Austenite stability in reversion-treated structures of a 301LN steel under tensile loading

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00478101" target="_blank" >RIV/68081723:_____/17:00478101 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.matchar.2017.01.040" target="_blank" >http://dx.doi.org/10.1016/j.matchar.2017.01.040</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchar.2017.01.040" target="_blank" >10.1016/j.matchar.2017.01.040</a>

Result language

angličtina

Original language name

Austenite stability in reversion-treated structures of a 301LN steel under tensile loading

Original language description

Ultrafine-grained austenitic stainless steels can be produced by the martensitic reversion process, but the factors affecting the stability of refined austenite in subsequent deformation are still unclear. To clarify this, fully and partially austenitic reversed structures with the average grain size between 24 and 0.6 micrometer were created in a 60% cold-rolled 301LN type (18Cr-7Ni-0.16N) austenitic stainless steel by varying the annealing conditions. The amount of strain-induced alpha-martensite (SIM) during tensile loading was determined by magnetic measurements and the microstructure evolution and texture examined by electron backscatter diffraction and X-ray diffraction methods. The extensive experimental data evidenced firmly that in completely austenitic structures the austenite stability increases with decreasing grain size down to about 1 micrometer, obtained at 900 °C, but the stability decreases drastically in the ultrafine-grained and partially reversed structures, with the average grain size of 0.6–0.7 micrometer obtained at 800–700 °C. However, these structures are nonuniform also containing larger micron-size grains transformed from slightly deformed SIM. The low stability of austenite is not a result from the ultrafine grain size, neither due to retained phases nor texture, but the main reason is concluded to be the precipitation of CrN during the reversion at low temperatures of 800–700 °C. Due to this precipitation, micron-size grains in the ultrafine and partially reversed structures show most unstable behavior under tensile deformation.

Czech name

—

Czech description

—

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 Characterization

ISSN

1044-5803

e-ISSN

—

Volume of the periodical

127

Issue of the periodical within the volume

MAY

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

12-26

UT code for WoS article

000404817000002

EID of the result in the Scopus database

2-s2.0-85014707257