Fatigue crack growth in 2024 aluminum alloy with inhomogeneous solidification microstructure

Kim, S. W.; Han, Sang Won; Zong, Jin

doi:10.1007/bf03027493

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…In order to systematically understand correlations between mechanical properties, fracture toughness, and microstructure, fracture mechanisms related with microstructures should be elucidated. A simple method used to investigate microfracture mechanisms is a phenomenological observation of fractured surfaces, and other experiments such as direct observation of crack initiation and propagation processes [7][8][9] and microscopic observation of deformed or fractured microstructures [10] have been conducted. The scope of the microfracture mechanism study has been extended as electron microscopes are widely used [11].…”

Section: Introductionmentioning

confidence: 99%

Effects of eutectic silicon particles on tensile properties and fracture toughness of A356 aluminum alloys fabricated by low-pressure-casting, casting-forging, and squeeze-casting processes

Lee

Kwon

Lee

2008

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Effects of eutectic silicon particles on tensile properties and fracture toughness of A356 aluminum alloys fabricated by low-pressure-casting, casting-forging, and squeeze-casting processes

Lee

Kwon

Lee

2008

Journal of Alloys and Compounds

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“…Aluminum alloys are commonly used in the automobile, electronic, computer industries and aircraft structural applications as they present relatively high strength-to-weight ratio, high toughness combined with good formability and weld-ability [1]. However, the application has been limited because of its bad corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of KI on the Corrosion Resistance of Ni-P Electroless Plating Coating

Liang

Zhang

Shi³

2014

AMM

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To improve the corrosion resistance of Ni-P electroless coating, the KI was added in the electroless solution. The surface micrograph was observed using scanning electron microscopy (SEM), and the corrosion resistance of Ni-P coatings in 3.5%NaCl solution was examined by polarization curves and electrochemical impedance spectroscopy (EIS). The experimental results showed that KI reduced the amount of defects and the size of crystal grain of Ni-P coating, and the surface of Ni-P coating became more homogenous, smoother and compact by KI. In addition, the phosphorus content of Ni-P coating was increased by KI. These factors increased the ability to corrosion protection of Ni-P coating.

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“…Several authors 1–5 have concentrated on fatigue crack growth (FCG) studies of different aluminium alloys. Various microstructural features such as Si morphology, secondary dendrite arm spacing (DAS) as well as heat treatment, porosity level, testing conditions, operating atmospheres, operating temperature, etc.…”

Section: Introductionmentioning

confidence: 99%

Fatigue crack propagation behaviour of Al-Zn-Ce alloys

Govindaraju¹,

Jayaraju²,

Rao³

2011

Fatigue &Amp; Fracture of Engineering Materials &Amp; Structures

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A B S T R A C T This paper presents the investigation on fatigue crack growth behaviour of Al-Zn andAl-Zn-Ce alloys. Fatigue tests were carried out on as-cast and heat-treated CT specimens according to ASTM E647 testing standard. The test results showed that the addition of rare earth element (cerium) and heat treatments (T6 and T5) had very strong influence on fatigue strength. This enhancement was due to metallurgical changes in the alloy system. Cerium eliminates the porosities and refines microstructures of the alloy, showing the improved fatigue crack growth behaviour. In addition, the fatigue fractured specimens were examined using a scanning electron microscope to clarify the fracture initiation points.cycles for crack initiation N f = number of cycles at specimen failure R = load ratio (P min /P max ) W = specimen width (mm) σ u = ultimate strength (MPa) K = stress intensity (MPa √ m) K th = threshold stress intensity (MPa √ m) CT = compact tension specimen HIP = hot isostatic process RHN = Rockwell hardness number SDAS = secondary dendritic arm spacing (μm) I N T R O D U C T I O NFatigue is an important parameter to be considered in the behaviour of mechanical components subjected to constant and variable amplitude loading. Mechanical, metallurgical and environmental variables can influence the fatigue resistance of a structural component. Fatigue is a primary cause of all engineering failure. The increased use of cast aluminium alloys in automotive applications creates the need for a deeper understanding of fatigue performance and the influence of processing parameters. The method of assessing the fatigue properties resulting from Correspondence: H. K. Govindaraju. E-mail: anchith_g_raj@yahoo.co.in different processing conditions require establishment of extensive database of rate of crack growth versus stress intensity (da/dN -K) information.Several authors 1-5 have concentrated on fatigue crack growth (FCG) studies of different aluminium alloys. Various microstructural features such as Si morphology, secondary dendrite arm spacing (DAS) as well as heat treatment, porosity level, testing conditions, operating atmospheres, operating temperature, etc. have been investigated. Si morphology influences on FCG of aluminium alloy, die cast alloys, Al -12% Si -0.35% Mg and rheocast alloys have been reported. Secondary dendritic arm spacing was observed to play an important role in the fatigue behaviour for different heat treating conditions of

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Fatigue crack growth in 2024 aluminum alloy with inhomogeneous solidification microstructure

Cited by 6 publications

References 10 publications

Effects of eutectic silicon particles on tensile properties and fracture toughness of A356 aluminum alloys fabricated by low-pressure-casting, casting-forging, and squeeze-casting processes

Effects of eutectic silicon particles on tensile properties and fracture toughness of A356 aluminum alloys fabricated by low-pressure-casting, casting-forging, and squeeze-casting processes

Effect of KI on the Corrosion Resistance of Ni-P Electroless Plating Coating

Fatigue crack propagation behaviour of Al-Zn-Ce alloys

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