CHANGES IN DISLOCATION SUBSTRUCTURE OF S235JR STEEL DURING FATIGUE LOADING

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F14%3A%230000593" target="_blank" >RIV/47718684:_____/14:#0000593 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
CHANGES IN DISLOCATION SUBSTRUCTURE OF S235JR STEEL DURING FATIGUE LOADING
Original language description
Changes in dislocation substructure were studied in normalized and annealed S235JR steel in relation to the number of symmetrical reversed stress cycles with the amplitude ?a = 242 MPa and corresponding mean life Nf = 17,950 cycles. The microstructure ofthe steel consisted of ferrite with a small amount of pearlite. The substructure was observed in as received condition and after application of various relative numbers of cycles n/Nf, these being 0.25, 0.50 and 0.75. An irregular dislocation net occurred in the virgin specimen, however, during cyclic loading the dislocations started to accumulate gradually in slip bands and to form a cell substructure in grains of favourable crystallographic orientations. Total dislocation density, dislocation densityin slip bands and inter-band distance were measured using transmission electron microscopy (TEM). The total dislocation density was found to slightly decrease and the density in slip bands to increase with increasing number of cycles. Th
Czech name
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Czech description
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Project
<a href="/en/project/TE01020118" target="_blank" >TE01020118: Electron microscopy</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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