Effect of thermal history on the tensile strength of a friction stir welded aluminum alloy

Selvaraj, M.; Rao, K. Prahalada; Selvakumar, G.; Vela, M. E.

doi:10.3139/120.111269

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…As dislocation multiplies and recovery occurs due to dislocation rearrangement, the flow stress saturates and approaches a dynamic equilibrium. The flow stress remains constant as the strain grows, resulting in steady-state deformation [58][59][60]. The steady state is mirrored by equiaxed sub-grains with virtually dislocation-free interiors, constant sub-grain size, and sub-grain border misorientation, as shown in Figure 8.…”

Section: Microstructural Analysismentioning

confidence: 97%

“…Regardless of composition, the extreme turbulence of the material in a semi-solid state around the pin causes the particles in the SZ to fragment [33,64]. steady-state deformation [58][59][60]. The steady state is mirrored by equiaxed sub-grains with virtually dislocation-free interiors, constant sub-grain size, and sub-grain border misorientation, as shown in Figure 8.…”

Section: Microstructural Analysismentioning

confidence: 99%

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Development of Al-Mg2Si Alloy Hybrid Surface Composites by Friction Stir Processing: Mechanical, Wear, and Microstructure Evaluation

et al. 2023

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Surface composites are viable choices for various applications in the aerospace and automotive industries. Friction Stir Processing (FSP) is a promising method for fabricating surface composites. Aluminum Hybrid Surface Composites (AHSC) are fabricated using the FSP to strengthen a hybrid mixture prepared with equal parts of Boron carbide (B4C), Silicon Carbide (SiC), and Calcium Carbonate (CaCO3) particles. Different hybrid reinforcement weight percentages (reinforcement content of 5% (T1), 10% (T2), and 15% (T3)) were used in fabricating AHSC samples. Furthermore, different mechanical tests were performed on hybrid surface composite samples with different weight percentages of the reinforcements. Dry sliding wear assessments were performed in standard pin-on-disc apparatus as per ASTM G99 guidelines to estimate wear rates. The presence of reinforcement contents and dislocation behavior was investigated using Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) studies. The results indicated that the Ultimate Tensile Strength (UTS) of sample T3 exhibited 62.63% and 15.17% higher than that of samples T1 and T2, respectively, while the Elongation (%) of T3 exhibited 38.46% and 15.38% lower than that of samples T1 and T2, respectively. Moreover, it was found that the hardness of sample T3 increased in the stir zone compared to samples T1 and T2, owing to its higher brittle response. The higher brittle response of sample T3 compared to samples T1 and T2 was confirmed by the higher value of Young’s modulus and the lower value of Elongation (%).

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Section: Microstructural Analysismentioning

confidence: 97%

Section: Microstructural Analysismentioning

confidence: 99%

Development of Al-Mg2Si Alloy Hybrid Surface Composites by Friction Stir Processing: Mechanical, Wear, and Microstructure Evaluation

et al. 2023

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Regression model for obtaining peak temperature and heat generation during friction stir welding of stainless steel

Selvaraj

2022

Materials Today: Proceedings

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Steel shot peening effects on friction stir welded AA2014-T6 aluminum alloys

Mallieswaran¹,

Rajasekaran²,

Kumar

et al. 2022

Materials Testing

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The high-strength aluminum alloy is the potential candidate to replace conventional materials. It has excellent corrosion-resistant, recyclable machinability. The joining of such a type of alloy using fusion welding is very difficult. Solid-state welding, friction stir welding (FSW) has been used. However, this process has attained a maximum joint of 90% of base material strength. The drop of remaining strength is due to the formation of the temperate region in the thermo-mechanically affected area. Most of the researchers have been reported that the failure has observed at the interface. Many techniques have been followed to improve the strength at the temperate region, namely, post-weld heat treatment, backing plate change, sheet position, tool offset, etc. In this study, the shot blasting technique has been used to improve the lost strength in the soft region. From the experimental result, the joint shot-peened with steel shot yielded higher strength than the classical friction stir welded (C-FSW) joints. Moreover, the stability of the shot-peened joint has been conceived 6.9% more than the C-FSW joint.

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Effect of thermal history on the tensile strength of a friction stir welded aluminum alloy

Cited by 3 publications

References 21 publications

Development of Al-Mg2Si Alloy Hybrid Surface Composites by Friction Stir Processing: Mechanical, Wear, and Microstructure Evaluation

Development of Al-Mg2Si Alloy Hybrid Surface Composites by Friction Stir Processing: Mechanical, Wear, and Microstructure Evaluation

Regression model for obtaining peak temperature and heat generation during friction stir welding of stainless steel

Steel shot peening effects on friction stir welded AA2014-T6 aluminum alloys

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