Microstructure and properties of friction stir welded aluminium alloys

Kalemba, I.; Dymek, S.

doi:10.1080/09507116.2014.937611

Cited by 9 publications

(3 citation statements)

References 9 publications

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“…Therefore, it is thought that the visibility of onion ring is remarkable in lower TRS and higher WS. According to some researchers, 13,19–23 the visibility of onion rings in the NZ depends on grain size and frictional heat, and also, the onion ring formation tendency 21 is decreased with increase in temperature (higher TRS and lower WS).…”

Section: Resultsmentioning

confidence: 99%

Investigations for the effect of parameters on the weld performance of AA 5083-H111 joined by friction stir welding

Kasman

Kahraman

2013

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this article, friction stir welding experiments were performed on AA 5083-H111 aluminum alloy using a tool with a triangular pin to study the effect of tool rotational speed and welding speed on the ultimate tensile strength, percentage of elongation (ε), hardness and microstructure. The investigations were done with the optical microscopy, stereomicroscopy, scanning electron microscope and energy dispersive spectroscopy. In the visual inspection, it was observed that some of nugget zones have an onion ring like features and a basin-shaped profile. The ultimate tensile strength and percentage of elongation (ε) of the welds decrease with decreasing the welding speed for the 800 r/min. On the other hand, as the welding speed increases, the UTS and ε decrease for the 1250 rpm/min, the ultimate tensile strength and percentage of elongation (ε) decrease. The main factor, which affects the reduction in both ultimate tensile strength and percentage of elongation (ε), is defects in the welds. A comparison of ultimate tensile strength and percentage of elongation (ε) as a function of tool rotational speed for the 100 mm/min showed that both ultimate tensile strength and percentage of elongation (ε) decrease with the increase in the tool rotational speed. The weld efficiency varied between 88.3% and 92% in the defect-free welds. The hardness distribution of the zones on the welds revealed that no remarkable differences exist between them. Hence, the variance on the grain sizes of zones is small.

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Section: Resultsmentioning

confidence: 99%

Investigations for the effect of parameters on the weld performance of AA 5083-H111 joined by friction stir welding

Kasman

Kahraman

2013

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…This has been corroborated by experimental evidence and precise numerical modeling measurements. Izabela et al [16] studied the hardness measurements, tensile tests, and microstructure analysis results of friction stir (FS) welded sheets of AA5083 and AA7075 alloys.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of the Mechanical Characteristics of Aluminum Alloys (AlSi8Cu3)

Fnides,

Bensana,

Fnides

et al. 2023

ACSM

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Aluminum alloys are widely recognized as highly advantageous materials for various engineering applications, including pistons, valve components, brakes, engine blocks, and impellers. In this study, our objective was to investigate the mechanical characteristics and surface behavior of the Aluminum alloy (AlSi8Cu3). To achieve this, torsion tests were conducted to analyze the material's response to shear and high deformation, while mitigating instability phenomena. Specifically, torsion tests were performed on annealed aluminum alloy specimens until rupture, at 1/3 of the rupture, and at 2/3 of the rupture to evaluate crucial material properties, such as the modulus of Young and shear modulus. Through these tests, we also examined the hardness of the specimens and analyzed the microstructural state at both the center and periphery of the deformed sections. Additionally, we determined the hardness, microstructure, and values of the strength coefficient (K) and the strain hardening exponent (n) within the plastic domain of the alloy. Our experimental results demonstrated that increasing deformation on the specimens led to a reduction in grain size. Furthermore, this deformation resulted in a decrease in Young's modulus, attributed to the initiation of cavity coalescence. Based on our investigation, we conclude that the obtained results are excellent and hold significant implications for further research in this field.

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“…Wang et al (2008) consider that the greatest advantage of FSW process lies in the possibility to weld so-called "non-weldable" aluminium alloys grades by conventional methods (arc welding, laser welding). As an example, Kalemba and Dymek (2016) have developed a thorough analysis on microstructure evolution in AA7136 aluminium alloy (Al-Zn-Mg-Cu) during FSW process. The authors justified their interest by the restricted range of industrial applications for theses alloys due to the difficulties encountered in their welding by conventional methods.…”

Section: Introductionmentioning

confidence: 99%

A review of microstructural changes occurring during FSW in aluminium alloys and their modelling

Jacquin

Guillemot

2021

Journal of Materials Processing Technology

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Friction stir welding (FSW) process is currently considered as a promising alternative to join aluminium alloys. Indeed, this solid-state welding technique is particularly recommended for the assembly of these materials. Since parts are not heated above their melting temperature, FSW process may prevent solidification defects encountered in joining aluminium alloys and known as limitations to the dissemination of these materials in industries. During the past years, large literature has been devoted to the modelling of microstructural evolution in aluminium alloys during FSW processes and mainly dedicated to the analysis of precipitate evolutions and grain recrystallization mechanisms. Precipitate size distribution models have aroused widespread interest in recent years demonstrating their relevance to follow precipitation process in multicomponent alloys and multiphase systems. Efficient recrystallization models are also available and based on various grain growth mechanisms. In addition, multi-scale coupling strategies have recently emerged considering thermal, mechanical and metallurgical solutions. Consequently, the effect of FSW process parameters on weld properties is now investigated to determine optimized welding strategies regarding microstructure evolution. This research is based on reliable models reported in the literature enhancing the estimation of final weld state and associated properties as an answer to industrial needs. Validations of proposed modelling strategies have been reported based on in-depth analyses of experimental observations. This present work proposes a review of recent models dedicated to microstructural evolutions in aluminium alloys during FSW process. The interest and efficiency of current approaches will be discussed to highlight their limitations. Guidelines will propose new routes toward enhanced modelling strategies for future developments.

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Microstructure and properties of friction stir welded aluminium alloys

Cited by 9 publications

References 9 publications

Investigations for the effect of parameters on the weld performance of AA 5083-H111 joined by friction stir welding

Investigations for the effect of parameters on the weld performance of AA 5083-H111 joined by friction stir welding

Experimental Analysis of the Mechanical Characteristics of Aluminum Alloys (AlSi8Cu3)

A review of microstructural changes occurring during FSW in aluminium alloys and their modelling

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