scholarly journals Grain structure evolution during friction-stir welding of 6061-T6 aluminum alloy

2021 ◽  
Vol 1014 (1) ◽  
pp. 012015
Author(s):  
A Kalinenko ◽  
I Vysotskiy ◽  
S Malopheyev ◽  
S Mironov ◽  
R Kaibyshev
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Grain Structure ◽  
Structure Evolution ◽  
Friction Stir

Grain Structure Formation Ahead of Tool during Friction Stir Welding of AZ31 Magnesium Alloy

2010 ◽  
Vol 160 ◽  
pp. 313-318 ◽  
Author(s):  
Uceu Suhuddin ◽  
Sergey Mironov ◽  
H. Takahashi ◽  
Yutaka S. Sato ◽  
Hiroyuki Kokawa ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Magnesium Alloy ◽  
Structure Formation ◽  
Material Flow ◽  
Boundary Migration ◽  
Deformation Mode ◽  
Grain Structure ◽  
Az31 Magnesium Alloy ◽  
Structure Evolution ◽  
Friction Stir

The “stop-action” technique was employed to study grain structure evolution during friction-stir welding of AZ31 magnesium alloy. The grain structure formation was found to be mainly governed by the combination of the continuous and discontinuous recrystallization but also involved geometric effect of strain and local grain boundary migration. Orientation measurements showed that the deformation mode was very close to the simple shear associated with the rotating pin and material flow arose mainly from basal slip.

Grain structure evolution during friction-stir welding of AZ31 magnesium alloy

2009 ◽  
Vol 57 (18) ◽  
pp. 5406-5418 ◽  
Author(s):  
U.F.H.R. Suhuddin ◽  
S. Mironov ◽  
Y.S. Sato ◽  
H. Kokawa ◽  
C.-W. Lee
Keyword(s):  
Friction Stir Welding ◽  
Magnesium Alloy ◽  
Grain Structure ◽  
Az31 Magnesium Alloy ◽  
Structure Evolution ◽  
Friction Stir

scholarly journals Nanoindentation Hardness Distribution and Strain Field and Fracture Evolution in Dissimilar Friction Stir-Welded AA 6061-AA 5A06 Aluminum Alloy Joints

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Guangjian Peng ◽  
Yi Ma ◽  
Jiangjiang Hu ◽  
Weifeng Jiang ◽  
Yong Huan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Strain Field ◽  
Optical Microscope ◽  
Image Correlation ◽  
Grain Structure ◽  
Structure Evolution ◽  
Hardness Distribution ◽  
Slant Angle ◽  
Friction Stir

Aluminum alloy AA 6061-T651 and 5A06-H112 rolled plates were successfully welded by friction stir welding (FSW) at three rotation speeds of 600, 900, and 1200 rpm with two transverse speeds of 100 and 150 mm/min. Mechanical properties and strain field evolution of FSW AA 6061-AA 5A06 were characterized by the uniaxial tension and digital image correlation (DIC) tests. Furthermore, the hardness distribution map of whole cross section was obtained via the nanoindentation method with 700 indents. Both DIC and nanoindentation results reveal that the heat-affected zone (HAZ) of AA 6061 alloy is the softest area in the weldment, and the fracture happens in this region. The microstructure evolution characterized by electron-backscatter diffraction (EBSD) indicates that the continuous dynamic recrystallization is the primary grain structure evolution in the stirring zone, and the grain refinement helps improve the mechanical properties. Analyses of the micro- and macrofeatures of the fracture surfaces via scanning electron microscopy (SEM) and optical microscope suggest that the increasing of heat input could enlarge the size of HAZ and reduce the slant angle of HAZ and thus lead the fracture angle to decrease and cause the dimples change from inclined ones to normal ones.

scholarly journals Grain Structure Evolution during Friction-Stir Welding

2020 ◽  
Vol 23 (1) ◽  
pp. 21-31 ◽  
Author(s):  
S. Mironov ◽  
Y. S. Sato ◽  
H. Kokawa
Keyword(s):  
Friction Stir Welding ◽  
Grain Structure ◽  
Structure Evolution ◽  
Friction Stir

scholarly journals Effect of Stacking Fault Energy on the Grain Structure Evolution of FCC Metals During Friction Stir Welding

2020 ◽  
Vol 33 (7) ◽  
pp. 1001-1012 ◽  
Author(s):  
Xiaochao Liu ◽  
Yufeng Sun ◽  
Tomoya Nagira ◽  
Kohsaku Ushioda ◽  
Hidetoshi Fujii
Keyword(s):  
Friction Stir Welding ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Grain Structure ◽  
Structure Evolution ◽  
Friction Stir ◽  
Fcc Metals

scholarly journals Optimized Parameter for Butt Joint in Friction Stir Welding of Semi-Solid Aluminum Alloy 5083 Using Taguchi Technique

2021 ◽  
Vol 5 (3) ◽  
pp. 88
Author(s):  
Konkrai Nakowong ◽  
Kittima Sillapasa
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Welding Process ◽  
Butt Joint ◽  
Grain Structure ◽  
Shipbuilding Industry ◽  
Friction Stir ◽  
Semi Solid ◽  
5083 Aluminum Alloy

The semi-solid metal (SSM) 5083 aluminum alloy was developed for part manufacturing in the marine shipbuilding industry. This study aimed to optimize the parameters for the friction stir welding process of SSM 5083 aluminum alloy using the Taguchi and analysis of variance (ANOVA) techniques. Our analyses included tensile strength, hardness value, and the microstructure. The results revealed that the optimal parameters obtained for the tensile strength and hardness value in the stir zone (SZ) were A1B1C2 (1000 rpm, 10 mm/min, with a threaded cylindrical tool) with a tensile strength of 235.22 MPa and A2B1C2 (1200 rpm, 10 mm/min, with a threaded cylindrical tool) with a hardness value of 80.64 HV. According to the results obtained by ANOVA, it was found that the welding speed was the most significant process parameter in terms of influencing the tensile strength. Contrarily, no parameter influenced the hardness at a 95% confidence level. The examination using scanning electron microscopy (SEM) and an energy dispersive X-ray spectroscope (EDS) revealed an elongated grain structure and a void defect at the pin tip on the advancing side (AS) in the SZ. The particle distribution was uniform with Al2O3 and small porous SiO2 phases. Moreover, the quantities of C, O, Al, F, and Mg decreased.

Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

2020 ◽  
Vol 17 (3) ◽  
pp. 8150-8159
Author(s):  
Kulwant Singh ◽  
Gurbhinder Singh ◽  
Harmeet Singh
Keyword(s):  
Heat Treatment ◽  
Friction Stir Welding ◽  
Magnesium Alloys ◽  
Mechanical Performance ◽  
Fuel Efficiency ◽  
Research Work ◽  
Grain Structure ◽  
Tensile Fracture ◽  
Friction Stir ◽  
The Impact

The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.

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