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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Song, G.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2021Compositional complexity dependence of lattice distortion in FeNiCoCrMn high entropy alloy systemcitations
- 2020Compositional complexity dependence of dislocation density and mechanical properties in high entropy alloy systemscitations
- 2019Silica-free sealing glass for sodium-beta alumina batterycitations
- 2019A comparison study of dislocation density, recrystallization and grain growth among nickel, FeNiCo ternary alloy and FeNiCoCrMn high entropy alloycitations
- 2008Fractography of Stress Corrosion Cracking of Mg-Al Alloyscitations
- 2008Characterisation of stress corrosion cracking (SCC) of Mg-Al alloyscitations
- 2008Comparison of the linearly increasing stress test and the constant extension rate test in the evaluation of transgranular stress corrosion cracking of magnesiumcitations
- 2008Characterisation of stress corrosion cracking (SCC) of Mg–Al alloyscitations
- 2008A mechanistic understanding of stress corrosion cracking of Mg-Al alloys
- 2007Evaluation of the delayed hydride cracking mechanism for transgranular stress corrosion cracking of magnesium alloyscitations
- 2007Magnesium stress corrosion cracking
- 2007Stress corrosion cracking in magnesium alloys: Characterization and preventioncitations
- 2006Anodizing treatments for magnesium alloys and their effect on corrosion resistance in vaious environmentscitations
- 2004Corrosion resistance of aged die cast magnesium alloy AZ91citations
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article
Evaluation of the delayed hydride cracking mechanism for transgranular stress corrosion cracking of magnesium alloys
Abstract
This paper evaluates the important elements of delayed hydride cracking (DHC) for transgranular stress corrosion cracking (TGSCC) of Mg alloys. A DHC model was formulated with the following components: (i) transient H diffusion towards the crack tip driven by stress and H concentration gradients; (ii) hydride precipitation when the H solvus is exceeded; and (iii) crack propagation through the extent of the hydride when it reaches a critical size of ~0.8 µm. The stress corrosion crack velocity, Vc, was calculated from the time for the hydride to reach the critical size. The model was implemented using a finite element script developed in MATLAB. The input parameters were chosen, based on the information available, to determine the highest possible value for Vc. Values for Vc of ~10-7 m/s were predicted by this DHC model. These predictions are consistent with measured values for Vc for Mg alloys in distilled water but cannot explain values for Vc of ~10-4 m/s measured in other aqueous environments. Insights for understanding Mg TGSCC are drawn. A key outcome is that the assumed initial condition for the DHC models is unlikely to be correct. During steady state stress corrosion crack propagation of Mg in aqueous solutions, a high dynamic hydrogen concentration would be expected to build up immediately behind the crack tip. Stress corrosion crack velocities ~ 10-4 m/s, typical for Mg alloys in aqueous solutions, might be predicted using a DHC model for Mg based on the time to reach a critical hydride size in steady state, with a significant residual hydrogen concentration from the previous crack advance step.