Heat generation, plastic deformation and residual stresses in friction stir welding of aluminium alloy

Salih, Omar S.; Ou, Hengan; Sun, Wei

doi:10.1016/j.ijmecsci.2022.107827

Cited by 42 publications

(11 citation statements)

References 82 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The alterations in microstructure within different zones have a substantial impact on the mechanical properties seen after welding. Consequently, numerous researchers have conducted investigations on the microstructural evolution that occurs during FSW [35,37,145,146]. Three unique zones, namely the stirred (nugget) zone, thermomechanically affected zone (TMAZ), and heataffected zone (HAZ) [147,148], have been discovered based on the microstructural characterization of grains and precipitates, as depicted in Figure 9 [147], Figure 10a [149] and Figure 10b [150].…”

Section: Microstructural Changes Occurring During Fswmentioning

confidence: 99%

A Review of Recent Developments in Friction Stir Welding for Various Industrial Applications

Bharti,

Kumar,

Singh

et al. 2023

JMSE

View full text Add to dashboard Cite

Friction stir welding (FSW) has been recognized as a revolutionary welding process for marine applications, effectively tackling the distinctive problems posed by maritime settings. This review paper offers a comprehensive examination of the current advancements in FSW design, specifically within the marine industry. This paper provides an overview of the essential principles of FSW and its design, emphasizing its comparative advantages when compared with conventional welding techniques. The literature review reveals successful implementations in the field of shipbuilding and offshore constructions, highlighting design factors as notable enhancements in joint strength, resistance to corrosion, and fatigue performance. This study examines the progress made in the field of FSW equipment and procedures, with a specific focus on their application in naval construction. Additionally, it investigates the factors to be considered when selecting materials and ensuring their compatibility in this context. The analysis of microstructural and mechanical features of FSW joints is conducted, with a particular focus on examining the impact of welding settings. The study additionally explores techniques for mitigating corrosion and safeguarding surfaces in marine environments. The study also provides a forward-looking perspective by proposing potential areas of future research and highlighting the issues that may arise in the field of FSW for maritime engineering. The significance of incorporating environmental and economic considerations in the implementation of FSW for extensive marine projects is emphasized.

show abstract

Section: Microstructural Changes Occurring During Fswmentioning

confidence: 99%

A Review of Recent Developments in Friction Stir Welding for Various Industrial Applications

Bharti,

Kumar,

Singh

et al. 2023

JMSE

View full text Add to dashboard Cite

show abstract

“…The SZ represents the central region where the FSW tool interacts with the workpieces, undergoing significant plastic flow and grain refinement to form a metallurgical bond [7]. The AS and RS refer to the sides of the joint where the FSW tool moves forward and backward, respectively, during welding, with the AS experiencing greater plastic deformation and thermal effects [8,9]. These zones are crucial focal points in the study of FSW due to their varying thermalmechanical effects.…”

Section: Introductionmentioning

confidence: 99%

Quasi-In Situ Observation of the Microstructural Response during Fatigue Crack Growth of Friction Stir Welded AA2024-T4 Joint

Yang,

Chen,

Zhao

et al. 2024

Materials

View full text Add to dashboard Cite

The reliability of friction stir welded joints is a critical concern, particularly given their potential applications in the aerospace manufacturing industry. This study offers a quasi-in situ observation of the microstructural response during fatigue crack growth (FCG) of a friction stir welded AA2024-T4 joint, aiming to correlate fatigue crack growth behavior with mechanical properties investigated using electron backscatter diffraction (EBSD). Notched compact tension (CT) specimens corresponding to the morphology of the stir zone (SZ), advancing side (AS), and retreating side (RS) were meticulously designed. The findings indicate that the welding process enhances the joint’s resistance to fatigue crack growth, with the base metal exhibiting a shorter fatigue life (i.e., ~105 cycles) compared to the welding zones (SZ ~ 3.5 × 105 cycles, AS ~ 2.5 × 105 cycles, and RS ~ 3.0 × 105 cycles). Crack propagation occurs within the stir zone, traversing refined grains, which primarily contribute to the highest fatigue life and lowest FCG rate. Additionally, cracks initiate in AS and RS, subsequently expanding into the base metal. Moreover, the study reveals a significant release of residual strain at the joint, particularly notable in the Structural-CT-RS (Str-CT-RS) sample compared to the Str-CT-AS sample during the FCG process. Consequently, the FCG rate of Str-CT-AS is higher than that of Str-CT-RS. These findings have significant implications for improving the reliability and performance of aerospace components.

show abstract

“…There has been remarkable progress in the development of numerical models for welding. Salih et al [4] proposed a FEM based on the coupled Euler-Lagrange method. The study provided valuable insights for the assessment of weld joint quality.…”

Section: Introductionmentioning

confidence: 99%

Study on Residual Stresses of 2219 Aluminum Alloy with TIG Welding and Its Reduction by Shot Peening

Zhang,

Chen,

Gong

et al. 2023

Metals

View full text Add to dashboard Cite

Large residual stress of 2219 aluminum alloy induced by Tungsten Inert Gas (TIG) welding decreases its service performances. Shot peening was adopted to decrease the residual stress of TIG welding. Numerical models of TIG welding and shot peening were established using the combined discrete and finite element methods (DEM–FEM). The results show that TIG welding induces tensile residual stress due to the heat exchange effect and the longitudinal stress is larger than that in the transverse direction. The maximum tensile stress occurs at a depth of 0.1 mm. The surface tensile stress changes to compressive stress after shot peening as the severe deformation induced by the shots changes the stress state of the plate. The maximum value of compressive stress (σm) and the peened depth with compressive stress (Z0) are adopted to describe the peening effect. The absolute value of σm increases with the increased peening speed and nozzle height. Mixed shots with a diameter of 0.8 mm and 1.2 mm induce larger value of σm than those with only a diameter of 1.2 mm. The value of Z0 increases with the ascending shots diameter and nozzle height, while it varies nonmonotonically with the peening speed. The effect of shot peening on the residual stress in TIG welding is discussed.

show abstract

Heat generation, plastic deformation and residual stresses in friction stir welding of aluminium alloy

Cited by 42 publications

References 82 publications

A Review of Recent Developments in Friction Stir Welding for Various Industrial Applications

A Review of Recent Developments in Friction Stir Welding for Various Industrial Applications

Quasi-In Situ Observation of the Microstructural Response during Fatigue Crack Growth of Friction Stir Welded AA2024-T4 Joint

Study on Residual Stresses of 2219 Aluminum Alloy with TIG Welding and Its Reduction by Shot Peening

Contact Info

Product

Resources

About