Microstructure and dislocation arrangements in Sanicro 25 steel fatigued at ambient and elevated temperatures

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00480482" target="_blank" >RIV/68081723:_____/17:00480482 - isvavai.cz</a>

Alternative codes found

RIV/00216305:26210/17:PU121337

Result on the web

<a href="http://dx.doi.org/10.1016/j.msea.2016.10.076" target="_blank" >http://dx.doi.org/10.1016/j.msea.2016.10.076</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2016.10.076" target="_blank" >10.1016/j.msea.2016.10.076</a>

Result language

angličtina

Original language name

Microstructure and dislocation arrangements in Sanicro 25 steel fatigued at ambient and elevated temperatures

Original language description

Microstructure and dislocation structures in high alloyed heat resistant Sanicro 25 austenitic steel cyclically strained in a wide interval of constant strain amplitudes both at room temperature and at temperature of 700 degrees C were studied by means of transmission electron.microscopy (TEM). The spatial arrangement of dislocations was determined using the technique of oriented foils. The character and the Burgers vectors of dislocations were determined. It was found that at room temperature strong planarity of dislocation slip prevails. Cyclic plastic deformation is localized into thin bands of high dislocation density which have different structure than ladder like arrangement. No distinctive wall and channel dislocation configurations were observed but bands have character of alternating dislocation rich and dislocation poor areas. Pronounced plastic strain localization leads to cyclic softening. In high temperature cyclic straining enhanced cross-slip leads to substantial increase of dislocation density. Objects of nanometer size coherent with the matrix were found simultaneously with the evidence indicating pinning of dislocations. The high dislocation density, its homogeneous distribution and interaction of nanoclusters and gliding dislocations are the cause of exceptional cyclic hardening of this material at high temperatures. Due to this hardening, the saturated cyclic stress at 700 degrees C is remarkably high.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20306 - Audio engineering, reliability analysis

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Materials Science and Engineering A-Structural materials

ISSN

0921-5093

e-ISSN

—

Volume of the periodical

680

Issue of the periodical within the volume

JAN

Country of publishing house

CH - SWITZERLAND

Number of pages

14

Pages from-to

168-181

UT code for WoS article

000390495600020

EID of the result in the Scopus database

2-s2.0-84999008968