Showing papers on "Aluminium alloy published in 2010"
TL;DR: In this paper, a novel LDH-based nanocontainers of corrosion inhibitor are developed, which are composed by nanostructured layered double hydroxides with divanadate anions located in the interlayer regions.
454 citations
TL;DR: In this article, a numerical model is presented that predicts the corrosion rate of a galvanic couple, which is capable of tracking moving boundary of the corroding constituent of the couple.
181 citations
TL;DR: In this paper, the authors examined the properties of heat treated matrix alloy and composites and compared them with the T6 heat treatment regime, and found that wear resistance and coefficient of friction were better at the SiC particulate composites than at the Al2O3 composite, while the addition of graphite particles improved tribological properties further.
174 citations
25 Oct 2010-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, a non-metallic Si element is introduced to AlCoCrFeNiSi(x) alloys and the improvement of mechanical properties is attributed to the solid solution of Si element and precipitation strengthening of nanoscale cellular structure.
Abstract: By introducing nonmetallic Si element, AlCoCrFeNiSi(x) (x values in molar ratio, x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0) alloys are designed and prepared. One kind of nanoscale cellular structure forms due to the introduction of nonmetallic Si element. The alloy is composed mainly of BCC solid solution and possesses excellent room-temperature compressive mechanical properties. The excessive introduction of Si element leads to the precipitation of 8 phase at grain boundary. The improvement of mechanical properties is attributed to the solid solution of Si element and precipitation strengthening of nanoscale cellular structure. The precipitated 8 phase at grain boundary should be responsible for transition of alloy from plastic fracture to brittle fracture. Among them, Si(0.4) alloy exhibits excellent comprehensive mechanical properties, yield stress of 1481 MPa, fracture strength of 2444 MPa and plastic strain of 13.38%, respectively. (C) 2010 Elsevier B.V. All rights reserved.
160 citations
TL;DR: In this paper, the effects of process parameters and tool pin profile on tensile strength and tensile elongation of dissimilar friction stir welded joints are analyzed in detail, and the results are useful to fabricate the joints with desired tensile properties and to automate the FS welding process.
152 citations
TL;DR: In this article, an effect of matrix alloy and influence of SiC particle on the sliding wear characteristics of high strength aluminium alloys AA7010, AA7009 and AA2024 composites was examined under varying applied pressure and a fixed sliding speed of 3.35 m/s.
151 citations
TL;DR: Good high-temperature corrosion resistance of Fe-Al alloys in oxidizing environments is due to the alpha-Al2O3 film which is formed on the surface provided temperature is above 900 degrees C and th...
143 citations
TL;DR: In this article, a salt spray test according to DIN EN ISO 9227 (NSS) compared to conventional hot-dip galvanised zinc (Z) coating because of its ability to form a very stable, well adherent protecting layer of zinc aluminium carbonate hydroxide, Zn6Al2(CO3)(OH)16·4H2O.
131 citations
TL;DR: In this paper, the authors provided an experimental database on the riveting process using an aluminium self-piercing rivet, where two similar sheets in aluminium alloy 6060 in three different tempers (temper W, temper T4, and temper T6) have been joined by using a selfpierced rivet in three alloys, i.e. 6082-T6, 7108-T5, and 7278-T 6.
116 citations
TL;DR: In this article, an attempt was made to develop empirical relationships to predict grain size and tensile strength of friction-stir welded AA 6061-T6 aluminium alloy joints.
113 citations
TL;DR: In this article, the effect of material locations on the properties of friction stir welding joints of two dissimilar aluminium alloys was investigated by experiments, and the result of the microstructural analysis showed that the material mixing patterns in the FSW joints are quite different depending on the locations of the base metals.
Abstract: The effect of material locations on the properties of friction stir welding (FSW) joints of two dissimilar aluminium alloys was investigated by experiments. The result of the microstructural analysis shows that the material mixing patterns in the FSW joints are quite different depending on the locations of the base metals. For the given aluminium alloys, the materials were more properly mixed when the 5052-H32 aluminium alloy was in the advancing side and the 6061-T6 aluminium alloy was in the retreating side than the case of the 6061-T6 aluminium alloy in the advancing side and the 5052-H32 aluminium alloy in the retreating side. The lowest value of the microhardness measured in the heat affected zone (HAZ) of the 5052-H32 aluminium alloy side for the both FSW joints explains why the quasi-static tensile test specimens were fractured at the 5052-H32 side of joint for the both FSW joints.
TL;DR: In this article, a self-lubricating composite coating is fabricated on the surface of aluminium alloy, which integrates the advantages of wear resistance of microarc oxidation (MAO) ceramic coating and a low friction coefficient of polytetrafluoroethylene (PTFE).
Abstract: Self-lubricating composite coating is fabricated on the surface of aluminium alloy, which integrates the advantages of wear resistance of microarc oxidation (MAO) ceramic coating and a low friction coefficient of polytetrafluoroethylene (PTFE). Inspection of SEM and EDS analysis indicates that PTFE can be deposited into the MAO coating, and a compact film forms which can fully cover the MAO coating. The yielded coating possesses superior tribological properties. The friction coefficient remains steady with minimal weight loss during long-term sliding.
TL;DR: In this paper, a bottom-up approach was adopted to quantify the critical microstructural feature size (viz. precipitate size) that is capable of triggering a cascade of pitting events and eventual degradation of corrosion resistance.
TL;DR: In this paper, a U-slot shape of AA6056 sheet was machined at one end to a U -slot shape, enabling the intake of the Ti6Al4V sheet.
Abstract: Dissimilar welds of aluminium alloy AA6056 and titanium alloy Ti6Al4V were produced by a novel technique. AA6056 sheet was machined at one end to a U-slot shape, enabling the intake of the Ti6Al4V sheet. The Al-alloy U-slot was then butt welded by split laser beam without using a filling wire, thus making a weld by melting only the Al-alloy. Thereby the intermetallic brittle phase TiAl3 formed at the weld interface and affected mechanical properties. As a continuation of the previous work, the joint design was modified by chamfering Ti6Al4V to reduce the formation of interfacial TiAl3. It is shown in this work how this seemingly insignificant joint modification has refined microstructure and increased hardness and strength. The most impressive feature was the improved resistance to fatigue crack propagation whereby the fracture type in the fusion zone of AA6056 adjacent to the weld interface changed from partially intercrystalline to completely transcrystalline. Possible metallurgical processes leading to the property improvements are discussed.
TL;DR: In this article, the authors used potentiodynamic polarisation and EIS measurements to evaluate the corrosion behavior of the microarc oxidation (MAO) coated alloys and found that the corrosion process of the coated alloy can be divided into three stages: (1) the initial stage (the first 2-6h of immersion): penetration of corrosion medium into the aluminium alloy was inhibited by coating; (2) the second stage (after 24h of immersion), corrosion medium penetrated to attack the interface between the substrate and the coating; and (3) the final stage (
TL;DR: In this paper, the surface pre-treatment of the wrought aluminium alloy AW 6016 was performed using a laser to examine the influence of selected pretreatment parameters on the strength and aging resistance of the bonded joint.
TL;DR: In this article, an experimental and numerical investigation into the shear strength behavior of aluminium alloy adhesive lap joints was carried out in order to understand the effect of geometrical and manufacturing parameters on the strength of adhesive bonding joints, with the aim of optimizing shear-strength.
TL;DR: In this article, the effect of surface hardening by shot peening on electrochemical stability and corrosion fatigue properties of high-strength aluminium alloy 7075-T651 in the corrosive environment of a chloride solution was investigated.
TL;DR: In this paper, the corrosion behavior of Al, Al-In, Al -Sn and Al-Sn-In alloys in 2 M NaCl solution has been studied by using potentiodynamic polarization, open circuit potential and impedance measurements as well as volumetric determination of evolved hydrogen.
TL;DR: In this paper, the influence of various blends of hexafluorozirconic acid (Zr), polyacrylic-acid (PAA) and polyacrylamide (PAM) pretreatment on the performance of an epoxy coated aluminium substrate was investigated and compared to that of a so-called chromate/phosphate conversion coating (CPCC).
TL;DR: In this paper, a spectroscopic emission spectroelectrochemistry (AESEC) was used to monitor the release of Al from 99.99% aluminum (1199 alloy) and Al, Mg, and Cu from 2024 Al alloy in 30g/l NaCl electrolyte as a function of pH.
TL;DR: In this paper, the microstructural and mechanical behavior of resistance spot welds (RSW) done on aluminium alloy 6082-T6 sheets, welded at different welding parameters, is examined.
TL;DR: In this paper, high-energy wet ball milling was successfully employed to synthesize nano-crystalline Al 6063 alloy powders reinforced with 1.3 and 0.65vol.
TL;DR: In this paper, the surface corrosion behavior of AA2024-T3 aluminium alloy sheet after friction stir welding was investigated by using an in-situ observation method, and it was shown that the density and degree of the pitting corrosion in the shoulder active zone were slightly larger compared to the other regions on the top surface.
TL;DR: In this article, passivity and localized corrosion of ultrafine-grained (UFG) binary Al-alloys with 0.5, 1 and 2.5% of magnesium subjected to three different equal-channel angular pressing (ECAP) pass numbers were investigated.
TL;DR: In this article, a friction stir weldment of AA2219-T87 aluminium alloy was characterized for its microstructure, mechanical properties, corrosion resistance and stress corrosion cracking behaviour.
TL;DR: In this article, the authors investigated the fatigue resistance of FSW joints on an as-cast particulate reinforced aluminium based composite (AA6061/22/vol.%/Al 2 O 3p ).
TL;DR: In this paper, a tensile load is applied to a biaxial aluminium alloy specimen in the direction parallel to the crack front in addition to the fracturing load normal to the surface.
Abstract: It is generally believed that a lower bound on the fracture toughness of a material is obtained from a standard test in which a state of plane strain prevails, particularly in metals where yielding occurs prior to fracture. The understanding is that in such a test the material around the crack tip is highly constrained hence reducing the extent of yielding. In this paper we report the results of fracture tests where a tensile load is applied to a biaxial aluminium alloy specimen in the direction parallel to the crack front in addition to the fracturing load normal to the crack surface. We show that in this case a lower fracture toughness is measured than that obtained from a standard test. Indeed, for the highest value of tensile load used in our tests the J-integral at fracture was half the value measured in a standard test. It is also shown that the volume of the plastic region can be used to measure the effect of constraint, irrespective of the manner in which the constraint arises. This approach suggests an even lower fracture toughness may be obtained than that measured here in certain loading conditions.
TL;DR: In this paper, the authors developed microstructural numerical models of closed cell foam made of aluminium alloy by means of a finite elements code, the material cellular structure was shaped in different ways: firstly the Kelvin cell, with both plane and curved walls; finally an ellipsoidal cell defined by random dimensions, position and orientation has been adopted as base unit.
TL;DR: In this paper, the effects of microstructural modifications on both the high cycle fatigue and cyclic stress-strain response were investigated and it was shown that B addition markedly enhances the fatigue strength of the alloy; however, the influence of prior-β grain size was only marginal.