Cyclic deformation of single crystals of iron–silicon alloys oriented for single slip

Šesták, B.; Novák, V.; Libovický, S.

doi:10.1080/01418618808204675

Cited by 55 publications

(3 citation statements)

References 37 publications

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“…During the early stages of fatigue in b.c.c. metals, dislocation cells [27,28] and wall structures [27,29,30] as well as dislocation-poor channels [30][31][32] evolve. Only one work found ladder-like dislocation structures for low-carbon steel, [31] and the reason for this is still under discussion.…”

Section: Introductionmentioning

confidence: 99%

How Hydrogen Affects the Formation and Evolution of Persistent Slip Bands in High‐Purity α‐Iron

Schaefer

Geyer

2023

Adv Eng Mater

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The effect of hydrogen on the fatigue behavior of materials has been studied extensively during the past 100 years, but is just poorly understood due to the complex interplay between hydrogen and deformation processes. In this context, hydrogen damage of metals is becoming one of the major challenges of decarbonization. While most work focuses on f.c.c. materials, the availability of relevant results becomes sparse when considering technologically highly relevant b.c.c. metals such as structural steels. This work uses in situ electrochemical hydrogen charging of α‐iron steels to investigate the formation and evolution of intrusions and extrusions prior to fatigue crack initiation using a new charging setup by which the specimens are charged from the interior. The advantage of this innovative technique is that the surface of the specimens can subsequently be characterized using atomic force microscopy without artefacts from electrochemical charging or corrosion. Hydrogen is shown to enhance slip localization at the early stages of damage. The developed persistent slip lines are less pronounced. By means of transmission Kikuchi diffraction, it is shown that orientation gradients between cells in the dislocation structure are much weaker in the presence of hydrogen. Hence, hydrogen appears to promote slip reversibility in b.c.c. materials.

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Section: Introductionmentioning

confidence: 99%

How Hydrogen Affects the Formation and Evolution of Persistent Slip Bands in High‐Purity α‐Iron

Schaefer

Geyer

2023

Adv Eng Mater

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“…[3,4,5]) whereas slip bands in body-centered cubic (bcc) materials have been less investigated (e.g. [5,6,7]).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Three-Dimensional Shape of Slip Bands in Fatigued Dual Phase Steel

Zellmer

Tereschenko

Brueckner-Foit

et al. 2014

AMR

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The formation and the three-dimensional shape of slip bands in a fatigued dual phase steel were analyzed with the purpose of understanding the relation between fatigue crack initiation and the topography development on the specimen surface. Fatigue tests with small dog-bone-shaped specimens were conducted under fully reversed axial loading (R = -1) with a constant stress amplitude and were interrupted when the first slip bands occurred and at defined numbers of load cycles, respectively. Subsequently the surface topography of the specimen was investigated with a white light interferometer with hundredfold magnification and high numerical aperture (NA = 0.9) which allows analyzing the surface of individual grains. The results were confirmed by additional atomic force microscopy measurements. Based on this analysis the height, width and length of the slip bands are known at different stages of the fatigue process. The results obtained using white light interferometry and AFM, were checked by cutting individual slip bands with the help of focused ion beam thus revealing the true shape of the slip bands.

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“…The samples with well-characterised crystallography have frequently been used to study structurally dependent properties. Single crystals of metals are used in studies of e.g., dislocation motion during plastic deformation [1] and shape memory effect [2]. Bicrystals -two crystals separated by the grain boundary -are needed to study grain boundary migration [3] and segregation [4].…”

Section: Introductionmentioning

confidence: 99%

Growth of Metallic Crystals by Floating Zone Technique with Optical Heating

Lejček

Kopeček

2007

MSF

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Cyclic deformation of single crystals of iron–silicon alloys oriented for single slip

Cited by 55 publications

References 37 publications

How Hydrogen Affects the Formation and Evolution of Persistent Slip Bands in High‐Purity α‐Iron

How Hydrogen Affects the Formation and Evolution of Persistent Slip Bands in High‐Purity α‐Iron

Investigation of the Three-Dimensional Shape of Slip Bands in Fatigued Dual Phase Steel

Growth of Metallic Crystals by Floating Zone Technique with Optical Heating

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