Cavitation behavior in superplastic 5083 Al alloy during multiaxial gas blow forming with lubrication

Sun, Pin Hou; Wu, Horng Yu; Lee, Wei song; Shis, Shyh hung; Perng, Jau yuean; Lee, Shyong

doi:10.1016/j.ijmachtools.2008.08.003

Cited by 15 publications

(6 citation statements)

References 18 publications

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“…The cavities will coalesce to form dimple that grow into void consequence to the fractures. The dispersion of fine cavities on the fracture surface is favourable to grain boundary sliding (GBS), hence the stress concentration by GBS can be reduced by the existence of cavities [39]. AA6061-AA5083 shows a fracture surface that is covered with dimples and voids with varying depths and sizes.…”

Section: Methodsmentioning

confidence: 99%

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

Selamat

Baghdadi

Sajuri³

et al. 2022

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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Section: Methodsmentioning

confidence: 99%

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

Selamat

Baghdadi

Sajuri³

et al. 2022

Int. J. Automot. Mech. Eng.

View full text Add to dashboard Cite

show abstract

“…(iii) When the temperature is lower than 900 • C, the m values decrease with the increase in strain rates. The deformability of the material decreases at higher strain rates, which may be due to the microstructural defects, i.e., voids and cavitations [23,24]. Cavitation is inevitable in the process of material deformation.…”

Section: Deformation Activation Energymentioning

confidence: 99%

Investigation of the Flow Behavior of Air-Cooling Ti-6Al-4V Alloy after Superplastic Forming

Xiao

Yang

et al. 2022

Crystals

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The flow behavior of Ti-6Al-4V alloy during the air-cooling process after superplastic forming (SPF) has been discussed. In high-temperature constant strain rate tensile tests, the selected temperatures were 930, 900, 800, 700, and 600 °C, and the initial strain rates were 10−2, 10−3, and 10−4/s. The optimized deformation temperatures were 800~900 °C and the strain rates were 10−4~10−3/s. Then, the evolutions of activation energy and deformation strain are also discussed, and the effects of dislocation density and deformation activation energy on flow behavior were consistent. In addition, unstable flow is mainly concentrated in the low-temperature and high strain-rate regions, and this is mainly caused by dynamic recrystallization (DRX). After the SPF process, the possibility of material damage gradually increases during the air-cooling process.

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“…The hot stamping-in-die quenching composite forming process (HFQ) for aluminum alloys was proposed by Lin [ 27 , 28 , 29 , 30 , 31 , 32 ]. This process is an ideal method for solving the problems of aluminum alloys at room temperature and is more productive than SPF [ 33 , 34 , 35 , 36 ]. Fan et al [ 37 ] investigated the HFQ process of 6A02 aluminum alloy sheets at different forming-die temperatures ranging from 50 °C to 350 °C and found the temperature should not be higher than 250 °C to obtain a sufficient strengthening effect.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Hot Stamping-in-Die Quenching Composite Forming Process of 5083 Aluminum Alloy Skin

Tang

et al. 2023

Materials

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Aluminum alloy has been used as the skin material for rail vehicles and automobiles to meet the requirements of environmental protection. The hot stamping-in-die quenching composite forming (HFQ) process is a promising technology to compensate for the poor formability of the aluminum alloy sheet at room temperature. In this paper, the high-temperature mechanical properties of 5083 aluminum alloy under various temperature (200 °C, 300 °C, 400 °C, 450 °C) and strain rate conditions (0.01 s−1, 0.10 s−1, 1.00 s−1) were investigated by uniaxial tensile tests. The finite element software of PAM-STAMP was employed to simulate the forming process of high-speed train skin. The effects of forming method and process parameters on the minimum thickness and springback of the skin were analyzed using the Response Surface Methodology (RSM). After parameter optimization, the forming experiment verified the simulation results and the test part met the quality requirements: the thickness above 3.84 mm and the springback within 1.1 mm. Mechanical properties of the sheet before and after HFQ were examined by uniaxial tensile tests at room temperature. It can be inferred from the comparison that the yield strength of the Al5083 sheet increases, but the elongation decreases from the HFQ process.

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Cavitation behavior in superplastic 5083 Al alloy during multiaxial gas blow forming with lubrication

Cited by 15 publications

References 18 publications

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

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

Investigation of the Flow Behavior of Air-Cooling Ti-6Al-4V Alloy after Superplastic Forming

Investigation of the Hot Stamping-in-Die Quenching Composite Forming Process of 5083 Aluminum Alloy Skin

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