Autonomous Filling of Grain-Boundary Cavities during Creep Loading in Fe-Mo Alloys

Zhang, S.; Fang, H.; Gramsma, M.E.; Kwakernaak, C.; Sloof, Willem G.; Tichelaar, F.D.; Kuzmina, Margarita; Herbig, Michael; Raabe, Dierk; Brück, E.; Zwaag, Sybrand van der; Dijk, Niels van

doi:10.1007/s11661-016-3642-0

Cited by 25 publications

(28 citation statements)

References 39 publications

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“…This is often non-volume conserving, thus creating compressive stresses that can close crack tips. Another approach is diffusion-driven pore filling during creep 63 . Since most corrosion phenomena are interface-dominated reactions involving mass transport (mostly of metal and oxygen ions), corrosion protection (particularly against oxidation) is among the most important and efficient means of enhancing product longevity.…”

Section: Longevity By Corrosion Protection Lifetime Extension and Reusementioning

confidence: 99%

Strategies for improving the sustainability of structural metals

Raabe

Taşan

Olivetti

2019

Nature

340

143

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Metagoods 16% Vehicles 13% Industrial equipment 16% Construction 55% Re ne Smelter Mine Fabrication Manufacture Use New Scrap Old Scrap Land ll Carbon scrap/nickel to other scrap markets Stock End-of-life products c Transportation 19% Electronics 5% Chemicals 1% Industrial machinery 30% Household appliances and metal goods 28% Building and infrastructure17% Mine Rutile Mill product Ti ingot Manufacturing scrap Mill scrap End-of-life products Use Ferrotitanium Ti sponge TiO 2 feed TiCl 4

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Section: Longevity By Corrosion Protection Lifetime Extension and Reusementioning

confidence: 99%

Strategies for improving the sustainability of structural metals

Raabe

Taşan

Olivetti

2019

Nature

340

143

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“…This mechanism was modelled by Karpov and coworkers [5]. Zhang and coworkers subsequently demonstrated that precipitation of substitutional solute leads to the self healing of creep cavities in Fe-Au and Fe-Mo alloys [6][7][8]. The creep defects and repairing precipitates were studied in detail for Fe-Au self-healing creep alloys, using X-ray nanotomography [9].…”

Section: Introductionmentioning

confidence: 99%

Finite element modelling of creep cavity filling by solute diffusion

Versteylen

Szymanski

Sluiter

et al. 2018

Philosophical Magazine

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“…In order to maintain a high energy barrier for nucleation in the matrix it is logical to search for other elements with an atom size that is significantly larger than iron, which are abundantly available. Recently, it was found that self‐healing of creep damage can indeed also be achieved in binary Fe–Mo alloys . In this system, the solubility of Mo is higher than Au at a temperature of 550 °C.…”

Section: Autonomous Healingmentioning

confidence: 96%

“…Micrographs (a–d) of the Fe–Mo alloy after creep for a stress of 160 MPa at a temperature of 565 °C demonstrating cavities and precipitation at grain boundaries parallel to the loading direction. Reproduced with permission . Copyright 2016, The Authors, published by Springer.…”

Section: Autonomous Healingmentioning

confidence: 99%

Self‐Healing Phenomena in Metals

Dijk

Zwaag

2018

Adv Materials Inter

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puters) would not be possible in their current form without highly developed metallic materials.Currently all metallic materials are developed along the so-called "damage prevention" paradigm, [1] i.e., their composition and microstructure are optimized such that the initiation and propagation of mechanical damage (in the form of internal damage such as pores or surface initiated cracks) leading to catastrophic failure of the product is postponed as much and as long as possible. Such a performance needs a careful tuning of the constituent atoms forming the matrix and its secondary phases, the grain size and the dislocation structure in the "pristine" state. Of course, the word "pristine" state is somewhat a misnomer as engineering metals generally have undergone multiple thermomechanical treatments once casted and are in a far-from-equilibrium state. Yet, in this context "pristine" metallic products are those in the shape and condition at the start of their life in an actual construction. All current metallic engineering materials have in common that once a local crack or defect is generated, either by the preceding plastic deformation or simply by mechanical overload of the material, this damage will remain forever and could be the initiator of the final catastrophic fracture event. In simple mathematical termsTypical examples of such an accumulation of microscopic damage leading to macroscopic failure are (low and high cycle) fatigue as well as creep failure. Generally speaking metallic systems perform very well under such conditions due to the high bond strength between the metallic atoms as well as a stable dislocation network, which tend to keep the atoms more or less in place or at least in registry, even in case of severe loading or deformation.The same positive attributes responsible for the excellent mechanical properties of metals are also the attributes for the modest success (in comparison to the field of self-healing polymers, [2][3][4] self-healing composites, [5] self-healing concrete [6] ) in developing self-healing metallic materials. For a material to become self-healing local processes leading to "local In comparison to other materials, in metals and metallic systems self-healing of cracks and crack-initiating defects is difficult to achieve due to the fact the solute atoms that act as healing agents are relatively small and generally have a relatively low mobility at the prevailing operating temperatures. In this review, the scientifically most interesting and industrially most promising approaches to self-healing metals are presented and discussed. The various approaches are separated in autonomous healing methods based on an intrinsic (solid-state diffusion) mechanism and assisted healing methods that need an external intervention. Some promising routes are identified while in other cases the approach has too many intrinsic limitations. Recently, a number of computational studies using molecular dynamics and finite element modeling have been performed to analyze the self-healing potential of...

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Autonomous Filling of Grain-Boundary Cavities during Creep Loading in Fe-Mo Alloys

Cited by 25 publications

References 39 publications

Strategies for improving the sustainability of structural metals

Strategies for improving the sustainability of structural metals

Finite element modelling of creep cavity filling by solute diffusion

Self‐Healing Phenomena in Metals

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