Stability of grain-refined reversed structures in a 301LN austenitic stainless steel under cyclic loading

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00478100" target="_blank" >RIV/68081723:_____/17:00478100 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.msea.2017.07.033" target="_blank" >http://dx.doi.org/10.1016/j.msea.2017.07.033</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2017.07.033" target="_blank" >10.1016/j.msea.2017.07.033</a>

Result language

angličtina

Original language name

Stability of grain-refined reversed structures in a 301LN austenitic stainless steel under cyclic loading

Original language description

Austenite stability against the deformation induced alpha-martensite (DIM) formation and the cyclic deformation behavior of grain-refined structures with the grain size between 13 and 0.6 micrometer under fatigue loading were investigated in a 301LN Cr-Ni austenitic stainless steel. The DIM transformation in the course of cycling at constant total strain amplitudes of 0.4% and 0.6% was recorded by magnetic measurements and microstructures examined by electron backscatter diffraction and X-ray diffraction. The cyclic deformation behavior was followed by the evolution of the stress amplitude. The results evidenced that the austenite stability increases with the decreasing average grain size down to about one micrometer, obtained in annealing at 900 °C for 1 s. On the contrary, the stability decreases drastically in the submicron, non-homogeneous grain structures created at the lower temperatures of 800–700 °C. In these structures, submicron grains seem to be stable, and the precipitation of CrN is considered to contribute to the reduced stability of grains with a few-micron-size present among submicron grains. Under cyclic loading, the level of initial stress amplitude varied considerably in dependence on the refined austenite grain size. At the 0.6% strain amplitude, the initial softening was followed by cyclic hardening. The level of the final stress amplitude was related to the fraction of DIM formed during cycling straining.

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

<a href="/en/project/GA13-32665S" target="_blank" >GA13-32665S: Fatigue damage mechanisms in ultrafine grained stainless steels</a><br>

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

703

Issue of the periodical within the volume

4

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

280-292

UT code for WoS article

000412034600032

EID of the result in the Scopus database

2-s2.0-85026227774