A model of initial flaw sizes in aluminum alloys

DeBartolo, Elizabeth; Hillberry, B. M.

doi:10.1016/s0142-1123(01)00122-0

Cited by 34 publications

(16 citation statements)

References 11 publications

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“…DeBartolo and Hillberry [8] established that in many aluminum alloys used in the aircraft industry, fatigue cracks could be nucleated not only at macroscopic defects, such as machining marks and corrosion damage, but also at cracked constituent particles inherent to the alloy, formed during the solidification process.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Fracture Toughness and Mechanical Properties of Aluminum Alloy 7075, T6 with Nickel Coating

Kumar

Pramod

Kumar

et al. 2014

Procedia Engineering

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A study on mechanical and fracture properties, through the experimentation techniques has been carried out on a Al 7075-T6 and it coated with an Electroless Nickel deposits of 10 -20 μm in coating thickness. In the recent years there has been considerable interest in the Electroless Nickel plating due to its extensive use in electronics, automobiles, aerospace and other industries. Electroless Nickel plating is a controlled autocatalytic reduction of nickel ions using suitable reducing agent such as sodium hypophosphite. ASTM Standard -E 399 for plane strain fracture toughness determination was adhered in this investigation. The results obtained, show that the EN coating can give rise to a significant improvement in the fracture behavior (performance) of the substrate and also it has shown that EN coating exhibit a very good adhesive property to the alloy material when the tensile stresses exceeding the yield strength are applied to the system and performance of these pretreatments was studied by SEM analysis.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Fracture Toughness and Mechanical Properties of Aluminum Alloy 7075, T6 with Nickel Coating

Kumar

Pramod

Kumar

et al. 2014

Procedia Engineering

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“…Most of these studies, however, mainly focused on the effects of particle size, aspect ratio and density as measured on the sample surface on the crack initiation behaviors [4][5][6][7][8]. Little work has been done on the effects of 3-D geometry of the particles and micro-texture on crack initiation in high strength Al alloys.…”

Section: Introductionmentioning

confidence: 99%

A study of the effects of particle 3-dimensional geometry and micro-texture on fatigue crack initiation behaviors in an Al–Cu alloy using focused ion beam and electron backscatter diffraction

Wen

Ngan

Zhang

et al. 2013

Materials Science and Engineering: A

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“…Linear elastic fracture mechanics (LEFM) has been used to predict the fatigue life of a structural component containing a flaw, including damage-tolerant flaws, [10,11] corrosion pits, [12] constituent particles, [13,14] or casting defects [5,7,8,15] in metals. The fatigue crack growth rate in region II was first proposed by Paris and Erdogan, [16] as follows:…”

Section: Introductionmentioning

confidence: 99%

Fatigue Life Prediction for Porosity-Containing Cast 319-T7 Aluminum Alloy

Jang

Jeong

Yoon

et al. 2009

Metall Mater Trans A

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In this study, the linear elastic fracture mechanics (LEFM) approach, including use of the equivalent initial flaw size (EIFS) concept and fatigue crack propagation (FCP) rates, da/dN, as a function of either DK or DK eff , was used to predict the fatigue life of a porosity-containing 319-T7 specimen. The uniaxial fatigue tests were conducted on a 319-T7 specimen at a stress ratio (R) of À1. For the LEFM-based fatigue life prediction, da/dN-DK data were obtained for the 319-T7 specimen at R = 0.1. The shape and the size of the porosity were analyzed based on the fractographic and the micrographic analyses for each fatigued specimen. The LEFM concept, including the use of the EIFS value, back-calculated by using da/dN-DK eff data, successfully predicts the porosity-affected stress vs the number of cycles to failure (S-N) fatigue behavior of cast 319-T7 specimens. The LEFM models presently available for predicting the fatigue life of porosity-containing alloys were evaluated and a simple modification was proposed based on extensive fractographic analysis results.

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A model of initial flaw sizes in aluminum alloys

Cited by 34 publications

References 11 publications

Evaluation of Fracture Toughness and Mechanical Properties of Aluminum Alloy 7075, T6 with Nickel Coating

Evaluation of Fracture Toughness and Mechanical Properties of Aluminum Alloy 7075, T6 with Nickel Coating

A study of the effects of particle 3-dimensional geometry and micro-texture on fatigue crack initiation behaviors in an Al–Cu alloy using focused ion beam and electron backscatter diffraction

Fatigue Life Prediction for Porosity-Containing Cast 319-T7 Aluminum Alloy

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