Effects of alkali-metal impurities on fracture toughness of 2090 Al-Li-Cu extrusions

Sweet, E.; Bennett, Chris; Musulin, I.; Lynch, S.P.; Nethercott, R.B.

doi:10.1007/bf02595445

Cited by 24 publications

(7 citation statements)

References 27 publications

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“…Deformation during the process, especially during void coalescence, occurs to some extent behind the crack tip and produces slip steps on the fracture surface. LME by internal phases can produce a similar appearance to that observed [30], but was not considered possible in this case since the operating temperature of the valve (up to 140°C) was well below the melting point of lead (327°C). Surface-self-diffusion of lead can occur at significant rates even at room temperature, and would be relatively rapid at 140°C-but not so rapidly that embrittlement would occur at high crack growth rates.…”

Section: Failure Of a Brass Valve In An Aircraft Engine Oil-coolermentioning

confidence: 55%

Failures of Structures and Components by Metal-Induced Embrittlement

Lynch

2008

J Fail. Anal. and Preven.

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The basic aspects of liquid-metal embrittlement (LME) and solid metal-induced embrittlement (SMIE) are concisely reviewed, followed by case histories of failures involving (i) LME of an aluminium-alloy pipe by mercury in a natural-gas plant, (ii) SMIE of a brass valve in an aircraft-engine oil-cooler by internal lead particles, (iii) LME of a cadmium-plated steel screw from a crashed helicopter, (iv) LME of a cold-formed steel stiffener during galvanizing, and (v) LME of a steel gear by a copper alloy from an overheated bearing. These case histories illustrate how failures by LME and SMIE can be diagnosed and distinguished from other failure modes. The underlying causes of the failures and how they might be prevented are also discussed. Several beneficial uses of LME in failure analysis are then outlined.

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Section: Failure Of a Brass Valve In An Aircraft Engine Oil-coolermentioning

confidence: 55%

Failures of Structures and Components by Metal-Induced Embrittlement

Lynch

2008

J Fail. Anal. and Preven.

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“…Brittle islands are centered on sites where liquid NaÀK phases had been present (Sweet et al, 1996). Brittle islands are centered on sites where liquid NaÀK phases had been present (Sweet et al, 1996).…”

Section: Alkali-metal Impurity Phasesmentioning

confidence: 99%

Fracture Toughness and Fracture Modes of Aerospace Aluminum–Lithium Alloys

Lynch

Wanhill

Byrnes

et al. 2014

Aluminum-Lithium Alloys

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“…[1–3]. It is known that the shape, size, and polycrystallinity significantly alter the stability and properties of the materials [1–10]. The polycrystalline diamond grown by chemical vapor deposition (CVD) has a high‐tensile strength varying from 180 to 5190 MPa, fracture toughness from 5.3 to 8 MN m −3/2 [4–6].…”

Section: Introductionmentioning

confidence: 99%

Atomistic simulations of ∑3 [110](111) grain boundary in diamond: Structure, stability, and properties

Pooja

Pawar

2022

Int J of Quantum Chemistry

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Grain boundaries play a pivotal role to influence the stability and mechanical properties of the diamond derived from chemical vapor deposition; therefore, the scrutiny of grain boundaries has aroused intensive research attention. In the present study, the structure, stability, mechanical, electronic properties, and concentration effect of the ∑3 [110](111) grain boundary in diamond has been investigated using density functional theory calculations. The grain boundary energy (γGB), phonon dispersion relation, and charge density distribution clearly indicate that the ∑3 [110](111) grain boundary in diamond is stable. The elasticity and electronic properties of the diamond with the ∑3 [110](111) grain boundary closely resemble the pristine diamond. En route to determining the thermal stability of the grain boundary, molecular dynamics simulations using ReaxFF were performed at various temperatures. In addition, Young's modulus was calculated by applying an increasing 5.6% uniaxial strain along the z‐direction during the molecular dynamics simulations using ReaxFF. The ReaxFF simulations further demonstrate that the grain boundary is found to be thermally stable even at 1773.15 K.

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Effects of alkali-metal impurities on fracture toughness of 2090 Al-Li-Cu extrusions

Cited by 24 publications

References 27 publications

Failures of Structures and Components by Metal-Induced Embrittlement

Failures of Structures and Components by Metal-Induced Embrittlement

Fracture Toughness and Fracture Modes of Aerospace Aluminum–Lithium Alloys

Atomistic simulations of ∑3 [110](111) grain boundary in diamond: Structure, stability, and properties

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