Effect of Aging Time on Microstructure and Mechanical Properties of Aa6061 Friction Stir Welding Joints

Ahmad, R.; Asmael, Mohammed

doi:10.15282/ijame.11.2015.17.0198

Cited by 11 publications

(6 citation statements)

References 13 publications

(15 reference statements)

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“…A simple artificial aging treatment was able to enhance the tensile properties of his specimen which is 3mm plate aluminium alloy 6061. From the result, it shows an increment of tensile strength from 0.3% to 4.7% when the time of aging was increased [31]. Another aging condition which is the natural aging is a process of aging in which the specimens were put through in a room temperature for a period of time [23].…”

Section: Agingmentioning

confidence: 97%

An Overview on Forming Process and Heat Treatments For Heat Treatable Aluminium Alloy

Yahaya¹,

Azmi²,

Huat³

et al. 2020

ARFMTS

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Weight reduction and material substitution were increasing trends in the automotive industry due to the growing demand for more fuel-efficient vehicles to reduce energy consumption nowadays. The characteristic properties of aluminium alloy which includes high strength stiffness to weight ratio, good corrosion resistance, and high recycling potential make it the ideal candidate to replace the other materials (Steel or copper) currently used in cars. The replacement to aluminium alloy parts is on par to the weight reduction demand within automotive industry. The focus on lightweight had also brought the attention on the high strength Aluminium alloy. Its high mechanical properties and excellent strength to weight ratio had made it suitable for car frame parts. In order to improve its mechanical properties, the heat treatment technique make it the suitable process to implement in aluminium alloy for produce the car body parts. The process of heat treatment was same as hot stamping technique which is this process was to improve its mechanical properties. Hence, in order to define and identified the heat treatment technique available, this paper had reviewed on the development of forming process and heat treatment condition applied toward aluminium alloy throughout the years.

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Section: Agingmentioning

confidence: 97%

An Overview on Forming Process and Heat Treatments For Heat Treatable Aluminium Alloy

Yahaya¹,

Azmi²,

Huat³

et al. 2020

ARFMTS

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“…This layer assists in the welding process because Zn has good metallurgical compatibility with both aluminium and steel [15,20,27,28]. Other than that, many researchers have also pointed out that the base and filler metal elements have a significant effect on the joint strength [29][30][31]. In this study, a detailed investigation on aluminium-galvanized iron dissimilar welding is conducted.…”

Section: Introductionmentioning

confidence: 99%

Lap joint dissimilar welding of aluminium AA6061 and galvanized iron using TIG welding

Shah¹,

Mohamad²,

Yaakob³

et al. 2016

J. Mech, Eng, Sci.

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In this paper, aluminium AA6061-O and galvanized iron were lap-joined using tungsten inert gas (TIG) welding. The experiments were conducted using Si-rich filler metals ER4043 (Si 5 wt.%) and ER4047 (Si 12 wt.%). The mechanical properties and the microstructure of the samples were analysed using dye penetrant non-destructive tests (NDT), optical microscope observation and shear tests. All samples showed good quality joints, with Al-GI specimens showing better quality. Through optical microscope observation, the intermetallic compounds (IMC) of specimens using ER4043 fillers show a thin IMC layer ranging from 4 µm to 7 µm, compared to ER4047 samples which ranged between 20 µm and 40 µm. The shear tests show that the GI-Al group fractured at the IMC layer, while the Al-GI group fractured at the FZ-HAZ aluminium matrix. The highest shear strength value obtained was 89.82 MPa and 76.59 MPa for the Al-GI and GI-Al positions, respectively. It can be concluded that the GI-Al (galvanized iron on top and aluminium at the bottom) configuration with filler type ER4043 (Si 5 wt.%) has the optimum mechanical properties with a thin IMC layer and tensile strength of 76.59 MPa.

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“…Each zone experiences dissimilar plastic deformations, leading to different shapes of microstructure. In order to produce a sound welding joint, welding parameters such as rotational speed, transverse speed, and position of the metals either on the advancing or retreating side should be considered during the FSW process [13][14][15]. Research by Dawood et al [16] found that reduction in surface roughness reduces friction and narrows down the HAZ at the welding joint.…”

Section: Introductionmentioning

confidence: 99%

Friction stir welding of similar and dissimilar aluminium alloys for automotive applications

Selamat

Baghdadi

Sajuri³

et al. 2016

Int. J. Automot. Mech. Eng.

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Aluminium alloys are lightweight materials relatively used in automotive industries. However, welding using the conventional welding methods is known to be difficult. In this study, the friction stir welding (FSW) known as the solid state joining process was extensively used for joining similar and dissimilar 5 mm aluminium alloy plates. The butt-joint type of similar joints (AA5083-AA5083) and dissimilar joints (AA5083-AA6061) were carried out under the same welding parameters; 1000 rpm (rotational speed) and 100 mm/min (transverse speed). Macro-and microstructural observations were acquired at the cross-section of the weld regions by stereo and optical microscopes. The microstructural study showed that the formation of 'onion ring' structure was detected in the nugget zone of similar joints, while wavy and distorted patterns appeared in dissimilar joints. All tensile specimens of similar welding joint showed similar fracture patterns where all fractures occurred in the thermo-mechanically affected zone (TMAZ). However, tensile specimens of dissimilar welding joint broke up at the TMAZ region as well as at Al6061 base metal at the retreating side. The tensile strength of similar joint and dissimilar joint was 22% and 19% lower compared to the base metal of Al5083 and Al6061.

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Effect of Aging Time on Microstructure and Mechanical Properties of Aa6061 Friction Stir Welding Joints

Cited by 11 publications

References 13 publications

An Overview on Forming Process and Heat Treatments For Heat Treatable Aluminium Alloy

An Overview on Forming Process and Heat Treatments For Heat Treatable Aluminium Alloy

Lap joint dissimilar welding of aluminium AA6061 and galvanized iron using TIG welding

Friction stir welding of similar and dissimilar aluminium alloys for automotive applications

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