure in the welding HAZ.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ca Addition on Inclusions of Welding Heat-Affected Zone in Pressure Vessel Steels

Liu,

Li,

Wang

et al. 2023

Coatings

View full text Add to dashboard Cite

Pressure vessel steels are used in the manufacture of tanks for the storage of gases, chemical materials and oil. To meet the increasing production demands, high-wire-energy welding is widely used in the manufacture of pressure vessel steels. This means that the weldability of pressure vessel steels needs to be improved. Therefore, in order to reveal the microalloying effect of Ca in pressure vessel steel, this study took a commonly used pressure vessel steel as the research object, and three groups of experimental steels with different Ca mass fractions were prepared using vacuum metallurgy, controlled rolling and controlled cooling. Welding heat simulation technology was used to simulate the welding heat of experimental steel and the welding heat-affected zone (HAZ) was investigated. The inclusions of the welding HAZ in the experimental steels were observed by using a metallographic microscope and scanning electron microscope (SEM). The mechanism of intragranular acicular ferrite (IAF) nucleation induced by the inclusions containing Ca elements in the welding HAZ of pressure vessel steels was also discussed. The research results show that the addition of Ca increased the number density of effective inclusions in the welding HAZ of the experimental steel up to 535.60 pieces/mm2. The addition of the Ca element was beneficial for producing more pinning inclusions in the experimental steel welding HAZ under the experimental conditions, and the inclusions were mainly elliptical oxide complex inclusions of Ca-Si with a size of about 2 μm. Meanwhile, Al2O3 and MnS were precipitated. After the addition of Ca elements, Mn-poor regions appeared around the inclusions containing Ca in the welding HAZ. IAF nucleation was mainly induced by the local compositional change mechanism and supplemented by the stress–strain energy mechanism and inert interface energy mechanism. This study provides a valuable reference for optimizing the welding process of pressure vessel steels and is of great importance for understanding the IAF nucleation mechanism of Ca-containing inclusions in the welding HAZ of pressure vessel steels.

show abstract

Strategy for double-side friction stir welding of thick Mg4Y3Gd alloy joints

Lone,

Ali,

Abidi

et al. 2024

Int J Adv Manuf Technol

View full text Add to dashboard Cite

The material flow and texture-weakening mechanism in double-sided friction stir welded Mg alloy

Cited by 8 publications

References 30 publications

A comparative study of microstructure and mechanical properties of conventional and synergistic double-sided FSW joints of 6061 zxaluminium alloy

A comparative study of microstructure and mechanical properties of conventional and synergistic double-sided FSW joints of 6061 zxaluminium alloy

Effect of Ca Addition on Inclusions of Welding Heat-Affected Zone in Pressure Vessel Steels

Strategy for double-side friction stir welding of thick Mg4Y3Gd alloy joints

Contact Info

Product

Resources

About