Preparation of millimeter scale second phase particles in aluminum alloys and determination of their mechanical properties

Lan, Xinyue; Li, Kai; Wang, Fuxin; Su, Yanqing; Yang, Mingjun; Liu, Shuhong; Wang, Jiong; Du, Yong

doi:10.1016/j.jallcom.2018.12.395

Cited by 27 publications

(8 citation statements)

References 44 publications

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“…The small and dispersive second phase was beneficial to improving the strength of the alloy since the short-rod and spherical secondary precipitates promoted the coordinated deformation and improved the overall fatigue properties of the alloy. Furthermore, large numbers of studies showed that gas (mainly hydrogen), oxidized inclusions (mainly Al 2 O 3 ), Fe-rich impurities, and second phases of different compositions in aluminum alloy melt would cause defects, such as pores and slacking in the ingot, directly or indirectly affecting the strength and toughness of aluminum alloys [11,38,48,49]. Impurities tended to form hard spots in aluminum and aluminum alloys, increasing the viscosity of aluminum alloy melt, reducing the casting performance, and promoting the formation of casting defects, such as loosening and shrinkage cavity [38].…”

Section: Effect Of Microstructure On Hcf Deformation Of 211zx Alloymentioning

confidence: 99%

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Zhong

Huang

Chen

et al. 2022

Metals

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In the present paper, the high cycle fatigue (HCF) of a novel 211Z.X aluminum alloy with high strength was studied under hot-rolling and as-cast states at room temperature. The effects of microstructure and distribution of precipitated phases and impurities on the mechanical properties, HCF performances, fatigue microcrack initiation, and propagation behavior of the 211Z.X alloy were studied by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The HCF S–N curves, P–S–N curves and Goodman fatigue diagrams of 211Z.X alloy consisting of two microstructures were drawn. The results suggested that the fine and dispersive distribution of the second phases improved the strength of the alloy. The formation of short-bar and spherical precipitates promoted coordinated deformation of the alloy. This promoted higher microcrack initiation resistance of 211Z.X alloy with a hot rolling state than in the cast state. As a result, the HCF properties of the hot-rolling alloy were better than those of the cast alloy. In sum, these results look promising for future reliable design of engineering structures and application of new aluminum alloys.

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Section: Effect Of Microstructure On Hcf Deformation Of 211zx Alloymentioning

confidence: 99%

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Zhong

Huang

Chen

et al. 2022

Metals

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“…Intermetallic phases detected may affect the average values: α-AlFeSi and β-AlFeSi are respectively ca. 883 HV and 765 ( [21]), Al-Mg ca. 48 HV [22], Al-Si ca.…”

Section: Weld Micro-hardnessmentioning

confidence: 99%

MIG and TIG Joining of AA1070 Aluminium Sheets with Different Surface Preparations

Fracchia

Bidulská

Bidulský³

et al. 2022

Materials

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In this work, AA1070 aluminium alloy sheets are joined using TIG and MIG welding after three different edge preparations. Shearing, water jet and plasma-cut processes were used to cut sheets, subsequently welded using ER5356 and ER4043 filler metals for TIG and MIG, respectively. Mechanical properties of the obtained sheets were assessed through tensile tests obtaining a relation between sheet preparation and welding tightness. Micro-hardness measures were performed to evaluate the effects of both welding and cutting processes on the micro-hardness of the alloy, highlighting that TIG welding gives rise to inhomogeneous micro-hardness behaviour. After tensile tests, surface fractures were observed employing scanning electron microscopy to highlight the relation between tensile properties and edge preparations. Fractures show severe oxidation in the water jet cut specimens, ductile fractures and gas porosities.

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“…However, the recrystallization fraction will be increased by high temperature, and long-term holding which will adversely affect the strength, fracture toughness, and stress corrosion resistance after aging. Therefore, a good solid solution regime should be able to dissolve the soluble second phase as much as possible into the aluminum matrix without significantly increasing the recrystallization fraction in the alloy [99].…”

Section: Solid Solutionmentioning

confidence: 99%

The Advancement of 7XXX Series Aluminum Alloys for Aircraft Structures: A Review

Zhou

Liu

Zhang

2021

Metals

165

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7XXX series aluminum alloys (Al 7XXX alloys) are widely used in bearing components, such as aircraft frame, spars and stringers, for their high specific strength, high specific stiffness, high toughness, excellent processing, and welding performance. Therefore, Al 7XXX alloys are the most important structural materials in aviation. In this present review, the development tendency and the main applications of Al 7XXX alloys for aircraft structures are introduced, and the existing problems are simply discussed. Also, the heat treatment processes for improving the properties are compared and analyzed. It is the most important measures that optimizing alloy composition and improving heat treatment process are to enhance the comprehensive properties of Al 7XXX alloys. Among the method, solid solution, quenching, and aging of Al 7XXX alloys are the most significant. We introduce the effects of the three methods on the properties, and forecast the development direction of the properties, compositions, and heat treatments and the solution to the corrosion prediction problem for the next generation of Al 7XXX alloys for aircraft structures. The next generation of Al 7XXX alloys should be higher strength, higher toughness, higher damage tolerance, higher hardenability, and better corrosion resistance. It is urgent requirements to develop or invent new heat treatment regime. We should construct a novel corrosion prediction model for Al 7XXX alloys via confirming the surface corrosion environments and selecting the accurate and reliable electrochemical measurements.

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Preparation of millimeter scale second phase particles in aluminum alloys and determination of their mechanical properties

Cited by 27 publications

References 44 publications

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

MIG and TIG Joining of AA1070 Aluminium Sheets with Different Surface Preparations

The Advancement of 7XXX Series Aluminum Alloys for Aircraft Structures: A Review

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