Epitaxial stress and texture in thin oxide layers grown on Fe–Al alloys

Brito, Pedro; Pinto, Haroldo Cavalcanti; Genzel, Ch.; Klaus, Manuela; Kaysser-Pyzalla, Anke R.

doi:10.1016/j.actamat.2011.11.033

Cited by 22 publications

(9 citation statements)

References 50 publications

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“…10,42) In case of α-Fe2O3 with a strong preferential crystallographic orientation in the normal direction of the (0001) basal plane, the texture strength is thought to be driven by the low surface energy (1.52 J m -2 ) of the (0001) plane of α-Fe2O3. 41) The rolling texture of α-Fe2O3 has a strong {0001}<1010> component (Fig. 6) which is a direct consequence of the favoured basal plane slip.…”

Section: Discussionmentioning

confidence: 99%

“…Similar result has been recently reported for other single crystal oxide scales. 41) In addition to the texture developed in undeformed oxide scale, the variation of crystallographic planes is dominant in Fe3O4 and α-Fe2O3 as the different ORs of steel substrate. 17,19,29) For most polycrystalline substrates, a noticeable feature in Fe3O4 is the evolution of crystallographic direction, whereas the texture evolution of α-Fe2O3 varies in the crystallographic planes.…”

Section: +mentioning

confidence: 99%

“…Nevertheless, α-Fe2O3 is totally another story before and after deformation of oxide scale. The undeformed α-Fe2O3 formed at low-temperature oxidation has the {1120} and {1010} fibre textures, 29,41) whereas the rolling texture of α-Fe2O3 has a strong {0001}<1010> component (Fig. 5).…”

Section: +mentioning

confidence: 99%

“…17,40) Nonetheless, α-Fe2O3 in a trigonal structure generally has independent slip systems, namely {0001}<2 0>, {1210}<1010>, {1210}<1011>, {1102}<0111>, and {1010}<0111>. 36,39,41) In this case, the rolling texture development of α-Fe2O3 may attribute to the effect oxygen content through changes of the critical resolved shear stress of the various slip systems.…”

Section: )mentioning

confidence: 99%

“…For a fcc crystal interfaced to a trigonal close packed (hcp) crystal, the preferred orientation relationships are given by (111)fcc//(0001)hcp and (110)fcc,//(1010)hcp, where the close-packed planes and directions are matched across the interface. 40,41) Given that the formed Fe3O4 after thermodynamically unstable Fe1-xO has <001> fibre texture (Fig. 6), and also the interplanar angle between (111) and (001) that if α-Fe2O3 grows on a (100) Fe3O4, its grains will be titled at an angle of 54.76° to the Fe3O4 matrix, whereas for a (111) Fe3O4, the epitaxial growth of α-Fe2O3 (0001) will occur.…”

Section: +mentioning

confidence: 99%

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Crystallographic Texture Based Analysis of Fe3O4/α-Fe2O3 Scale Formed on a Hot-rolled Microalloyed Steel

Jiang

Zhao

et al. 2015

ISIJ Int.

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Oxide scale formed on the strip surface during hot rolling has posed a serious obstacle to ensure a defect-free surface of steel products in an ecologically friendly way. Recently, an influential idea is that the tertiary oxide scale with a tailored texture can be expected to enhance surface quality and tribolgoical properties during particular lubrication. In this study, texture evolutions of magnetite (Fe3O4) and hematite (α-Fe2O3) in deformed oxide layers formed on a hot-rolled microalloyed steel were investigated by electron back-scattering diffraction (EBSD). Fe3O4 develops a strong θ fibre parallel to the oxide growth, and α-Fe2O3 has a dominant {0001}<1010> texture component. This could be explained by surface energy minimisation during oxides growth and transformation between two oxides, which can also be affected by propagation of cracks along high angle grain boundaries in Fe3O4. Our data further demonstrate that a high thickness reduction (>28%) can reduce α-Fe2O3 wedging through Fe3O4 cracks, and tailoring Fe3O4 texture to {111} components can prevent the α-Fe2O3 growth titling 54.76° from the <001> crystal direction of Fe3O4. As such, these means can dramatically alleviate disturbance from 'red scale' (α-Fe2O3) during high-temperature steel processing.

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Section: Discussionmentioning

confidence: 99%