Effect of mechanical stresses on heterogeneous oxidation of metals

Rosenband, Valery; Gany, Alon; Timnat, Y. M.

doi:10.1007/bf01046751

Cited by 15 publications

(4 citation statements)

References 9 publications

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“…The Pilling-Bedworth ratio χ for aluminum and titanium (the ratio molar volume of oxide/molar volume of original metal) exceeds unity [6]. Taking into account oxidation of the metal [11,12], the interference ∆ determining the stress in the oxide layer is…”

Section: Stresses Resulting From the Oxidation Of A Metalmentioning

confidence: 99%

Thermo-mechanical aspects of the heterogeneous ignition of metals

Rosenband

2004

Combustion and Flame

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Section: Stresses Resulting From the Oxidation Of A Metalmentioning

confidence: 99%

Thermo-mechanical aspects of the heterogeneous ignition of metals

Rosenband

2004

Combustion and Flame

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“…In each subscale we have a stress distribution like in (12) and (13), with, in general, different oxidation-strain tensors in each subscale. We have in this case five unknowns, namely the radial interface stresses (metallic substrate/inner subscale and inner/outer subscale), which determine the distributions of the radial and hoop stresses, and the axial stresses in the three layers.…”

Section: Duplex-scale Oxidationmentioning

confidence: 99%

Growth Stresses in Oxidized Tubes Under Uni- and Multi-Axial Oxidation Strain

2006

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When metallic components operate in aggressive environments their service life is, in general, determined by the presence of a protective surface film which acts as a barrier to the reactants. Large residual stresses can result from the volume changes due to oxidation, the so-called growth stresses. These stresses may lead to film cracking or spalling or both. A visco-elastic model for the calculation of growth stresses in oxidizing tubes has been developed. It can deal with uniaxial and multi-axial oxidation strain tensors. Different oxidation modes like surface and interface oxidation as well as duplex scale formation are treated. It appears that even relatively small lateral oxidation-strain components could have a considerable effect on the stress level in the tube. A simplified version of the model has been applied to simulate the geometrical changes of Zry tube sections exposed to air having reached the break-away regime. We think that lateral oxidation strains were mainly responsible for the observed diameter increase.

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“…During heating in an inert atmosphere, the interference ∆, developed thanks to the mismatch of thermal expansion coefficients of the metal and its oxide or nitride, is equal to [10]:…”

Section: Discussionmentioning

confidence: 99%

“…To estimate the stress in the protective aluminum oxide or nitride layer, will consider the heating of a composite spherical aluminum particle of radius R 0 (metal core and initial outer oxide or nitride shell of δ 0 thickness). It is possible using an elastic model to write down the equivalent stress acting on the oxide or nitride layer [10,11]:…”

Section: Discussionmentioning

confidence: 99%