A short review on aluminium alloys and welding in structural applications

Verma, Rajesh P.; Lila, Manish Kumar

doi:10.1016/j.matpr.2021.01.447

Cited by 41 publications

(13 citation statements)

References 13 publications

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“…With the development of society, more and more alloy systems are gradually discovered. Nowadays, the research of traditional alloys has become mature, such as iron alloys [1,2], aluminum alloys [3,4], magnesium alloys [5], titanium alloys [6], copper alloys [7,8], etc. The strength of materials can be improved by adding a small amount of non-metal or metal elements to the iron base; Aluminum alloy is to obtain different properties by adding different trace metal elements; magnesium alloy is to add trace rare earth elements to optimize the properties of the alloy [9,10].…”

Section: Development Of High-entropy Alloysmentioning

confidence: 99%

“…These RHEAs use nine refractory metal elements (Cr, Hf, Mo, Nb, Ti, Ta, V, W, and Zr), and these can also contain other metal elements, such as Al, Si, Co, and Ni. These added elements can reduce the density of the alloy (the density range is 13.8-5.6 g/cm 3 ). These elements also can form compounds to enhance alloys and affect other properties such as hardness and environmental resistance.…”

Section: Mechanical Properties Of Rheas Controlled By Alloying Elementsmentioning

confidence: 99%

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Development and Property Tuning of Refractory High-Entropy Alloys: A Review

Hua

Xing

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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In the past decade, multi-principal element high-entropy alloys (referred to as high-entropy alloys, HEAs) are an emerging alloy material, which has been developed rapidly and has become a research hotspot in the field of metal materials. It breaks the alloy design concept of one or two principal elements in traditional alloys. It is composed of five or more principal elements, and the atomic percentage (at.%) of each element is greater than 5% but not more than 35%. The high-entropy effect caused by the increase of alloy principal elements makes the crystals easy form body-centered cubic or face-centered cubic structures, and may be accompanied by intergranular compounds and nanocrystals, to achieve solid solution strengthening, precipitation strengthening, and dispersion strengthening. The optimized design of alloy composition can make HEAs exhibit much better than traditional alloys such as high-strength steel, stainless steel, copper-nickel alloy, and nickel-based superalloy in terms of high strength, high hardness, high-temperature oxidation resistance, and corrosion resistance. At present, refractory high-entropy alloys (RHEAs) containing high-melting refractory metal elements have excellent room temperature and high-temperature properties, and their potential high-temperature application value has attracted widespread attention in the high-temperature field. This article reviews the research status and preparation methods of RHEAs and analyzes the microstructure in each system and then summarizes the various properties of RHEAs, including high strength, wear resistance, high-temperature oxidation resistance, corrosion resistance, etc., and the common property tuning methods of RHEAs are explained, and the existing main strengthening and toughening mechanisms of RHEAs are revealed. This knowledge will help the on-demand design of RHEAs, which is a crucial trend in future development. Finally, the development and application prospects of RHEAs are prospected to guide future research.

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Section: Development Of High-entropy Alloysmentioning

confidence: 99%

Section: Mechanical Properties Of Rheas Controlled By Alloying Elementsmentioning

confidence: 99%

Development and Property Tuning of Refractory High-Entropy Alloys: A Review

Hua

Xing

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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“…Because of their excellent high strength/weight ratio and corrosion resistance, aluminum alloy components are widely used in the aerospace and railway vehicle fields [ 1 , 2 , 3 ]. During their manufacturing process and the subsequent long-time service, some defects occur inevitably, such as fusion welding defects (porosity and cracks) [ 4 ], corrosion pits [ 5 ], wear [ 6 ], fatigue cracks [ 7 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on Weld Quality in Vortex- Friction Stir Welding of 6061-T6 Aluminum Alloy

Liu

Zhen

et al. 2023

Materials

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Vortex-friction stir welding (VFSW) utilizes a stir bar made of an identical material to the workpiece to rub the workpiece’s top surface, which avoids the keyhole defect in conventional friction stir welding. It presents great potential in the repair field of aluminum alloys. In this study, the effect of stir bar diameter, rotation speed, and welding speed on the weld formation was investigated in the VFSW of 6061-T6 aluminum alloy. The weld macrostructure, penetration, and mechanical properties were characterized. The results show that a large diameter of the stir bar can enhance the vortex material flow, increase the heat input, and eliminate the incomplete-penetration defect. The increase in rotation speed within limits can enhance the weld penetration and the mechanical properties of the weld nugget zone (WNZ). However, too high a rotation speed reduces the weld penetration and weakens the mechanical properties of the WNZ. The increase in welding speed reduces the weld penetration but enhances the mechanical properties of the heat affected zone. The incomplete-penetration defect significantly weakens the ductility of the VFSW joint. It can be eliminated by enlarging the stir bar diameter and choosing a moderate rotation speed and a lower welding speed.

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“…7XXX series aluminium alloy is known as ultrahigh strength aluminium alloy, which is widely used in aerospace, automobile manufacturing and other advanced industrial fields due to its low-density, great corrosion resistance and fatigue performance [1][2][3][4][5][6][7][8]. The traditional preparation process of 7XXX series aluminium alloy is a semi-continuous casting method, which contains many defects, such as shrinkage cavity, oxide inclusion, large ingo's crack, etc.…”

Section: Introductionmentioning

confidence: 99%

Ellipsoidal equiaxial grain of 7055 aluminium alloy in vacuum centrifugal casting

Yin

Qian

et al. 2023

Materials Science and Technology

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The 7055 aluminium alloy cast tube was prepared by vacuum centrifugal casting technology. The radial and axial microstructure of the alloy was observed by optical microscope and electron probe. The results showed that the as-cast microstructure is uniform and fine equiaxed, and intermetallic compounds are distributed at grain boundaries. In addition, the circumferential grain size and the number of intermetallic compounds were larger than that in the axial direction. The grains are ellipsoidal and equiaxed. This is the result of directional heat conduction, solid solubility migration and redistribution of solute during the solidification process of centrifugal casting. After homogenisation, the grains tend to be spherical equiaxed crystals, which is the result of different degrees of recrystallisation in the circumferential and axial directions.

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A short review on aluminium alloys and welding in structural applications

Cited by 41 publications

References 13 publications

Development and Property Tuning of Refractory High-Entropy Alloys: A Review

Development and Property Tuning of Refractory High-Entropy Alloys: A Review

Effect of Process Parameters on Weld Quality in Vortex- Friction Stir Welding of 6061-T6 Aluminum Alloy

Ellipsoidal equiaxial grain of 7055 aluminium alloy in vacuum centrifugal casting

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