Effect of Welding Parameters on Weld Formation and Mechanical Properties in Dissimilar Al Alloy Joints by FSW

Song, Sung Heon; Kim, Byung-Chul; Yoon, Tae‐Jin; Kim, Nam-Kyu; Kim, In-Bae; Kang, Chung Gil

doi:10.2320/matertrans.m2010032

Cited by 38 publications

(17 citation statements)

References 22 publications

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“…Furthermore, certain defects in the fusion welding process, such as pores or cracks, are attributed to the limitation of the weld ability of the aluminum alloy [4]. However, Friction Stir Welding (FSW) can achieve solid-state welding without filler materials, which effectively avoids cracks and porosity defects [5][6][7][8][9][10]. Scialpi et al successfully conducted ultra-micro-friction stir welding on 0.8 mm 2024-T3 and 6082-T6 sheets, and analyzed the mechanical properties [11].…”

Section: Introductionmentioning

confidence: 99%

Influences of Pin Shape on a High Rotation Speed Friction Stir Welding Joint of a 6061-T6 Aluminum Alloy Sheet

Zhou

Chen

Wang

et al. 2018

Metals

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In order to explore the influences of different pins on the weld based on the specialty of the aluminium alloy sheet welding, three kinds of pins were chosen to perform high rotation speed friction stir welding on a 1 mm thick 6061-T6 aluminium alloy in this study. The microstructure and mechanical properties of the joints were analysed at the same time. When the rotation speed was 11,000 rpm and the welding speed was 300 mm/min, more sufficient stirring and a better joint (the tensile strength reaches 87.2% of the base metal) can be obtained with the pin design of a quadrangular frustum pyramid. The pattern of the weld cross section was a “flat T” and no obvious “S curve” was found in nugget zone (NZ). Heat affected zone (HAZ) and thermo-mechanically affected zone (TMAZ) were also narrow. The results demonstrate that the proportion of low angle boundaries in each area of the weld is lower than that of traditional Friction Stir Welding (FSW). The grain size of NZ is significantly refined and the proportion of low angle boundaries is only 20.1%, which have improved the welding quality.

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Section: Introductionmentioning

confidence: 99%

Influences of Pin Shape on a High Rotation Speed Friction Stir Welding Joint of a 6061-T6 Aluminum Alloy Sheet

Zhou

Chen

Wang

et al. 2018

Metals

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“…Many researchers have investigated microstructures of FSW. 48,49 Somasekharan & Murr 50 showed that after the friction welding of the Al6061 alloy to the magnesium alloys by moving from the Al6061 alloy metal base to the joint zone, the size of the alloy grains significantly is decreased. Moreira and his colleagues by investigating the microstructural behavior of the Al6061 and Al6082 alloys' joint concluded that due to the high strain after plastic deformation, resulting from the friction welding of these alloys, the joint zone was more susceptible for recrystallization than other areas.…”

Section: Microstructural Studiesmentioning

confidence: 99%

A review on friction stir welding, parameters, microstructure, mechanical properties, post weld heat treatment and defects

Heddad

Bayazid

Çayiroğlu

2018

MSEIJ

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Friction stir welding (FSW) as a solid state joining process is being known recently by many industries due to its capability to reduce defects, energy efficient, and environment friendly compared with conventional techniques. Specifically, FSW can be used to join highstrength aluminum alloys like 7XXX and 2XXX which are hard to weld by conventional fusion welding. In this review paper, the elementary principles of FSW, parameters, and the effect of the FSW parameters on microstructure and mechanical properties are addressed. Although this process has a lot of advantages compared with fusion techniques, however, many problems still remain unsolved related to poor mechanical properties of weldment's heat affected zone (HAZ). In this regard, the impact of post weld heat treatment (PWHT) on improvement of joint properties is addressed. Finally, appropriate parameters and factors for achieving the best condition of the weld is discussed.

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“…The recent studies on the FSW of aluminum alloy were mostly on the metal ow of the heterogeneous material 9) and its microstructure change, 10) and for the materials, on the butt joint and lap joint for plates with AA 5xxx 11,12) and 6xxx. 13) There are a few studies on the FSW joint for the 3D curvature shape.…”

Section: Introductionmentioning

confidence: 99%

A Feasibility Study on the Three-Dimensional Friction Stir Welding of Aluminum 5083-O Thin Plate

Kim

et al. 2016

Mater. Trans.

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Aluminum ships are increasingly being built these days according to the international marine environment contamination regulations. However, aluminum alloys are associated with many problems such as welding deformation. A basic study was conducted to address the problems using friction stir welding (FSW), a solid-state joining method. The AA 5083-O specimen was 2 mm-thick, and a device that provided ve-axis processing control was used for the curvature welding to determine the feasibility of the process. X-ray was used to test the FSW joints quality and to examine inner defects. The characteristics of the FSW joints were evaluated based on the deformation after the welding, tensile strength, and Vickers hardness of each test specimen, according to the welding speed. The welding results were visually satisfactory for the approximate joint length of 200 mm. The joints strength was almost constant regardless of the welding speed. The joint ef ciency was about 90% of that of the base material, while the elongation of the joints was about 50% of that of the base material. The hardness distribution of the joints was almost the same as that of the base material regardless of the heat input, which corresponds to the tensile test results.

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Effect of Welding Parameters on Weld Formation and Mechanical Properties in Dissimilar Al Alloy Joints by FSW

Cited by 38 publications

References 22 publications

Influences of Pin Shape on a High Rotation Speed Friction Stir Welding Joint of a 6061-T6 Aluminum Alloy Sheet

Influences of Pin Shape on a High Rotation Speed Friction Stir Welding Joint of a 6061-T6 Aluminum Alloy Sheet

A review on friction stir welding, parameters, microstructure, mechanical properties, post weld heat treatment and defects

A Feasibility Study on the Three-Dimensional Friction Stir Welding of Aluminum 5083-O Thin Plate

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